Remove 1sh sources

I'm going to recreate it from fresh sh sources for clean git history.

64 files changed, 0 insertions, 24038 deletions

diff --git a/bin/1sh/1sh-kill.1 b/bin/1sh/1sh-kill.1
deleted file mode 100644
index b8fef5ff..00000000
--- a/bin/1sh/1sh-kill.1
+++ /dev/null
@@ -1,157 +0,0 @@
-.\"-
-.\" Copyright (c) 1980, 1990, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" the Institute of Electrical and Electronics Engineers, Inc.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	@(#)kill.1	8.2 (Berkeley) 4/28/95
-.\" $FreeBSD: releng/12.0/bin/kill/kill.1 314436 2017-02-28 23:42:47Z imp $
-.\"
-.Dd October 3, 2016
-.Dt 1SH-KILL 1
-.Os
-.Sh NAME
-.Nm kill
-.Nd terminate or signal a process
-.Sh SYNOPSIS
-.Nm
-.Op Fl s Ar signal_name
-.Ar pid ...
-.Nm
-.Fl l
-.Op Ar exit_status
-.Nm
-.Fl Ar signal_name
-.Ar pid ...
-.Nm
-.Fl Ar signal_number
-.Ar pid ...
-.Sh DESCRIPTION
-The
-.Nm
-utility sends a signal to the processes specified by the
-.Ar pid
-operands.
-.Pp
-Only the super-user may send signals to other users' processes.
-.Pp
-The options are as follows:
-.Bl -tag -width indent
-.It Fl s Ar signal_name
-A symbolic signal name specifying the signal to be sent instead of the
-default
-.Dv TERM .
-.It Fl l Op Ar exit_status
-If no operand is given, list the signal names; otherwise, write
-the signal name corresponding to
-.Ar exit_status .
-.It Fl Ar signal_name
-A symbolic signal name specifying the signal to be sent instead of the
-default
-.Dv TERM .
-.It Fl Ar signal_number
-A non-negative decimal integer, specifying the signal to be sent instead
-of the default
-.Dv TERM .
-.El
-.Pp
-The following PIDs have special meanings:
-.Bl -tag -width indent
-.It -1
-If superuser, broadcast the signal to all processes; otherwise broadcast
-to all processes belonging to the user.
-.El
-.Pp
-Some of the more commonly used signals:
-.Pp
-.Bl -tag -width indent -compact
-.It 1
-HUP (hang up)
-.It 2
-INT (interrupt)
-.It 3
-QUIT (quit)
-.It 6
-ABRT (abort)
-.It 9
-KILL (non-catchable, non-ignorable kill)
-.It 14
-ALRM (alarm clock)
-.It 15
-TERM (software termination signal)
-.El
-.Pp
-Some shells may provide a builtin
-.Nm
-command which is similar or identical to this utility.
-Consult the
-.Xr builtin 1
-manual page.
-.Sh EXIT STATUS
-.Ex -std
-.Sh EXAMPLES
-Terminate
-the processes with PIDs 142 and 157:
-.Pp
-.Dl "kill 142 157"
-.Pp
-Send the hangup signal
-.Pq Dv SIGHUP
-to the process with PID 507:
-.Pp
-.Dl "kill -s HUP 507"
-.Pp
-Terminate the process group with PGID 117:
-.Pp
-.Dl "kill -- -117"
-.Sh SEE ALSO
-.Xr builtin 1 ,
-.Xr csh 1 ,
-.Xr killall 1 ,
-.Xr ps 1 ,
-.Xr sh 1 ,
-.Xr kill 2 ,
-.Xr sigaction 2
-.Sh STANDARDS
-The
-.Nm
-utility is expected to be
-.St -p1003.2
-compatible.
-.Sh HISTORY
-A
-.Nm
-command appeared in
-.At v3
-in section 8 of the manual.
-.Sh BUGS
-A replacement for the command
-.Dq Li kill 0
-for
-.Xr csh 1
-users should be provided.
diff --git a/bin/1sh/1sh-printf.1 b/bin/1sh/1sh-printf.1
deleted file mode 100644
index 8ef04674..00000000
--- a/bin/1sh/1sh-printf.1
+++ /dev/null
@@ -1,382 +0,0 @@
-.\" Copyright (c) 1989, 1990, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" the Institute of Electrical and Electronics Engineers, Inc.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	@(#)printf.1	8.1 (Berkeley) 6/6/93
-.\" $FreeBSD: releng/12.0/usr.bin/printf/printf.1 314436 2017-02-28 23:42:47Z imp $
-.\"
-.Dd April 21, 2014
-.Dt 1SH-PRINTF 1
-.Os
-.Sh NAME
-.Nm printf
-.Nd formatted output
-.Sh SYNOPSIS
-.Nm
-.Ar format Op Ar arguments ...
-.Sh DESCRIPTION
-The
-.Nm
-utility formats and prints its arguments, after the first, under control
-of the
-.Ar format .
-The
-.Ar format
-is a character string which contains three types of objects: plain characters,
-which are simply copied to standard output, character escape sequences which
-are converted and copied to the standard output, and format specifications,
-each of which causes printing of the next successive
-.Ar argument .
-.Pp
-The
-.Ar arguments
-after the first are treated as strings if the corresponding format is
-either
-.Cm c , b
-or
-.Cm s ;
-otherwise it is evaluated as a C constant, with the following extensions:
-.Pp
-.Bl -bullet -offset indent -compact
-.It
-A leading plus or minus sign is allowed.
-.It
-If the leading character is a single or double quote, the value is the
-character code of the next character.
-.El
-.Pp
-The format string is reused as often as necessary to satisfy the
-.Ar arguments .
-Any extra format specifications are evaluated with zero or the null
-string.
-.Pp
-Character escape sequences are in backslash notation as defined in the
-.St -ansiC ,
-with extensions.
-The characters and their meanings
-are as follows:
-.Pp
-.Bl -tag -width Ds -offset indent -compact
-.It Cm \ea
-Write a <bell> character.
-.It Cm \eb
-Write a <backspace> character.
-.It Cm \ec
-Ignore remaining characters in this string.
-.It Cm \ef
-Write a <form-feed> character.
-.It Cm \en
-Write a <new-line> character.
-.It Cm \er
-Write a <carriage return> character.
-.It Cm \et
-Write a <tab> character.
-.It Cm \ev
-Write a <vertical tab> character.
-.It Cm \e\'
-Write a <single quote> character.
-.It Cm \e\e
-Write a backslash character.
-.It Cm \e Ns Ar num
-Write a byte whose
-value is the 1-, 2-, or 3-digit
-octal number
-.Ar num .
-Multibyte characters can be constructed using multiple
-.Cm \e Ns Ar num
-sequences.
-.El
-.Pp
-Each format specification is introduced by the percent character
-(``%'').
-The remainder of the format specification includes,
-in the following order:
-.Bl -tag -width Ds
-.It "Zero or more of the following flags:"
-.Bl -tag -width Ds
-.It Cm #
-A `#' character
-specifying that the value should be printed in an ``alternate form''.
-For
-.Cm b , c , d , s
-and
-.Cm u
-formats, this option has no effect.
-For the
-.Cm o
-formats the precision of the number is increased to force the first
-character of the output string to a zero.
-For the
-.Cm x
-.Pq Cm X
-format, a non-zero result has the string
-.Li 0x
-.Pq Li 0X
-prepended to it.
-For
-.Cm a , A , e , E , f , F , g
-and
-.Cm G
-formats, the result will always contain a decimal point, even if no
-digits follow the point (normally, a decimal point only appears in the
-results of those formats if a digit follows the decimal point).
-For
-.Cm g
-and
-.Cm G
-formats, trailing zeros are not removed from the result as they
-would otherwise be;
-.It Cm \&\-
-A minus sign `\-' which specifies
-.Em left adjustment
-of the output in the indicated field;
-.It Cm \&+
-A `+' character specifying that there should always be
-a sign placed before the number when using signed formats.
-.It Sq \&\ \&
-A space specifying that a blank should be left before a positive number
-for a signed format.
-A `+' overrides a space if both are used;
-.It Cm \&0
-A zero `0' character indicating that zero-padding should be used
-rather than blank-padding.
-A `\-' overrides a `0' if both are used;
-.El
-.It "Field Width:"
-An optional digit string specifying a
-.Em field width ;
-if the output string has fewer bytes than the field width it will
-be blank-padded on the left (or right, if the left-adjustment indicator
-has been given) to make up the field width (note that a leading zero
-is a flag, but an embedded zero is part of a field width);
-.It Precision:
-An optional period,
-.Sq Cm \&.\& ,
-followed by an optional digit string giving a
-.Em precision
-which specifies the number of digits to appear after the decimal point,
-for
-.Cm e
-and
-.Cm f
-formats, or the maximum number of bytes to be printed
-from a string; if the digit string is missing, the precision is treated
-as zero;
-.It Format:
-A character which indicates the type of format to use (one of
-.Cm diouxXfFeEgGaAcsb ) .
-The uppercase formats differ from their lowercase counterparts only in
-that the output of the former is entirely in uppercase.
-The floating-point format specifiers
-.Pq Cm fFeEgGaA
-may be prefixed by an
-.Cm L
-to request that additional precision be used, if available.
-.El
-.Pp
-A field width or precision may be
-.Sq Cm \&*
-instead of a digit string.
-In this case an
-.Ar argument
-supplies the field width or precision.
-.Pp
-The format characters and their meanings are:
-.Bl -tag -width Fl
-.It Cm diouXx
-The
-.Ar argument
-is printed as a signed decimal (d or i), unsigned octal, unsigned decimal,
-or unsigned hexadecimal (X or x), respectively.
-.It Cm fF
-The
-.Ar argument
-is printed in the style `[\-]ddd.ddd' where the number of d's
-after the decimal point is equal to the precision specification for
-the argument.
-If the precision is missing, 6 digits are given; if the precision
-is explicitly 0, no digits and no decimal point are printed.
-The values \*[If] and \*[Na] are printed as
-.Ql inf
-and
-.Ql nan ,
-respectively.
-.It Cm eE
-The
-.Ar argument
-is printed in the style
-.Cm e
-.Sm off
-.Sq Op - Ar d.ddd No \(+- Ar dd
-.Sm on
-where there
-is one digit before the decimal point and the number after is equal to
-the precision specification for the argument; when the precision is
-missing, 6 digits are produced.
-The values \*[If] and \*[Na] are printed as
-.Ql inf
-and
-.Ql nan ,
-respectively.
-.It Cm gG
-The
-.Ar argument
-is printed in style
-.Cm f
-.Pq Cm F
-or in style
-.Cm e
-.Pq Cm E
-whichever gives full precision in minimum space.
-.It Cm aA
-The
-.Ar argument
-is printed in style
-.Sm off
-.Sq Op - Ar h.hhh No \(+- Li p Ar d
-.Sm on
-where there is one digit before the hexadecimal point and the number
-after is equal to the precision specification for the argument;
-when the precision is missing, enough digits are produced to convey
-the argument's exact double-precision floating-point representation.
-The values \*[If] and \*[Na] are printed as
-.Ql inf
-and
-.Ql nan ,
-respectively.
-.It Cm c
-The first byte of
-.Ar argument
-is printed.
-.It Cm s
-Bytes from the string
-.Ar argument
-are printed until the end is reached or until the number of bytes
-indicated by the precision specification is reached; however if the
-precision is 0 or missing, the string is printed entirely.
-.It Cm b
-As for
-.Cm s ,
-but interpret character escapes in backslash notation in the string
-.Ar argument .
-The permitted escape sequences are slightly different in that
-octal escapes are
-.Cm \e0 Ns Ar num
-instead of
-.Cm \e Ns Ar num .
-.It Cm n$
-Allows reordering of the output according to
-.Ar argument .
-.It Cm \&%
-Print a `%'; no argument is used.
-.El
-.Pp
-The decimal point
-character is defined in the program's locale (category
-.Dv LC_NUMERIC ) .
-.Pp
-In no case does a non-existent or small field width cause truncation of
-a field; padding takes place only if the specified field width exceeds
-the actual width.
-.Pp
-Some shells may provide a builtin
-.Nm
-command which is similar or identical to this utility.
-Consult the
-.Xr builtin 1
-manual page.
-.Sh EXIT STATUS
-.Ex -std
-.Sh COMPATIBILITY
-The traditional
-.Bx
-behavior of converting arguments of numeric formats not beginning
-with a digit to the
-.Tn ASCII
-code of the first character is not supported.
-.Sh SEE ALSO
-.Xr builtin 1 ,
-.Xr echo 1 ,
-.Xr sh 1 ,
-.Xr printf 3
-.Sh STANDARDS
-The
-.Nm
-command is expected to be compatible with the
-.St -p1003.2
-specification.
-.Sh HISTORY
-The
-.Nm
-command appeared in
-.Bx 4.3 Reno .
-It is modeled
-after the standard library function,
-.Xr printf 3 .
-.Sh CAVEATS
-.Tn ANSI
-hexadecimal character constants were deliberately not provided.
-.Pp
-Trying to print a dash ("-") as the first character causes
-.Nm
-to interpret the dash as a program argument.
-.Nm --
-must be used before
-.Ar format .
-.Pp
-If the locale contains multibyte characters
-(such as UTF-8),
-the
-.Cm c
-format and
-.Cm b
-and
-.Cm s
-formats with a precision
-may not operate as expected.
-.Sh BUGS
-Since the floating point numbers are translated from
-.Tn ASCII
-to floating-point and
-then back again, floating-point precision may be lost.
-(By default, the number is translated to an IEEE-754 double-precision
-value before being printed.
-The
-.Cm L
-modifier may produce additional precision, depending on the hardware platform.)
-.Pp
-The escape sequence \e000 is the string terminator.
-When present in the argument for the
-.Cm b
-format, the argument will be truncated at the \e000 character.
-.Pp
-Multibyte characters are not recognized in format strings (this is only
-a problem if
-.Ql %
-can appear inside a multibyte character).
diff --git a/bin/1sh/1sh-test.1 b/bin/1sh/1sh-test.1
deleted file mode 100644
index 78cd75f9..00000000
--- a/bin/1sh/1sh-test.1
+++ /dev/null
@@ -1,395 +0,0 @@
-.\"-
-.\" Copyright (c) 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" the Institute of Electrical and Electronics Engineers, Inc.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)test.1	8.1 (Berkeley) 5/31/93
-.\" $FreeBSD: releng/12.0/bin/test/test.1 314436 2017-02-28 23:42:47Z imp $
-.\"
-.Dd October 5, 2016
-.Dt 1SH-TEST 1
-.Os
-.Sh NAME
-.Nm test ,
-.Nm \&[
-.Nd condition evaluation utility
-.Sh SYNOPSIS
-.Nm
-.Ar expression
-.Nm \&[
-.Ar expression Cm \&]
-.Sh DESCRIPTION
-The
-.Nm
-utility evaluates the expression and, if it evaluates
-to true, returns a zero (true) exit status; otherwise
-it returns 1 (false).
-If there is no expression,
-.Nm
-also
-returns 1 (false).
-.Pp
-All operators and flags are separate arguments to the
-.Nm
-utility.
-.Pp
-The following primaries are used to construct expression:
-.Bl -tag -width Ar
-.It Fl b Ar file
-True if
-.Ar file
-exists and is a block special
-file.
-.It Fl c Ar file
-True if
-.Ar file
-exists and is a character
-special file.
-.It Fl d Ar file
-True if
-.Ar file
-exists and is a directory.
-.It Fl e Ar file
-True if
-.Ar file
-exists (regardless of type).
-.It Fl f Ar file
-True if
-.Ar file
-exists and is a regular file.
-.It Fl g Ar file
-True if
-.Ar file
-exists and its set group ID flag
-is set.
-.It Fl h Ar file
-True if
-.Ar file
-exists and is a symbolic link.
-This operator is retained for compatibility with previous versions of
-this program.
-Do not rely on its existence; use
-.Fl L
-instead.
-.It Fl k Ar file
-True if
-.Ar file
-exists and its sticky bit is set.
-.It Fl n Ar string
-True if the length of
-.Ar string
-is nonzero.
-.It Fl p Ar file
-True if
-.Ar file
-is a named pipe
-.Pq Tn FIFO .
-.It Fl r Ar file
-True if
-.Ar file
-exists and is readable.
-.It Fl s Ar file
-True if
-.Ar file
-exists and has a size greater
-than zero.
-.It Fl t Ar file_descriptor
-True if the file whose file descriptor number
-is
-.Ar file_descriptor
-is open and is associated with a terminal.
-.It Fl u Ar file
-True if
-.Ar file
-exists and its set user ID flag
-is set.
-.It Fl w Ar file
-True if
-.Ar file
-exists and is writable.
-True
-indicates only that the write flag is on.
-The file is not writable on a read-only file
-system even if this test indicates true.
-.It Fl x Ar file
-True if
-.Ar file
-exists and is executable.
-True
-indicates only that the execute flag is on.
-If
-.Ar file
-is a directory, true indicates that
-.Ar file
-can be searched.
-.It Fl z Ar string
-True if the length of
-.Ar string
-is zero.
-.It Fl L Ar file
-True if
-.Ar file
-exists and is a symbolic link.
-.It Fl O Ar file
-True if
-.Ar file
-exists and its owner matches the effective user id of this process.
-.It Fl G Ar file
-True if
-.Ar file
-exists and its group matches the effective group id of this process.
-.It Fl S Ar file
-True if
-.Ar file
-exists and is a socket.
-.It Ar file1 Fl nt Ar file2
-True if
-.Ar file1
-exists and is newer than
-.Ar file2 .
-.It Ar file1 Fl ot Ar file2
-True if
-.Ar file1
-exists and is older than
-.Ar file2 .
-.It Ar file1 Fl ef Ar file2
-True if
-.Ar file1
-and
-.Ar file2
-exist and refer to the same file.
-.It Ar string
-True if
-.Ar string
-is not the null
-string.
-.It Ar s1 Cm = Ar s2
-True if the strings
-.Ar s1
-and
-.Ar s2
-are identical.
-.It Ar s1 Cm != Ar s2
-True if the strings
-.Ar s1
-and
-.Ar s2
-are not identical.
-.It Ar s1 Cm < Ar s2
-True if string
-.Ar s1
-comes before
-.Ar s2
-based on the binary value of their characters.
-.It Ar s1 Cm > Ar s2
-True if string
-.Ar s1
-comes after
-.Ar s2
-based on the binary value of their characters.
-.It Ar n1 Fl eq Ar n2
-True if the integers
-.Ar n1
-and
-.Ar n2
-are algebraically
-equal.
-.It Ar n1 Fl ne Ar n2
-True if the integers
-.Ar n1
-and
-.Ar n2
-are not
-algebraically equal.
-.It Ar n1 Fl gt Ar n2
-True if the integer
-.Ar n1
-is algebraically
-greater than the integer
-.Ar n2 .
-.It Ar n1 Fl ge Ar n2
-True if the integer
-.Ar n1
-is algebraically
-greater than or equal to the integer
-.Ar n2 .
-.It Ar n1 Fl lt Ar n2
-True if the integer
-.Ar n1
-is algebraically less
-than the integer
-.Ar n2 .
-.It Ar n1 Fl le Ar n2
-True if the integer
-.Ar n1
-is algebraically less
-than or equal to the integer
-.Ar n2 .
-.El
-.Pp
-If
-.Ar file
-is a symbolic link,
-.Nm
-will fully dereference it and then evaluate the expression
-against the file referenced, except for the
-.Fl h
-and
-.Fl L
-primaries.
-.Pp
-These primaries can be combined with the following operators:
-.Bl -tag -width Ar
-.It Cm \&! Ar expression
-True if
-.Ar expression
-is false.
-.It Ar expression1 Fl a Ar expression2
-True if both
-.Ar expression1
-and
-.Ar expression2
-are true.
-.It Ar expression1 Fl o Ar expression2
-True if either
-.Ar expression1
-or
-.Ar expression2
-are true.
-.It Cm \&( Ar expression Cm \&)
-True if expression is true.
-.El
-.Pp
-The
-.Fl a
-operator has higher precedence than the
-.Fl o
-operator.
-.Pp
-Some shells may provide a builtin
-.Nm
-command which is similar or identical to this utility.
-Consult the
-.Xr builtin 1
-manual page.
-.Sh GRAMMAR AMBIGUITY
-The
-.Nm
-grammar is inherently ambiguous.
-In order to assure a degree of consistency,
-the cases described in the
-.St -p1003.2 ,
-section D11.2/4.62.4, standard
-are evaluated consistently according to the rules specified in the
-standards document.
-All other cases are subject to the ambiguity in the
-command semantics.
-.Pp
-In particular, only expressions containing
-.Fl a ,
-.Fl o ,
-.Cm \&(
-or
-.Cm \&)
-can be ambiguous.
-.Sh EXIT STATUS
-The
-.Nm
-utility exits with one of the following values:
-.Bl -tag -width indent
-.It 0
-expression evaluated to true.
-.It 1
-expression evaluated to false or expression was
-missing.
-.It >1
-An error occurred.
-.El
-.Sh EXAMPLES
-Implement
-.Li test FILE1 -nt FILE2
-using only
-.Tn POSIX
-functionality:
-.Pp
-.Dl test -n \&"$(find -L -- FILE1 -prune -newer FILE2 2>/dev/null)\&"
-.Pp
-This can be modified using non-standard
-.Xr find 1
-primaries like
-.Cm -newerca
-to compare other timestamps.
-.Sh COMPATIBILITY
-For compatibility with some other implementations,
-the
-.Cm =
-primary can be substituted with
-.Cm ==
-with the same meaning.
-.Sh SEE ALSO
-.Xr builtin 1 ,
-.Xr expr 1 ,
-.Xr find 1 ,
-.Xr sh 1 ,
-.Xr stat 1 ,
-.Xr symlink 7
-.Sh STANDARDS
-The
-.Nm
-utility implements a superset of the
-.St -p1003.2
-specification.
-The primaries
-.Cm < ,
-.Cm == ,
-.Cm > ,
-.Fl ef ,
-.Fl nt ,
-.Fl ot ,
-.Fl G ,
-and
-.Fl O
-are extensions.
-.Sh HISTORY
-A
-.Nm
-utility appeared in
-.At v7 .
-.Sh BUGS
-Both sides are always evaluated in
-.Fl a
-and
-.Fl o .
-For instance, the writable status of
-.Pa file
-will be tested by the following command even though the former expression
-indicated false, which results in a gratuitous access to the file system:
-.Dl "[ -z abc -a -w file ]"
-To avoid this, write
-.Dl "[ -z abc ] && [ -w file ]"
diff --git a/bin/1sh/1sh.1 b/bin/1sh/1sh.1
deleted file mode 100644
index 468b6925..00000000
--- a/bin/1sh/1sh.1
+++ /dev/null
@@ -1,3257 +0,0 @@
-.\"-
-.\" Copyright (c) 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" Kenneth Almquist.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	from: @(#)sh.1	8.6 (Berkeley) 5/4/95
-.\" $FreeBSD: releng/12.0/bin/sh/sh.1 336483 2018-07-19 13:09:29Z 0mp $
-.
-.Dd November 26, 2019
-.Dt 1SH 1
-.Os
-.
-.Sh NAME
-.Nm 1sh
-.Nd a (one) shell
-.
-.Sh SYNOPSIS
-.Nm
-.Op Fl /+abCEefhIimnPpTuVvx
-.Op Fl /+o Ar longname
-.Oo
-.Ar script
-.Op Ar arg ...
-.Oc
-.
-.Nm
-.Op Fl /+abCEefhIimnPpTuVvx
-.Op Fl /+o Ar longname
-.Fl c Ar string
-.Oo
-.Ar name
-.Op Ar arg ...
-.Oc
-.
-.Nm
-.Op Fl /+abCEefhIimnPpTuVvx
-.Op Fl /+o Ar longname
-.Fl s
-.Op Ar arg ...
-.
-.Sh DESCRIPTION
-The
-.Nm
-utility is a command interpreter.
-The current version of
-.Nm
-is close to the
-.St -p1003.1
-specification for the shell.
-It only supports features
-designated by POSIX,
-plus a few Berkeley extensions.
-This man page is not intended to be a tutorial nor a complete
-specification of the shell.
-.
-.Ss Overview
-The shell is a command that reads lines from
-either a file or the terminal, interprets them, and
-generally executes other commands.
-It is the program that is started when a user logs into the system,
-although a user can select a different shell with the
-.Xr chsh 1
-command.
-The shell
-implements a language that has flow control constructs,
-a macro facility that provides a variety of features in
-addition to data storage, along with built-in history and line
-editing capabilities.
-It incorporates many features to
-aid interactive use and has the advantage that the interpretative
-language is common to both interactive and non-interactive
-use (shell scripts).
-That is, commands can be typed directly
-to the running shell or can be put into a file,
-which can be executed directly by the shell.
-.
-.Ss Invocation
-.\"
-.\" XXX This next sentence is incredibly confusing.
-.\"
-If no arguments are present and if the standard input of the shell
-is connected to a terminal
-(or if the
-.Fl i
-option is set),
-the shell is considered an interactive shell.
-An interactive shell
-generally prompts before each command and handles programming
-and command errors differently (as described below).
-When first starting, the shell inspects argument 0, and
-if it begins with a dash
-.Pq Ql - ,
-the shell is also considered a login shell.
-This is normally done automatically by the system
-when the user first logs in.
-A login shell first reads commands
-from the files
-.Pa /etc/profile
-and then
-.Pa .profile
-in a user's home directory,
-if they exist.
-If the environment variable
-.Ev ENV
-is set on entry to a shell, or is set in the
-.Pa .profile
-of a login shell, the shell then subjects its value to parameter expansion
-and arithmetic expansion and reads commands from the named file.
-Therefore, a user should place commands that are to be executed only
-at login time in the
-.Pa .profile
-file, and commands that are executed for every shell inside the
-.Ev ENV
-file.
-The user can set the
-.Ev ENV
-variable to some file by placing the following line in the file
-.Pa .profile
-in the home directory,
-substituting for
-.Pa .shrc
-the filename desired:
-.
-.Pp
-.Dl "ENV=$HOME/.shrc; export ENV"
-.
-.Pp
-The first non-option argument specified on the command line
-will be treated as the
-name of a file from which to read commands (a shell script), and
-the remaining arguments are set as the positional parameters
-of the shell
-.Li ( $1 , $2 ,
-etc.).
-Otherwise, the shell reads commands
-from its standard input.
-.
-.Pp
-Unlike older versions of
-.Xr sh 1
-the
-.Ev ENV
-script is only sourced on invocation of interactive shells.
-This
-closes a well-known, and sometimes easily exploitable security
-hole related to poorly thought out
-.Ev ENV
-scripts.
-.
-.Ss Argument List Processing
-All of the single letter options to
-.Nm
-have a corresponding long name,
-with the exception of
-.Fl c
-and
-.Fl /+o .
-These long names are provided next to the single letter options
-in the descriptions below.
-The long name for an option may be specified as an argument to the
-.Fl /+o
-option of
-.Nm .
-Once the shell is running,
-the long name for an option may be specified as an argument to the
-.Fl /+o
-option of the
-.Ic set
-built-in command
-(described later in the section called
-.Sx Built-in Commands ) .
-Introducing an option with a dash
-.Pq Ql -
-enables the option,
-while using a plus
-.Pq Ql +
-disables the option.
-A
-.Dq Li --
-or plain
-.Ql -
-will stop option processing and will force the remaining
-words on the command line to be treated as arguments.
-The
-.Fl /+o
-and
-.Fl c
-options do not have long names.
-They take arguments and are described after the single letter options.
-.
-.Bl -tag -width indent
-.It Fl a Li allexport
-Flag variables for export when assignments are made to them.
-.
-.It Fl b Li notify
-Enable asynchronous notification of background job
-completion.
-(UNIMPLEMENTED)
-.
-.It Fl C Li noclobber
-Do not overwrite existing files with
-.Ql > .
-.
-.It Fl E Li emacs
-Enable the built-in
-.Xr emacs 1
-command line editor (disables the
-.Fl V
-option if it has been set;
-set automatically when interactive on terminals).
-.
-.It Fl e Li errexit
-Exit immediately if any untested command fails in non-interactive mode.
-The exit status of a command is considered to be
-explicitly tested if the command is part of the list used to control
-an
-.Ic if , elif , while ,
-or
-.Ic until ;
-if the command is the left
-hand operand of an
-.Dq Li &&
-or
-.Dq Li ||
-operator; or if the command is a pipeline preceded by the
-.Ic !\&
-keyword.
-If a shell function is executed and its exit status is explicitly
-tested, all commands of the function are considered to be tested as
-well.
-.
-.Pp
-It is recommended to check for failures explicitly
-instead of relying on
-.Fl e
-because it tends to behave in unexpected ways,
-particularly in larger scripts.
-.
-.It Fl f Li noglob
-Disable pathname expansion.
-.
-.It Fl h Li trackall
-A do-nothing option for POSIX compliance.
-.
-.It Fl I Li ignoreeof
-Ignore
-.Dv EOF Ap s
-from input when in interactive mode.
-.
-.It Fl i Li interactive
-Force the shell to behave interactively.
-.
-.It Fl m Li monitor
-Turn on job control (set automatically when interactive).
-A new process group is created for each pipeline (called a job).
-It is possible to suspend jobs or to have them run in the foreground or
-in the background.
-In a non-interactive shell,
-this option can be set even if no terminal is available
-and is useful to place processes in separate process groups.
-.
-.It Fl n Li noexec
-If not interactive, read commands but do not
-execute them.
-This is useful for checking the
-syntax of shell scripts.
-.
-.It Fl P Li physical
-Change the default for the
-.Ic cd
-and
-.Ic pwd
-commands from
-.Fl L
-(logical directory layout)
-to
-.Fl P
-(physical directory layout).
-.
-.It Fl p Li privileged
-Turn on privileged mode.
-This mode is enabled on startup
-if either the effective user or group ID is not equal to the
-real user or group ID.
-Turning this mode off sets the
-effective user and group IDs to the real user and group IDs.
-When this mode is enabled for interactive shells, the file
-.Pa /etc/suid_profile
-is sourced instead of
-.Pa ~/.profile
-after
-.Pa /etc/profile
-is sourced, and the contents of the
-.Ev ENV
-variable are ignored.
-.
-.It Fl s Li stdin
-Read commands from standard input (set automatically
-if no file arguments are present).
-This option has
-no effect when set after the shell has already started
-running (i.e., when set with the
-.Ic set
-command).
-.
-.It Fl T Li trapsasync
-When waiting for a child, execute traps immediately.
-If this option is not set,
-traps are executed after the child exits,
-as specified in
-.St -p1003.2 .
-This nonstandard option is useful for putting guarding shells around
-children that block signals.
-The surrounding shell may kill the child
-or it may just return control to the tty and leave the child alone,
-like this:
-.Bd -literal -offset indent
-1sh -T -c "trap 'exit 1' 2 ; some-blocking-program"
-.Ed
-.
-.It Fl u Li nounset
-Write a message to standard error when attempting
-to expand a variable, a positional parameter or
-the special parameter
-.Va \&!
-that is not set, and if the
-shell is not interactive, exit immediately.
-.
-.It Fl V Li vi
-Enable the built-in
-.Xr vi 1
-command line editor (disables
-.Fl E
-if it has been set).
-.
-.It Fl v Li verbose
-The shell writes its input to standard error
-as it is read.
-Useful for debugging.
-.
-.It Fl x Li xtrace
-Write each command
-(preceded by the value of the
-.Va PS4
-variable subjected to parameter expansion and arithmetic expansion)
-to standard error before it is executed.
-Useful for debugging.
-.
-.It Li nolog
-Another do-nothing option for POSIX compliance.
-It only has a long name.
-.El
-.
-.Pp
-The
-.Fl c
-option causes the commands to be read from the
-.Ar string
-operand instead of from the standard input.
-Keep in mind that this option only accepts a single string as its
-argument, hence multi-word strings must be quoted.
-.
-.Pp
-The
-.Fl /+o
-option takes as its only argument the long name of an option
-to be enabled or disabled.
-For example, the following two invocations of
-.Nm
-both enable the built-in
-.Xr emacs 1
-command line editor:
-.Bd -literal -offset indent
-set -E
-set -o emacs
-.Ed
-.
-.Pp
-If used without an argument, the
-.Fl o
-option displays the current option settings in a human-readable format.
-If
-.Cm +o
-is used without an argument, the current option settings are output
-in a format suitable for re-input into the shell.
-.
-.Ss Lexical Structure
-The shell reads input in terms of lines from a file and breaks
-it up into words at whitespace (blanks and tabs), and at
-certain sequences of
-characters called
-.Dq operators ,
-which are special to the shell.
-There are two types of operators: control operators and
-redirection operators (their meaning is discussed later).
-The following is a list of valid operators:
-.
-.Bl -tag -width indent
-.It Control operators:
-.Bl -column "XXX" "XXX" "XXX" "XXX" "XXX" -offset center -compact
-.It Li & Ta Li && Ta Li \&( Ta Li \&) Ta Li \en
-.It Li ;; Ta Li ;& Ta Li \&; Ta Li \&| Ta Li ||
-.El
-.
-.It Redirection operators:
-.Bl -column "XXX" "XXX" "XXX" "XXX" "XXX" -offset center -compact
-.It Li < Ta Li > Ta Li << Ta Li >> Ta Li <>
-.It Li <& Ta Li >& Ta Li <<- Ta Li >| Ta \&
-.El
-.El
-.
-.Pp
-The character
-.Ql #
-introduces a comment if used at the beginning of a word.
-The word starting with
-.Ql #
-and the rest of the line are ignored.
-.
-.Pp
-ASCII
-.Dv NUL
-characters (character code 0) are not allowed in shell input.
-.
-.Ss Quoting
-Quoting is used to remove the special meaning of certain characters
-or words to the shell, such as operators, whitespace, keywords,
-or alias names.
-.
-.Pp
-There are four types of quoting: matched single quotes,
-dollar-single quotes,
-matched double quotes, and backslash.
-.
-.Bl -tag -width indent
-.It Single Quotes
-Enclosing characters in single quotes preserves the literal
-meaning of all the characters (except single quotes, making
-it impossible to put single-quotes in a single-quoted string).
-.
-.It Dollar-Single Quotes
-Enclosing characters between
-.Li $'
-and
-.Li '
-preserves the literal meaning of all characters
-except backslashes and single quotes.
-A backslash introduces a C-style escape sequence:
-.
-.Bl -tag -width xUnnnnnnnn
-.It \ea
-Alert (ring the terminal bell)
-.It \eb
-Backspace
-.It \ec Ns Ar c
-The control character denoted by
-.Li ^ Ns Ar c
-in
-.Xr stty 1 .
-If
-.Ar c
-is a backslash, it must be doubled.
-.It \ee
-The ESC character (ASCII 0x1b)
-.It \ef
-Formfeed
-.It \en
-Newline
-.It \er
-Carriage return
-.It \et
-Horizontal tab
-.It \ev
-Vertical tab
-.It \e\e
-Literal backslash
-.It \e\&'
-Literal single-quote
-.It \e\&"
-Literal double-quote
-.It \e Ns Ar nnn
-The byte whose octal value is
-.Ar nnn
-(one to three digits)
-.It \ex Ns Ar nn
-The byte whose hexadecimal value is
-.Ar nn
-(one or more digits only the last two of which are used)
-.It \eu Ns Ar nnnn
-The Unicode code point
-.Ar nnnn
-(four hexadecimal digits)
-.It \eU Ns Ar nnnnnnnn
-The Unicode code point
-.Ar nnnnnnnn
-(eight hexadecimal digits)
-.El
-.
-.Pp
-The sequences for Unicode code points are currently only useful with
-UTF-8 locales.
-They reject code point 0 and UTF-16 surrogates.
-.
-.Pp
-If an escape sequence would produce a byte with value 0,
-that byte and the rest of the string until the matching single-quote
-are ignored.
-.
-.Pp
-Any other string starting with a backslash is an error.
-.
-.It Double Quotes
-Enclosing characters within double quotes preserves the literal
-meaning of all characters except dollar sign
-.Pq Ql $ ,
-backquote
-.Pq Ql ` ,
-and backslash
-.Pq Ql \e .
-The backslash inside double quotes is historically weird.
-It remains literal unless it precedes the following characters,
-which it serves to quote:
-.
-.Pp
-.Bl -column "XXX" "XXX" "XXX" "XXX" "XXX" -offset center -compact
-.It Li $ Ta Li ` Ta Li \&" Ta Li \e Ta Li \en
-.El
-.
-.It Backslash
-A backslash preserves the literal meaning of the following
-character, with the exception of the newline character
-.Pq Ql \en .
-A backslash preceding a newline is treated as a line continuation.
-.El
-.
-.Ss Keywords
-Keywords or reserved words are words that have special meaning to the
-shell and are recognized at the beginning of a line and
-after a control operator.
-The following are keywords:
-.Bl -column "doneXX" "elifXX" "elseXX" "untilXX" "whileX" -offset center
-.It Li \&! Ta { Ta } Ta Ic case Ta Ic do
-.It Ic done Ta Ic elif Ta Ic else Ta Ic esac Ta Ic fi
-.It Ic for Ta Ic if Ta Ic then Ta Ic until Ta Ic while
-.El
-.
-.Ss Aliases
-An alias is a name and corresponding value set using the
-.Ic alias
-built-in command.
-Wherever the command word of a simple command may occur,
-and after checking for keywords if a keyword may occur, the shell
-checks the word to see if it matches an alias.
-If it does, it replaces it in the input stream with its value.
-For example, if there is an alias called
-.Dq Li lf
-with the value
-.Dq Li "ls -F" ,
-then the input
-.Pp
-.Dl "lf foobar"
-.Pp
-would become
-.Pp
-.Dl "ls -F foobar"
-.
-.Pp
-Aliases are also recognized after an alias
-whose value ends with a space or tab.
-For example, if there is also an alias called
-.Dq Li nohup
-with the value
-.Dq Li "nohup " ,
-then the input
-.Pp
-.Dl "nohup lf foobar"
-.Pp
-would become
-.Pp
-.Dl "nohup ls -F foobar"
-.
-.Pp
-Aliases provide a convenient way for naive users to
-create shorthands for commands without having to learn how
-to create functions with arguments.
-Using aliases in scripts is discouraged
-because the command that defines them must be executed
-before the code that uses them is parsed.
-This is fragile and not portable.
-.
-.Pp
-An alias name may be escaped in a command line, so that it is not
-replaced by its alias value, by using quoting characters within or
-adjacent to the alias name.
-This is most often done by prefixing
-an alias name with a backslash to execute a function, built-in, or
-normal program with the same name.
-See the
-.Sx Quoting
-subsection.
-.
-.Ss Commands
-The shell interprets the words it reads according to a
-language, the specification of which is outside the scope
-of this man page (refer to the BNF in the
-.St -p1003.2
-document).
-Essentially though, a line is read and if
-the first word of the line (or after a control operator)
-is not a keyword, then the shell has recognized a
-simple command.
-Otherwise, a complex command or some
-other special construct may have been recognized.
-.
-.Ss Simple Commands
-If a simple command has been recognized, the shell performs
-the following actions:
-.
-.Bl -enum
-.It
-Leading words of the form
-.Dq Li name=value
-are stripped off and assigned to the environment of
-the simple command
-(they do not affect expansions).
-Redirection operators and
-their arguments (as described below) are stripped
-off and saved for processing.
-.
-.It
-The remaining words are expanded as described in
-the section called
-.Sx Word Expansions ,
-and the first remaining word is considered the command
-name and the command is located.
-The remaining
-words are considered the arguments of the command.
-If no command name resulted, then the
-.Dq Li name=value
-variable assignments recognized in 1) affect the
-current shell.
-.
-.It
-Redirections are performed as described in
-the next section.
-.El
-.
-.Ss Redirections
-Redirections are used to change where a command reads its input
-or sends its output.
-In general, redirections open, close, or
-duplicate an existing reference to a file.
-The overall format
-used for redirection is:
-.Pp
-.D1 Oo Ar n Oc Ar redir-op file
-.
-.Pp
-The
-.Ar redir-op
-is one of the redirection operators mentioned
-previously.
-The following gives some examples of how these
-operators can be used.
-Note that stdin and stdout are commonly used abbreviations
-for standard input and standard output respectively.
-.
-.Bl -tag -width "1234567890XX" -offset indent
-.It Oo Ar n Oc Ns Li > Ar file
-redirect stdout (or file descriptor
-.Ar n )
-to
-.Ar file
-.
-.It Oo Ar n Oc Ns Li >| Ar file
-same as above, but override the
-.Fl C
-option
-.
-.It Oo Ar n Oc Ns Li >> Ar file
-append stdout (or file descriptor
-.Ar n )
-to
-.Ar file
-.
-.It Oo Ar n Oc Ns Li < Ar file
-redirect stdin (or file descriptor
-.Ar n )
-from
-.Ar file
-.
-.It Oo Ar n Oc Ns Li <> Ar file
-redirect stdin (or file descriptor
-.Ar n )
-to and from
-.Ar file
-.
-.It Oo Ar n1 Oc Ns Li <& Ns Ar n2
-duplicate stdin (or file descriptor
-.Ar n1 )
-from file descriptor
-.Ar n2
-.
-.It Oo Ar n Oc Ns Li <&-
-close stdin (or file descriptor
-.Ar n )
-.
-.It Oo Ar n1 Oc Ns Li >& Ns Ar n2
-duplicate stdout (or file descriptor
-.Ar n1 )
-to file descriptor
-.Ar n2
-.
-.It Oo Ar n Oc Ns Li >&-
-close stdout (or file descriptor
-.Ar n )
-.El
-.
-.Pp
-The following redirection is often called a
-.Dq here-document .
-.Bd -unfilled -offset indent
-.Oo Ar n Oc Ns Li << Ar delimiter
-.Ar here-doc-text
-.Ar ...
-.Ar delimiter
-.Ed
-.
-.Pp
-All the text on successive lines up to the delimiter is
-saved away and made available to the command on standard
-input, or file descriptor
-.Ar n
-if it is specified.
-If the
-.Ar delimiter
-as specified on the initial line is quoted, then the
-.Ar here-doc-text
-is treated literally, otherwise the text is subjected to
-parameter expansion, command substitution, and arithmetic
-expansion (as described in the section on
-.Sx Word Expansions ) .
-If the operator is
-.Dq Li <<-
-instead of
-.Dq Li << ,
-then leading tabs
-in the
-.Ar here-doc-text
-are stripped.
-.
-.Ss Search and Execution
-There are three types of commands: shell functions,
-built-in commands, and normal programs.
-The command is searched for (by name) in that order.
-The three types of commands are all executed in a different way.
-.
-.Pp
-When a shell function is executed, all of the shell positional
-parameters (except
-.Li $0 ,
-which remains unchanged) are
-set to the arguments of the shell function.
-The variables which are explicitly placed in the environment of
-the command (by placing assignments to them before the
-function name) are made local to the function and are set
-to the values given.
-Then the command given in the function definition is executed.
-The positional parameters are restored to their original values
-when the command completes.
-This all occurs within the current shell.
-.
-.Pp
-Shell built-in commands are executed internally to the shell, without
-spawning a new process.
-There are two kinds of built-in commands: regular and special.
-Assignments before special builtins persist after they finish
-executing and assignment errors, redirection errors and certain
-operand errors cause a script to be aborted.
-Special builtins cannot be overridden with a function.
-Both regular and special builtins can affect the shell in ways
-normal programs cannot.
-.
-.Pp
-Otherwise, if the command name does not match a function
-or built-in command, the command is searched for as a normal
-program in the file system (as described in the next section).
-When a normal program is executed, the shell runs the program,
-passing the arguments and the environment to the program.
-If the program is not a normal executable file
-(i.e., if it does not begin with the
-.Dq "magic number"
-whose ASCII representation is
-.Dq Li #! ,
-resulting in an
-.Er ENOEXEC
-return value from
-.Xr execve 2 )
-but appears to be a text file,
-the shell will run a new instance of
-.Nm
-to interpret it.
-.
-.Pp
-Note that previous versions of this document
-and the source code itself misleadingly and sporadically
-refer to a shell script without a magic number
-as a
-.Dq "shell procedure" .
-.
-.Ss Path Search
-When locating a command, the shell first looks to see if
-it has a shell function by that name.
-Then it looks for a
-built-in command by that name.
-If a built-in command is not found,
-one of two things happen:
-.
-.Bl -enum
-.It
-Command names containing a slash are simply executed without
-performing any searches.
-.
-.It
-The shell searches each entry in the
-.Va PATH
-variable
-in turn for the command.
-The value of the
-.Va PATH
-variable should be a series of
-entries separated by colons.
-Each entry consists of a
-directory name.
-The current directory
-may be indicated implicitly by an empty directory name,
-or explicitly by a single period.
-.El
-.
-.Ss Command Exit Status
-Each command has an exit status that can influence the behavior
-of other shell commands.
-The paradigm is that a command exits
-with zero for normal or success, and non-zero for failure,
-error, or a false indication.
-The man page for each command
-should indicate the various exit codes and what they mean.
-Additionally, the built-in commands return exit codes, as does
-an executed shell function.
-.
-.Pp
-If a command is terminated by a signal, its exit status is greater than 128.
-The signal name can be found by passing the exit status to
-.Li kill -l .
-.
-.Pp
-If there is no command word,
-the exit status is the exit status of the last command substitution executed,
-or zero if the command does not contain any command substitutions.
-.
-.Ss Complex Commands
-Complex commands are combinations of simple commands
-with control operators or keywords, together creating a larger complex
-command.
-More generally, a command is one of the following:
-.
-.Bl -item -offset indent
-.It
-simple command
-.It
-pipeline
-.It
-list or compound-list
-.It
-compound command
-.It
-function definition
-.El
-.
-.Pp
-Unless otherwise stated, the exit status of a command is
-that of the last simple command executed by the command,
-or zero if no simple command was executed.
-.
-.Ss Pipelines
-A pipeline is a sequence of one or more commands separated
-by the control operator
-.Ql \&| .
-The standard output of all but
-the last command is connected to the standard input
-of the next command.
-The standard output of the last
-command is inherited from the shell, as usual.
-.
-.Pp
-The format for a pipeline is:
-.Pp
-.D1 Oo Li \&! Oc Ar command1 Op Li \&| Ar command2 ...
-.
-.Pp
-The standard output of
-.Ar command1
-is connected to the standard input of
-.Ar command2 .
-The standard input, standard output, or
-both of a command is considered to be assigned by the
-pipeline before any redirection specified by redirection
-operators that are part of the command.
-.
-.Pp
-Note that unlike some other shells,
-.Nm
-executes each process in a pipeline with more than one command
-in a subshell environment and as a child of the
-.Nm
-process.
-.
-.Pp
-If the pipeline is not in the background (discussed later),
-the shell waits for all commands to complete.
-.
-.Pp
-If the keyword
-.Ic !\&
-does not precede the pipeline, the
-exit status is the exit status of the last command specified
-in the pipeline.
-Otherwise, the exit status is the logical
-NOT of the exit status of the last command.
-That is, if
-the last command returns zero, the exit status is 1; if
-the last command returns greater than zero, the exit status
-is zero.
-.
-.Pp
-Because pipeline assignment of standard input or standard
-output or both takes place before redirection, it can be
-modified by redirection.
-For example:
-.Pp
-.Dl "command1 2>&1 | command2"
-.
-.Pp
-sends both the standard output and standard error of
-.Ar command1
-to the standard input of
-.Ar command2 .
-.
-.Pp
-A
-.Ql \&;
-or newline terminator causes the preceding
-AND-OR-list
-(described below in the section called
-.Sx Short-Circuit List Operators )
-to be executed sequentially;
-an
-.Ql &
-causes asynchronous execution of the preceding AND-OR-list.
-.
-.Ss Background Commands (&)
-If a command is terminated by the control operator ampersand
-.Pq Ql & ,
-the shell executes the command in a subshell environment (see
-.Sx Grouping Commands Together
-below) and asynchronously;
-the shell does not wait for the command to finish
-before executing the next command.
-.
-.Pp
-The format for running a command in background is:
-.Pp
-.D1 Ar command1 Li & Op Ar command2 Li & Ar ...
-.
-.Pp
-If the shell is not interactive, the standard input of an
-asynchronous command is set to
-.Pa /dev/null .
-.
-.Pp
-The exit status is zero.
-.
-.Ss Lists (Generally Speaking)
-A list is a sequence of zero or more commands separated by
-newlines, semicolons, or ampersands,
-and optionally terminated by one of these three characters.
-The commands in a
-list are executed in the order they are written.
-If command is followed by an ampersand, the shell starts the
-command and immediately proceeds onto the next command;
-otherwise it waits for the command to terminate before
-proceeding to the next one.
-.
-.Ss Short-Circuit List Operators
-.Dq Li &&
-and
-.Dq Li ||
-are AND-OR list operators.
-.Dq Li &&
-executes the first command, and then executes the second command
-if the exit status of the first command is zero.
-.Dq Li ||
-is similar, but executes the second command if the exit
-status of the first command is nonzero.
-.Dq Li &&
-and
-.Dq Li ||
-both have the same priority.
-.
-.Ss Flow-Control Constructs (if, while, for, case)
-The syntax of the
-.Ic if
-command is:
-.Bd -unfilled -offset indent -compact
-.Ic if Ar list
-.Ic then Ar list
-.Oo Ic elif Ar list
-.Ic then Ar list Oc Ar ...
-.Op Ic else Ar list
-.Ic fi
-.Ed
-.
-.Pp
-The exit status is that of selected
-.Ic then
-or
-.Ic else
-list,
-or zero if no list was selected.
-.
-.Pp
-The syntax of the
-.Ic while
-command is:
-.Bd -unfilled -offset indent -compact
-.Ic while Ar list
-.Ic do Ar list
-.Ic done
-.Ed
-.
-.Pp
-The two lists are executed repeatedly while the exit status of the
-first list is zero.
-The
-.Ic until
-command is similar, but has the word
-.Ic until
-in place of
-.Ic while ,
-which causes it to
-repeat until the exit status of the first list is zero.
-.
-.Pp
-The exit status is that of the last execution of the second list,
-or zero if it was never executed.
-.
-.Pp
-The syntax of the
-.Ic for
-command is:
-.Bd -unfilled -offset indent -compact
-.Ic for Ar variable Op Ic in Ar word ...
-.Ic do Ar list
-.Ic done
-.Ed
-.
-.Pp
-If
-.Ic in
-and the following words are omitted,
-.Ic in Li \&"$@\&"
-is used instead.
-The words are expanded, and then the list is executed
-repeatedly with the variable set to each word in turn.
-The
-.Ic do
-and
-.Ic done
-commands may be replaced with
-.Ql {
-and
-.Ql } .
-.
-.Pp
-The syntax of the
-.Ic break
-and
-.Ic continue
-commands is:
-.D1 Ic break Op Ar num
-.D1 Ic continue Op Ar num
-.
-.Pp
-The
-.Ic break
-command terminates the
-.Ar num
-innermost
-.Ic for
-or
-.Ic while
-loops.
-The
-.Ic continue
-command continues with the next iteration of the innermost loop.
-These are implemented as special built-in commands.
-.
-.Pp
-The syntax of the
-.Ic case
-command is:
-.Bd -unfilled -offset indent -compact
-.Ic case Ar word Ic in
-.Ar pattern ) Ar list Li ;;
-.Ar ...
-.Ic esac
-.Ed
-.
-.Pp
-The pattern can actually be one or more patterns
-(see
-.Sx Shell Patterns
-described later),
-separated by
-.Ql \&|
-characters.
-Tilde expansion, parameter expansion, command substitution,
-arithmetic expansion and quote removal are applied to the word.
-Then, each pattern is expanded in turn using tilde expansion,
-parameter expansion, command substitution and arithmetic expansion and
-the expanded form of the word is checked against it.
-If a match is found, the corresponding list is executed.
-If the selected list is terminated by the control operator
-.Ql ;&
-instead of
-.Ql ;; ,
-execution continues with the next list,
-continuing until a list terminated with
-.Ql ;;
-or the end of the
-.Ic case
-command.
-.
-.Ss Grouping Commands Together
-Commands may be grouped by writing either
-.Pp
-.Sm off
-.Bd -literal -offset -ident
-.Po Ar list Pc
-.Ed
-.Sm on
-.Pp
-or
-.Bd -literal -offset -ident
-.No { Ar list ; }
-.Ed
-.
-.Pp
-The first form executes the commands in a subshell environment.
-A subshell environment has its own copy of:
-.Bl -enum
-.It
-The current working directory as set by
-.Ic cd .
-.It
-The file creation mask as set by
-.Ic umask .
-.It
-Resource limits as set by
-.Ic ulimit .
-.It
-References to open files.
-.It
-Traps as set by
-.Ic trap .
-.It
-Known jobs.
-.It
-Positional parameters and variables.
-.It
-Shell options.
-.It
-Shell functions.
-.It
-Shell aliases.
-.El
-.
-.Pp
-These are copied from the parent shell environment,
-except that trapped (but not ignored) signals are reset to the default action
-and known jobs are cleared.
-Any changes do not affect the parent shell environment.
-.
-.Pp
-A subshell environment may be implemented as a child process or differently.
-If job control is enabled in an interactive shell,
-commands grouped in parentheses can be suspended and continued as a unit.
-.
-.Pp
-For compatibility with other shells,
-two open parentheses in sequence should be separated by whitespace.
-.
-.Pp
-The second form never forks another shell,
-so it is slightly more efficient.
-Grouping commands together this way allows the user to
-redirect their output as though they were one program:
-.Bd -literal -offset indent
-{ echo -n "hello"; echo " world"; } > greeting
-.Ed
-.
-.Ss Functions
-The syntax of a function definition is
-.Pp
-.D1 Ar name Li \&( \&) Ar command
-.
-.Pp
-A function definition is an executable statement; when
-executed it installs a function named
-.Ar name
-and returns an
-exit status of zero.
-The
-.Ar command
-is normally a list
-enclosed between
-.Ql {
-and
-.Ql } .
-.
-.Pp
-Variables may be declared to be local to a function by
-using the
-.Ic local
-command.
-This should appear as the first statement of a function,
-and the syntax is:
-.Pp
-.D1 Ic local Oo Ar variable ... Oc Op Fl
-.
-.Pp
-The
-.Ic local
-command is implemented as a built-in command.
-The exit status is zero
-unless the command is not in a function or a variable name is invalid.
-.
-.Pp
-When a variable is made local, it inherits the initial
-value and exported and readonly flags from the variable
-with the same name in the surrounding scope, if there is
-one.
-Otherwise, the variable is initially unset.
-The shell
-uses dynamic scoping, so that if the variable
-.Va x
-is made local to function
-.Em f ,
-which then calls function
-.Em g ,
-references to the variable
-.Va x
-made inside
-.Em g
-will refer to the variable
-.Va x
-declared inside
-.Em f ,
-not to the global variable named
-.Va x .
-.
-.Pp
-The only special parameter that can be made local is
-.Ql - .
-Making
-.Ql -
-local causes any shell options
-(including those that only have long names)
-that are
-changed via the
-.Ic set
-command inside the function to be
-restored to their original values when the function
-returns.
-.
-.Pp
-The syntax of the
-.Ic return
-command is
-.Pp
-.D1 Ic return Op Ar exitstatus
-.
-.Pp
-It terminates the current executional scope, returning from the closest
-nested function or sourced script;
-if no function or sourced script is being executed,
-it exits the shell instance.
-The
-.Ic return
-command is implemented as a special built-in command.
-.
-.Ss Variables and Parameters
-The shell maintains a set of parameters.
-A parameter
-denoted by a name
-(consisting solely
-of alphabetics, numerics, and underscores,
-and starting with an alphabetic or an underscore)
-is called a variable.
-When starting up,
-the shell turns all environment variables with valid names into shell
-variables.
-New variables can be set using the form
-.Pp
-.D1 Ar name Ns = Ns Ar value
-.
-.Pp
-A parameter can also be denoted by a number
-or a special character as explained below.
-.
-.Pp
-Assignments are expanded differently from other words:
-tilde expansion is also performed after the equals sign and after any colon
-and usernames are also terminated by colons,
-and field splitting and pathname expansion are not performed.
-.
-.Pp
-This special expansion applies not only to assignments that form a simple
-command by themselves or precede a command word,
-but also to words passed to the
-.Ic export ,
-.Ic local
-or
-.Ic readonly
-built-in commands that have this form.
-For this, the builtin's name must be literal
-(not the result of an expansion)
-and may optionally be preceded by one or more literal instances of
-.Ic command
-without options.
-.
-.Ss Positional Parameters
-A positional parameter is a parameter denoted by a number greater than zero.
-The shell sets these initially to the values of its command line
-arguments that follow the name of the shell script.
-The
-.Ic set
-built-in command can also be used to set or reset them.
-.
-.Ss Special Parameters
-Special parameters are parameters denoted by a single special character
-or the digit zero.
-They are shown in the following list, exactly as they would appear in input
-typed by the user or in the source of a shell script.
-.
-.Bl -hang
-.It Li $*
-Expands to the positional parameters, starting from one.
-When
-the expansion occurs within a double-quoted string
-it expands to a single field with the value of each parameter
-separated by the first character of the
-.Va IFS
-variable,
-or by a space if
-.Va IFS
-is unset.
-.
-.It Li $@
-Expands to the positional parameters, starting from one.
-When
-the expansion occurs within double-quotes, each positional
-parameter expands as a separate argument.
-If there are no positional parameters, the
-expansion of
-.Li @
-generates zero arguments, even when
-.Li @
-is double-quoted.
-What this basically means, for example, is
-if
-.Li $1
-is
-.Dq Li abc
-and
-.Li $2
-is
-.Dq Li "def ghi" ,
-then
-.Li \&"$@\&"
-expands to
-the two arguments:
-.Bd -literal -offset indent
-"abc"   "def ghi"
-.Ed
-.
-.It Li $#
-Expands to the number of positional parameters.
-.
-.It Li $?
-Expands to the exit status of the most recent pipeline.
-.
-.It Li $-
-(hyphen) Expands to the current option flags (the single-letter
-option names concatenated into a string) as specified on
-invocation, by the
-.Ic set
-built-in command, or implicitly
-by the shell.
-.
-.It Li $$
-Expands to the process ID of the invoked shell.
-A subshell
-retains the same value of
-.Va $
-as its parent.
-.
-.It Li $!
-Expands to the process ID of the most recent background
-command executed from the current shell.
-For a
-pipeline, the process ID is that of the last command in the
-pipeline.
-If this parameter is referenced, the shell will remember
-the process ID and its exit status until the
-.Ic wait
-built-in command reports completion of the process.
-.
-.It Li $0
-(zero) Expands to the name of the shell script if passed on the command line,
-the
-.Ar name
-operand if given (with
-.Fl c )
-or otherwise argument 0 passed to the shell.
-.El
-.
-.Ss Special Variables
-The following variables are set by the shell or
-have special meaning to it:
-.
-.Bl -tag -width ".Va HISTSIZE"
-.It Va CDPATH
-The search path used with the
-.Ic cd
-built-in.
-.
-.It Va EDITOR
-The fallback editor used with the
-.Ic fc
-built-in.
-If not set, the default editor is
-.Xr ed 1 .
-.
-.It Va FCEDIT
-The default editor used with the
-.Ic fc
-built-in.
-.
-.It Va HISTFILE
-The path to the file in which command history is saved.
-History is loaded when
-.Va HISTFILE
-is set and saved on exit.
-.
-.It Va HISTSIZE
-The number of previous commands that are accessible.
-.
-.It Va HOME
-The user's home directory,
-used in tilde expansion and as a default directory for the
-.Ic cd
-built-in.
-.
-.It Va IFS
-Input Field Separators.
-This is initialized at startup to
-.Aq space ,
-.Aq tab ,
-and
-.Aq newline
-in that order.
-This value also applies if
-.Va IFS
-is unset, but not if it is set to the empty string.
-See the
-.Sx White Space Splitting
-section for more details.
-.
-.It Va LINENO
-The current line number in the script or function.
-.
-.It Va MAIL
-The name of a mail file, that will be checked for the arrival of new
-mail.
-Overridden by
-.Va MAILPATH .
-.
-.It Va MAILPATH
-A colon
-.Pq Ql \&:
-separated list of file names, for the shell to check for incoming
-mail.
-This variable overrides the
-.Va MAIL
-setting.
-There is a maximum of 10 mailboxes that can be monitored at once.
-.
-.It Va OPTIND
-The index of the next argument to be processed by
-.Ic getopts .
-This is initialized to 1 at startup.
-.
-.It Va PATH
-The default search path for executables.
-See the
-.Sx Path Search
-section for details.
-.
-.It Va PPID
-The parent process ID of the invoked shell.
-This is set at startup
-unless this variable is in the environment.
-A later change of parent process ID is not reflected.
-A subshell retains the same value of
-.Va PPID .
-.
-.It Va PS0
-The pre-prompt string,
-which is printed before each new prompt.
-.Va PS0
-may include any of the formatting sequences from
-.Va PS1 .
-.
-.It Va PS1
-The primary prompt string, which defaults to
-.Dq Li "\e$ " .
-.Va PS1
-may include any of the following formatting sequences,
-which are replaced by the given information:
-.Bl -tag -width indent
-.It Li \eH
-This system's fully-qualified hostname (FQDN).
-.It Li \eh
-This system's hostname.
-.It Li \eW
-The final component of the current working directory.
-.It Li \ew
-The entire path of the current working directory.
-.It Li \e?
-Exit status if it is non-zero, empty string otherwise.
-.It Li \e$
-Superuser status.
-.Dq Li "$ "
-for normal users and
-.Dq Li "# "
-for superusers.
-.It Li \e\e
-A literal backslash.
-.El
-.
-.It Va PS2
-The secondary prompt string, which defaults to
-.Dq Li "> " .
-.Va PS2
-may include any of the formatting sequences from
-.Va PS1 .
-.
-.It Va PS4
-The prefix for the trace output (if
-.Fl x
-is active).
-The default is
-.Dq Li "+ " .
-.
-.It Va RPS1
-The primary right prompt string.
-.Va RPS1
-may include any of the formatting sequences from
-.Va PS1 .
-.
-.It Va RPS2
-The secondary right prompt string.
-.Va RPS2
-may include any of the formatting sequences from
-.Va PS1 .
-.El
-.
-.Ss Word Expansions
-This clause describes the various expansions that are
-performed on words.
-Not all expansions are performed on
-every word, as explained later.
-.
-.Pp
-Tilde expansions, parameter expansions, command substitutions,
-arithmetic expansions, and quote removals that occur within
-a single word expand to a single field.
-It is only field
-splitting or pathname expansion that can create multiple
-fields from a single word.
-The single exception to this rule is
-the expansion of the special parameter
-.Va @
-within double-quotes,
-as was described above.
-.
-.Pp
-The order of word expansion is:
-.Bl -enum
-.It
-Tilde Expansion, Parameter Expansion, Command Substitution,
-Arithmetic Expansion (these all occur at the same time).
-.It
-Field Splitting is performed on fields generated by step (1)
-unless the
-.Va IFS
-variable is null.
-.It
-Pathname Expansion (unless the
-.Fl f
-option is in effect).
-.It
-Quote Removal.
-.El
-.
-.Pp
-The
-.Ql $
-character is used to introduce parameter expansion, command
-substitution, or arithmetic expansion.
-.
-.Ss Tilde Expansion (substituting a user's home directory)
-A word beginning with an unquoted tilde character
-.Pq Ql ~
-is
-subjected to tilde expansion.
-All the characters up to a slash
-.Pq Ql /
-or the end of the word are treated as a username
-and are replaced with the user's home directory.
-If the
-username is missing (as in
-.Pa ~/foobar ) ,
-the tilde is replaced with the value of the
-.Va HOME
-variable (the current user's home directory).
-.
-.Ss Parameter Expansion
-The format for parameter expansion is as follows:
-.Pp
-.D1 Li ${ Ns Ar expression Ns Li }
-.Pp
-where
-.Ar expression
-consists of all characters until the matching
-.Ql } .
-Any
-.Ql }
-escaped by a backslash or within a single-quoted or double-quoted
-string, and characters in
-embedded arithmetic expansions, command substitutions, and variable
-expansions, are not examined in determining the matching
-.Ql } .
-If the variants with
-.Ql + ,
-.Ql - ,
-.Ql =
-or
-.Ql ?\&
-occur within a double-quoted string,
-as an extension there may be unquoted parts
-(via double-quotes inside the expansion);
-.Ql }
-within such parts are also not examined in determining the matching
-.Ql } .
-.
-.Pp
-The simplest form for parameter expansion is:
-.Pp
-.D1 Li ${ Ns Ar parameter Ns Li }
-.Pp
-The value, if any, of
-.Ar parameter
-is substituted.
-.
-.Pp
-The parameter name or symbol can be enclosed in braces, which are
-optional except for positional parameters with more than one digit or
-when parameter is followed by a character that could be interpreted as
-part of the name.
-If a parameter expansion occurs inside double-quotes:
-.Bl -enum
-.It
-Field splitting is not performed on the results of the
-expansion, with the exception of the special parameter
-.Va @ .
-.It
-Pathname expansion is not performed on the results of the
-expansion.
-.El
-.
-.Pp
-In addition, a parameter expansion can be modified by using one of the
-following formats.
-.
-.Bl -tag -width indent
-.It Li ${ Ns Ar parameter Ns Li :- Ns Ar word Ns Li }
-Use Default Values.
-If
-.Ar parameter
-is unset or null, the expansion of
-.Ar word
-is substituted; otherwise, the value of
-.Ar parameter
-is substituted.
-.
-.It Li ${ Ns Ar parameter Ns Li := Ns Ar word Ns Li }
-Assign Default Values.
-If
-.Ar parameter
-is unset or null, the expansion of
-.Ar word
-is assigned to
-.Ar parameter .
-In all cases, the
-final value of
-.Ar parameter
-is substituted.
-Quoting inside
-.Ar word
-does not prevent field splitting or pathname expansion.
-Only variables, not positional
-parameters or special parameters, can be
-assigned in this way.
-.
-.It Li ${ Ns Ar parameter Ns Li :? Ns Oo Ar word Oc Ns Li }
-Indicate Error if Null or Unset.
-If
-.Ar parameter
-is unset or null, the expansion of
-.Ar word
-(or a message indicating it is unset if
-.Ar word
-is omitted) is written to standard
-error and the shell exits with a nonzero
-exit status.
-Otherwise, the value of
-.Ar parameter
-is substituted.
-An
-interactive shell need not exit.
-.
-.It Li ${ Ns Ar parameter Ns Li :+ Ns Ar word Ns Li }
-Use Alternate Value.
-If
-.Ar parameter
-is unset or null, null is substituted;
-otherwise, the expansion of
-.Ar word
-is substituted.
-.El
-.
-.Pp
-In the parameter expansions shown previously, use of the colon in the
-format results in a test for a parameter that is unset or null; omission
-of the colon results in a test for a parameter that is only unset.
-.
-.Pp
-The
-.Ar word
-inherits the type of quoting
-(unquoted, double-quoted or here-document)
-from the surroundings,
-with the exception that a backslash that quotes a closing brace is removed
-during quote removal.
-.Bl -tag -width indent
-.It Li ${# Ns Ar parameter Ns Li }
-String Length.
-The length in characters of
-the value of
-.Ar parameter .
-.El
-.
-.Pp
-The following four varieties of parameter expansion provide for substring
-processing.
-In each case, pattern matching notation
-(see
-.Sx Shell Patterns ) ,
-rather than regular expression notation,
-is used to evaluate the patterns.
-If parameter is one of the special parameters
-.Va *
-or
-.Va @ ,
-the result of the expansion is unspecified.
-Enclosing the full parameter expansion string in double-quotes does not
-cause the following four varieties of pattern characters to be quoted,
-whereas quoting characters within the braces has this effect.
-.
-.Bl -tag -width indent
-.It Li ${ Ns Ar parameter Ns Li % Ns Ar word Ns Li }
-Remove Smallest Suffix Pattern.
-The
-.Ar word
-is expanded to produce a pattern.
-The
-parameter expansion then results in
-.Ar parameter ,
-with the smallest portion of the
-suffix matched by the pattern deleted.
-.
-.It Li ${ Ns Ar parameter Ns Li %% Ns Ar word Ns Li }
-Remove Largest Suffix Pattern.
-The
-.Ar word
-is expanded to produce a pattern.
-The
-parameter expansion then results in
-.Ar parameter ,
-with the largest portion of the
-suffix matched by the pattern deleted.
-.
-.It Li ${ Ns Ar parameter Ns Li # Ns Ar word Ns Li }
-Remove Smallest Prefix Pattern.
-The
-.Ar word
-is expanded to produce a pattern.
-The
-parameter expansion then results in
-.Ar parameter ,
-with the smallest portion of the
-prefix matched by the pattern deleted.
-.
-.It Li ${ Ns Ar parameter Ns Li ## Ns Ar word Ns Li }
-Remove Largest Prefix Pattern.
-The
-.Ar word
-is expanded to produce a pattern.
-The
-parameter expansion then results in
-.Ar parameter ,
-with the largest portion of the
-prefix matched by the pattern deleted.
-.El
-.
-.Ss Command Substitution
-Command substitution allows the output of a command to be substituted in
-place of the command name itself.
-Command substitution occurs when
-the command is enclosed as follows:
-.Pp
-.D1 Li $( Ns Ar command Ns Li )\&
-.Pp
-or the backquoted version:
-.Pp
-.D1 Li ` Ns Ar command Ns Li `
-.
-.Pp
-The shell expands the command substitution by executing command
-and replacing the command substitution
-with the standard output of the command,
-removing sequences of one or more newlines at the end of the substitution.
-Embedded newlines before the end of the output are not removed;
-however, during field splitting, they may be translated into spaces
-depending on the value of
-.Va IFS
-and the quoting that is in effect.
-The command is executed in a subshell environment,
-except that the built-in commands
-.Ic jobid ,
-.Ic jobs ,
-and
-.Ic trap
-return information about the parent shell environment
-and
-.Ic times
-returns information about the same process
-if they are the only command in a command substitution.
-.
-.Pp
-If a command substitution of the
-.Li $(
-form begins with a subshell,
-the
-.Li $(
-and
-.Li (\&
-must be separated by whitespace
-to avoid ambiguity with arithmetic expansion.
-.
-.Ss Arithmetic Expansion
-Arithmetic expansion provides a mechanism for evaluating an arithmetic
-expression and substituting its value.
-The format for arithmetic expansion is as follows:
-.Pp
-.D1 Li $(( Ns Ar expression Ns Li ))
-.
-.Pp
-The
-.Ar expression
-is treated as if it were in double-quotes, except
-that a double-quote inside the expression is not treated specially.
-The
-shell expands all tokens in the
-.Ar expression
-for parameter expansion,
-command substitution,
-arithmetic expansion
-and quote removal.
-.
-.Pp
-The allowed expressions are a subset of C expressions,
-summarized below.
-.
-.Bl -tag -width "Variables" -offset indent
-.It Values
-All values are of type
-.Ft intmax_t .
-.
-.It Constants
-Decimal, octal (starting with
-.Li 0 )
-and hexadecimal (starting with
-.Li 0x )
-integer constants.
-.
-.It Variables
-Shell variables can be read and written
-and contain integer constants.
-.
-.It Unary operators
-.Li "! ~ + -"
-.
-.It Binary operators
-.Li "* / % + - << >> < <= > >= == != & ^ | && ||"\&
-.
-.It Assignment operators
-.Li "= += -= *= /= %= <<= >>= &= ^= |="
-.
-.It Conditional operator
-.Li "? :"\&
-.El
-.
-.Pp
-The result of the expression is substituted in decimal.
-.
-.Ss White Space Splitting (Field Splitting)
-In certain contexts,
-after parameter expansion, command substitution, and
-arithmetic expansion the shell scans the results of
-expansions and substitutions that did not occur in double-quotes for
-field splitting and multiple fields can result.
-.
-.Pp
-Characters in
-.Va IFS
-that are whitespace
-.Po
-.Aq space ,
-.Aq tab ,
-and
-.Aq newline
-.Pc
-are treated differently from other characters in
-.Va IFS .
-.
-.Pp
-Whitespace in
-.Va IFS
-at the beginning or end of a word is discarded.
-.
-.Pp
-Subsequently, a field is delimited by either
-.Bl -enum
-.It
-a non-whitespace character in
-.Va IFS
-with any whitespace in
-.Va IFS
-surrounding it, or
-.It
-one or more whitespace characters in
-.Va IFS .
-.El
-.
-.Pp
-If a word ends with a non-whitespace character in
-.Va IFS ,
-there is no empty field after this character.
-.
-.Pp
-If no field is delimited, the word is discarded.
-In particular, if a word consists solely of an unquoted substitution
-and the result of the substitution is null,
-it is removed by field splitting even if
-.Va IFS
-is null.
-.
-.Ss Pathname Expansion (File Name Generation)
-Unless the
-.Fl f
-option is set,
-file name generation is performed
-after word splitting is complete.
-Each word is
-viewed as a series of patterns, separated by slashes.
-The
-process of expansion replaces the word with the names of
-all existing files whose names can be formed by replacing
-each pattern with a string that matches the specified pattern.
-There are two restrictions on this: first, a pattern cannot match
-a string containing a slash, and second,
-a pattern cannot match a string starting with a period
-unless the first character of the pattern is a period.
-The next section describes the patterns used for
-Pathname Expansion,
-the four varieties of parameter expansion for substring processing and the
-.Ic case
-command.
-.
-.Ss Shell Patterns
-A pattern consists of normal characters, which match themselves,
-and meta-characters.
-The meta-characters are
-.Ql * ,
-.Ql \&? ,
-and
-.Ql \&[ .
-These characters lose their special meanings if they are quoted.
-When command or variable substitution is performed and the dollar sign
-or back quotes are not double-quoted, the value of the
-variable or the output of the command is scanned for these
-characters and they are turned into meta-characters.
-.
-.Pp
-An asterisk
-.Pq Ql *
-matches any string of characters.
-A question mark
-.Pq Ql \&?
-matches any single character.
-A left bracket
-.Pq Ql \&[
-introduces a character class.
-The end of the character class is indicated by a
-.Ql \&] ;
-if the
-.Ql \&]
-is missing then the
-.Ql \&[
-matches a
-.Ql \&[
-rather than introducing a character class.
-A character class matches any of the characters between the square brackets.
-A locale-dependent range of characters may be specified using a minus sign.
-A named class of characters (see
-.Xr wctype 3 )
-may be specified by surrounding the name with
-.Ql \&[:\&
-and
-.Ql :\&] .
-For example,
-.Ql \&[\&[:alpha:\&]\&]
-is a shell pattern that matches a single letter.
-The character class may be complemented by making an exclamation point
-.Pq Ql !\&
-the first character of the character class.
-A caret
-.Pq Ql ^
-has the same effect but is non-standard.
-.
-.Pp
-To include a
-.Ql \&]
-in a character class, make it the first character listed
-(after the
-.Ql \&!
-or
-.Ql ^ ,
-if any).
-To include a
-.Ql - ,
-make it the first or last character listed.
-.
-.Ss Built-in Commands
-This section lists the built-in commands.
-.Bl -tag -width indent
-.It Ic \&:
-A null command that returns a 0 (true) exit value.
-.
-.It Ic \&. Ar file
-The commands in the specified file are read and executed by the shell.
-The
-.Ic return
-command may be used to return to the
-.Ic \&.
-command's caller.
-If
-.Ar file
-contains any
-.Ql /
-characters, it is used as is.
-Otherwise, the shell searches the
-.Va PATH
-for the file.
-If it is not found in the
-.Va PATH ,
-it is sought in the current working directory.
-.
-.It Ic \&[
-A built-in equivalent of
-.Xr test 1 .
-This version is documented in
-.Xr 1sh-test 1 .
-.
-.It Ic alias Oo Ar name Ns Oo = Ns Ar string Oc ... Oc
-If
-.Ar name Ns = Ns Ar string
-is specified, the shell defines the alias
-.Ar name
-with value
-.Ar string .
-If just
-.Ar name
-is specified, the value of the alias
-.Ar name
-is printed.
-With no arguments, the
-.Ic alias
-built-in command prints the names and values of all defined aliases
-(see
-.Ic unalias ) .
-Alias values are written with appropriate quoting so that they are
-suitable for re-input to the shell.
-Also see the
-.Sx Aliases
-subsection.
-.
-.It Ic bg Op Ar job ...
-Continue the specified jobs
-(or the current job if no jobs are given)
-in the background.
-.
-.It Ic bind Oo Fl aeklrsv Oc Oo Ar key Oo Ar command Oc Oc
-List or alter key bindings for the line editor.
-This command is documented in
-.Xr editrc 5 .
-.
-.It Ic break Op Ar num
-See the
-.Sx Flow-Control Constructs
-subsection.
-.
-.It Ic builtin Ar cmd Op Ar arg ...
-Execute the specified built-in command,
-.Ar cmd .
-This is useful when the user wishes to override a shell function
-with the same name as a built-in command.
-.
-.It Ic cd Oo Fl L | P Oc Oo Fl e Oc Op Ar directory
-.It Ic cd Fl
-Switch to the specified
-.Ar directory ,
-to the directory specified in the
-.Va HOME
-environment variable if no
-.Ar directory
-is specified or
-to the directory specified in the
-.Va OLDPWD
-environment variable if
-.Ar directory
-is
-.Fl .
-If
-.Ar directory
-does not begin with
-.Pa / , \&. ,
-or
-.Pa .. ,
-then the directories listed in the
-.Va CDPATH
-variable will be
-searched for the specified
-.Ar directory .
-If
-.Va CDPATH
-is unset, the current directory is searched.
-The format of
-.Va CDPATH
-is the same as that of
-.Va PATH .
-In an interactive shell,
-the
-.Ic cd
-command will print out the name of the directory
-that it actually switched to
-if the
-.Va CDPATH
-mechanism was used or if
-.Ar directory
-was
-.Fl .
-.
-.Pp
-If the
-.Fl P
-option is specified,
-.Pa ..
-is handled physically and symbolic links are resolved before
-.Pa ..
-components are processed.
-If the
-.Fl L
-option is specified,
-.Pa ..
-is handled logically.
-This is the default.
-.
-.Pp
-The
-.Fl e
-option causes
-.Ic cd
-to return exit status 1 if the full pathname of the new directory
-cannot be determined reliably or at all.
-Normally this is not considered an error,
-although a warning is printed.
-.
-.Pp
-If changing the directory fails, the exit status is greater than 1.
-If the directory is changed, the exit status is 0, or also 1 if
-.Fl e
-was given.
-.
-.It Ic chdir
-A synonym for the
-.Ic cd
-built-in command.
-.
-.It Ic command Oo Fl p Oc Op Ar utility Op Ar argument ...
-.It Ic command Oo Fl p Oc Fl v Ar utility
-.It Ic command Oo Fl p Oc Fl V Ar utility
-The first form of invocation executes the specified
-.Ar utility ,
-ignoring shell functions in the search.
-If
-.Ar utility
-is a special builtin,
-it is executed as if it were a regular builtin.
-.
-.Pp
-If the
-.Fl p
-option is specified, the command search is performed using a
-default value of
-.Va PATH
-that is guaranteed to find all of the standard utilities.
-.
-.Pp
-If the
-.Fl v
-option is specified,
-.Ar utility
-is not executed but a description of its interpretation by the shell is
-printed.
-For ordinary commands the output is the path name; for shell built-in
-commands, shell functions and keywords only the name is written.
-Aliases are printed as
-.Dq Ic alias Ar name Ns = Ns Ar value .
-.
-.Pp
-The
-.Fl V
-option is identical to
-.Fl v
-except for the output.
-It prints
-.Dq Ar utility Ic is Ar description
-where
-.Ar description
-is either
-the path name to
-.Ar utility ,
-a special shell builtin,
-a shell builtin,
-a shell function,
-a shell keyword
-or
-an alias for
-.Ar value .
-.
-.It Ic continue Op Ar num
-See the
-.Sx Flow-Control Constructs
-subsection.
-.
-.It Ic echo Oo Fl e | n Oc Op Ar string ...
-Print a space-separated list of the arguments to the standard output
-and append a newline character.
-.Bl -tag -width indent
-.It Fl n
-Suppress the output of the trailing newline.
-.It Fl e
-Process C-style backslash escape sequences.
-The
-.Ic echo
-command understands the following character escapes:
-.Bl -tag -width indent
-.It \ea
-Alert (ring the terminal bell)
-.It \eb
-Backspace
-.It \ec
-Suppress the trailing newline (this has the side-effect of truncating the
-line if it is not the last character)
-.It \ee
-The ESC character (ASCII 0x1b)
-.It \ef
-Formfeed
-.It \en
-Newline
-.It \er
-Carriage return
-.It \et
-Horizontal tab
-.It \ev
-Vertical tab
-.It \e\e
-Literal backslash
-.It \e0nnn
-(Zero) The character whose octal value is
-.Ar nnn
-.El
-.
-.Pp
-If
-.Ar string
-is not enclosed in quotes then the backslash itself must be escaped
-with a backslash to protect it from the shell.
-For example
-.Bd -literal -offset indent
-$ echo -e "a\evb"
-a
- b
-$ echo -e a\e\evb
-a
- b
-$ echo -e "a\e\eb"
-a\eb
-$ echo -e a\e\e\e\eb
-a\eb
-.Ed
-.El
-.
-.Pp
-Only one of the
-.Fl e
-and
-.Fl n
-options may be specified.
-.
-.It Ic eval Ar string ...
-Concatenate all the arguments with spaces.
-Then re-parse and execute the command.
-.
-.It Ic exec Op Ar command Op arg ...
-Unless
-.Ar command
-is omitted,
-the shell process is replaced with the specified program
-(which must be a real program, not a shell built-in command or function).
-Any redirections on the
-.Ic exec
-command are marked as permanent,
-so that they are not undone when the
-.Ic exec
-command finishes.
-.
-.It Ic exit Op Ar exitstatus
-Terminate the shell process.
-If
-.Ar exitstatus
-is given
-it is used as the exit status of the shell.
-Otherwise, if the shell is executing an
-.Cm EXIT
-trap, the exit status of the last command before the trap is used;
-if the shell is executing a trap for a signal,
-the shell exits by resending the signal to itself.
-Otherwise, the exit status of the preceding command is used.
-The exit status should be an integer between 0 and 255.
-.
-.It Ic export Ar name ...
-.It Ic export Op Fl p
-The specified names are exported so that they will
-appear in the environment of subsequent commands.
-The only way to un-export a variable is to
-.Ic unset
-it.
-The shell allows the value of a variable to be set
-at the same time as it is exported by writing
-.Pp
-.D1 Ic export Ar name Ns = Ns Ar value
-.Pp
-With no arguments the
-.Ic export
-command lists the names
-of all exported variables.
-If the
-.Fl p
-option is specified, the exported variables are printed as
-.Dq Ic export Ar name Ns = Ns Ar value
-lines, suitable for re-input to the shell.
-.
-.It Ic false
-A null command that returns a non-zero (false) exit value.
-.
-.It Ic fc Oo Fl e Ar editor Oc Op Ar first Op Ar last
-.It Ic fc Fl l Oo Fl nr Oc Op Ar first Op Ar last
-.It Ic fc Fl s Oo Ar old Ns = Ns Ar new Oc Op Ar first
-The
-.Ic fc
-built-in command lists, or edits and re-executes,
-commands previously entered to an interactive shell.
-.
-.Bl -tag -width indent
-.It Fl e Ar editor
-Use the editor named by
-.Ar editor
-to edit the commands.
-The
-.Ar editor
-string is a command name,
-subject to search via the
-.Va PATH
-variable.
-The value in the
-.Va FCEDIT
-variable is used as a default when
-.Fl e
-is not specified.
-If
-.Va FCEDIT
-is null or unset, the value of the
-.Va EDITOR
-variable is used.
-If
-.Va EDITOR
-is null or unset,
-.Xr ed 1
-is used as the editor.
-.
-.It Fl l No (ell)
-List the commands rather than invoking
-an editor on them.
-The commands are written in the
-sequence indicated by the
-.Ar first
-and
-.Ar last
-operands, as affected by
-.Fl r ,
-with each command preceded by the command number.
-.
-.It Fl n
-Suppress command numbers when listing with
-.Fl l .
-.
-.It Fl r
-Reverse the order of the commands listed
-(with
-.Fl l )
-or edited
-(with neither
-.Fl l
-nor
-.Fl s ) .
-.
-.It Fl s
-Re-execute the command without invoking an editor.
-.
-.It Ar old Ns = Ns Ar new
-Replace the first occurrence of
-.Ar old
-in the command with
-.Ar new .
-If
-.Ar old
-is the empty string,
-the command is prefixed with
-.Ar new .
-.
-.It Ar first
-.It Ar last
-Select the commands to list or edit.
-The number of previous commands that can be accessed
-are determined by the value of the
-.Va HISTSIZE
-variable.
-The value of
-.Ar first
-or
-.Ar last
-or both are one of the following:
-.
-.Bl -tag -width indent
-.It Oo Cm + Oc Ns Ar num
-A positive number representing a command number;
-command numbers can be displayed with the
-.Fl l
-option.
-.
-.It Fl Ar num
-A negative decimal number representing the
-command that was executed
-.Ar num
-of
-commands previously.
-For example, \-1 is the immediately previous command.
-.
-.It Ar string
-A string indicating the most recently entered command
-that begins with that string.
-If the
-.Ar old Ns = Ns Ar new
-operand is not also specified with
-.Fl s ,
-the string form of the first operand cannot contain an embedded equal sign.
-.El
-.El
-.
-.Pp
-The following variables affect the execution of
-.Ic fc :
-.Bl -tag -width ".Va HISTSIZE"
-.It Va FCEDIT
-Name of the editor to use for history editing.
-.It Va HISTSIZE
-The number of previous commands that are accessible.
-.El
-.
-.It Ic fg Op Ar job
-Move the specified
-.Ar job
-or the current job to the foreground.
-.
-.It Ic getopts Ar optstring var
-The POSIX
-.Ic getopts
-command.
-The
-.Ic getopts
-command deprecates the older
-.Xr getopt 1
-command.
-The first argument should be a series of letters, each possibly
-followed by a colon which indicates that the option takes an argument.
-The specified variable is set to the parsed option.
-The index of
-the next argument is placed into the shell variable
-.Va OPTIND .
-If an option takes an argument, it is placed into the shell variable
-.Va OPTARG .
-If an invalid option is encountered,
-.Ar var
-is set to
-.Ql \&? .
-It returns a false value (1) when it encounters the end of the options.
-A new set of arguments may be parsed by assigning
-.Li OPTIND=1 .
-.
-.It Ic hash Oo Fl rv Oc Op Ar command ...
-The shell maintains a hash table which remembers the locations of commands.
-With no arguments whatsoever, the
-.Ic hash
-command prints out the contents of this table.
-.
-.Pp
-With arguments, the
-.Ic hash
-command removes each specified
-.Ar command
-from the hash table (unless they are functions) and then locates it.
-With the
-.Fl v
-option,
-.Ic hash
-prints the locations of the commands as it finds them.
-The
-.Fl r
-option causes the
-.Ic hash
-command to delete all the entries in the hash table except for functions.
-.
-.It Ic jobid Op Ar job
-Print the process IDs of the processes in the specified
-.Ar job .
-If the
-.Ar job
-argument is omitted, use the current job.
-.
-.It Ic jobs Oo Fl lps Oc Op Ar job ...
-Print information about the specified jobs, or all jobs if no
-.Ar job
-argument is given.
-The information printed includes job ID, status and command name.
-.
-.Pp
-If the
-.Fl l
-option is specified, the PID of each job is also printed.
-If the
-.Fl p
-option is specified, only the process IDs for the process group leaders
-are printed, one per line.
-If the
-.Fl s
-option is specified, only the PIDs of the job commands are printed, one per
-line.
-.
-.It Ic kill
-A built-in equivalent of
-.Xr kill 1
-that additionally supports sending signals to jobs.
-This version is documented in
-.Xr 1sh-kill 1 .
-.
-.It Ic local Oo Ar variable ... Oc Op Fl
-See the
-.Sx Functions
-subsection.
-.
-.It Ic printf
-A built-in equivalent of
-.Xr printf 1 .
-This version is documented in
-.Xr 1sh-printf 1 .
-.
-.It Ic pwd Op Fl L | P
-Print the path of the current directory.
-The built-in command may
-differ from the program of the same name because the
-built-in command remembers what the current directory
-is rather than recomputing it each time.
-This makes
-it faster.
-However, if the current directory is
-renamed,
-the built-in version of
-.Xr pwd 1
-will continue to print the old name for the directory.
-.
-.Pp
-If the
-.Fl P
-option is specified, symbolic links are resolved.
-If the
-.Fl L
-option is specified, the shell's notion of the current directory
-is printed (symbolic links are not resolved).
-This is the default.
-.
-.It Ic read Oo Fl p Ar prompt Oc Oo
-.Fl t Ar timeout Oc Oo Fl er Oc Ar variable ...
-The
-.Ar prompt
-is printed if the
-.Fl p
-option is specified
-and the standard input is a terminal.
-Then a line is
-read from the standard input.
-The trailing newline
-is deleted from the line and the line is split as
-described in the section on
-.Sx White Space Splitting (Field Splitting)\&
-above, and
-the pieces are assigned to the variables in order.
-If there are more pieces than variables, the remaining
-pieces (along with the characters in
-.Va IFS
-that separated them)
-are assigned to the last variable.
-If there are more variables than pieces, the remaining
-variables are assigned the null string.
-.
-.Pp
-Backslashes are treated specially, unless the
-.Fl r
-option is
-specified.
-If a backslash is followed by
-a newline, the backslash and the newline will be
-deleted.
-If a backslash is followed by any other
-character, the backslash will be deleted and the following
-character will be treated as though it were not in
-.Va IFS ,
-even if it is.
-.
-.Pp
-If the
-.Fl t
-option is specified and the
-.Ar timeout
-elapses before a complete line of input is supplied,
-the
-.Ic read
-command will return an exit status as if terminated by
-.Dv SIGALRM
-without assigning any values.
-The
-.Ar timeout
-value may optionally be followed by one of
-.Ql s ,
-.Ql m
-or
-.Ql h
-to explicitly specify seconds, minutes or hours.
-If none is supplied,
-.Ql s
-is assumed.
-.
-.Pp
-The
-.Fl e
-option exists only for backward compatibility with older scripts.
-.
-.Pp
-The exit status is 0 on success, 1 on end of file,
-between 2 and 128 if an error occurs
-and greater than 128 if a trapped signal interrupts
-.Ic read .
-.
-.It Ic readonly Oo Fl p Oc Op Ar name ...
-Each specified
-.Ar name
-is marked as read only,
-so that it cannot be subsequently modified or unset.
-The shell allows the value of a variable to be set
-at the same time as it is marked read only
-by using the following form:
-.Pp
-.D1 Ic readonly Ar name Ns = Ns Ar value
-.Pp
-With no arguments the
-.Ic readonly
-command lists the names of all read only variables.
-If the
-.Fl p
-option is specified, the read-only variables are printed as
-.Dq Ic readonly Ar name Ns = Ns Ar value
-lines, suitable for re-input to the shell.
-.
-.It Ic return Op Ar exitstatus
-See the
-.Sx Functions
-subsection.
-.
-.It Ic set Oo Fl /+abCEefIimnpTuVvx Oc Oo Fl /+o Ar longname Oc Oo
-.Fl c Ar string Oc Op Fl - Ar arg ...
-The
-.Ic set
-command performs three different functions:
-.
-.Bl -item
-.It
-With no arguments, it lists the values of all shell variables.
-.
-.It
-If options are given,
-either in short form or using the long
-.Dq Fl /+o Ar longname
-form,
-it sets or clears the specified options as described in the section called
-.Sx Argument List Processing .
-.
-.It
-If the
-.Dq Fl -
-option is specified,
-.Ic set
-will replace the shell's positional parameters with the subsequent
-arguments.
-If no arguments follow the
-.Dq Fl -
-option,
-all the positional parameters will be cleared,
-which is equivalent to executing the command
-.Dq Li "shift $#" .
-The
-.Dq Fl -
-flag may be omitted when specifying arguments to be used
-as positional replacement parameters.
-This is not recommended,
-because the first argument may begin with a dash
-.Pq Ql -
-or a plus
-.Pq Ql + ,
-which the
-.Ic set
-command will interpret as a request to enable or disable options.
-.El
-.
-.It Ic setvar Ar variable value
-Assigns the specified
-.Ar value
-to the specified
-.Ar variable .
-The
-.Ic setvar
-command is intended to be used in functions that
-assign values to variables whose names are passed as parameters.
-In general it is better to write
-.Dq Ar variable Ns = Ns Ar value
-rather than using
-.Ic setvar .
-.
-.It Ic shift Op Ar n
-Shift the positional parameters
-.Ar n
-times, or once if
-.Ar n
-is not specified.
-A shift sets the value of
-.Li $1
-to the value of
-.Li $2 ,
-the value of
-.Li $2
-to the value of
-.Li $3 ,
-and so on,
-decreasing the value of
-.Li $#
-by one.
-For portability, shifting if there are zero positional parameters
-should be avoided, since the shell may abort.
-.
-.It Ic test
-A built-in equivalent of
-.Xr test 1 .
-This version is documented in
-.Xr 1sh-test 1 .
-.
-.It Ic times
-Print the amount of time spent executing the shell process and its children.
-The first output line shows the user and system times for the shell process
-itself, the second one contains the user and system times for the
-children.
-.
-.It Ic trap Oo Ar action Oc Ar signal ...
-.It Ic trap Fl l
-Cause the shell to parse and execute
-.Ar action
-when any specified
-.Ar signal
-is received.
-The signals are specified by name or number.
-In addition, the pseudo-signal
-.Cm EXIT
-may be used to specify an
-.Ar action
-that is performed when the shell terminates.
-The
-.Ar action
-may be an empty string or a dash
-.Pq Ql - ;
-the former causes the specified signal to be ignored
-and the latter causes the default action to be taken.
-Omitting the
-.Ar action
-and using only signal numbers is another way to request the default action.
-In a subshell or utility environment,
-the shell resets trapped (but not ignored) signals to the default action.
-The
-.Ic trap
-command has no effect on signals that were ignored on entry to the shell.
-.
-.Pp
-Option
-.Fl l
-causes the
-.Ic trap
-command to display a list of valid signal names.
-.
-.It Ic true
-A null command that returns a 0 (true) exit value.
-.
-.It Ic type Op Ar name ...
-Interpret each
-.Ar name
-as a command and print the resolution of the command search.
-Possible resolutions are:
-shell keyword, alias, special shell builtin, shell builtin, command,
-tracked alias
-and not found.
-For aliases the alias expansion is printed;
-for commands and tracked aliases
-the complete pathname of the command is printed.
-.
-.It Ic ulimit Oo Fl HSabcdfklmnopstuvw Oc Op Ar limit
-Set or display resource limits (see
-.Xr getrlimit 2 ) .
-If
-.Ar limit
-is specified, the named resource will be set;
-otherwise the current resource value will be displayed.
-.
-.Pp
-If
-.Fl H
-is specified, the hard limits will be set or displayed.
-While everybody is allowed to reduce a hard limit,
-only the superuser can increase it.
-The
-.Fl S
-option
-specifies the soft limits instead.
-When displaying limits,
-only one of
-.Fl S
-or
-.Fl H
-can be given.
-The default is to display the soft limits,
-and to set both the hard and the soft limits.
-.
-.Pp
-Option
-.Fl a
-causes the
-.Ic ulimit
-command to display all resources.
-The parameter
-.Ar limit
-is not acceptable in this mode.
-.
-.Pp
-The remaining options specify which resource value is to be
-displayed or modified.
-They are mutually exclusive.
-.Bl -tag -width indent
-.It Fl b Ar sbsize
-The maximum size of socket buffer usage, in bytes.
-.It Fl c Ar coredumpsize
-The maximal size of core dump files, in 512-byte blocks.
-Setting
-.Ar coredumpsize
-to 0 prevents core dump files from being created.
-.It Fl d Ar datasize
-The maximal size of the data segment of a process, in kilobytes.
-.It Fl f Ar filesize
-The maximal size of a file, in 512-byte blocks.
-.It Fl k Ar kqueues
-The maximal number of kqueues
-(see
-.Xr kqueue 2 )
-for this user ID.
-.It Fl l Ar lockedmem
-The maximal size of memory that can be locked by a process, in
-kilobytes.
-.It Fl m Ar memoryuse
-The maximal resident set size of a process, in kilobytes.
-.It Fl n Ar nofiles
-The maximal number of descriptors that could be opened by a process.
-.It Fl o Ar umtxp
-The maximal number of process-shared locks
-(see
-.Xr pthread 3 )
-for this user ID.
-.It Fl p Ar pseudoterminals
-The maximal number of pseudo-terminals for this user ID.
-.It Fl s Ar stacksize
-The maximal size of the stack segment, in kilobytes.
-.It Fl t Ar time
-The maximal amount of CPU time to be used by each process, in seconds.
-.It Fl u Ar userproc
-The maximal number of simultaneous processes for this user ID.
-.It Fl v Ar virtualmem
-The maximal virtual size of a process, in kilobytes.
-.It Fl w Ar swapuse
-The maximum amount of swap space reserved or used for this user ID,
-in kilobytes.
-.El
-.
-.It Ic umask Oo Fl S Oc Op Ar mask
-Set the file creation mask (see
-.Xr umask 2 )
-to the octal or symbolic (see
-.Xr chmod 1 )
-value specified by
-.Ar mask .
-If the argument is omitted, the current mask value is printed.
-If the
-.Fl S
-option is specified, the output is symbolic, otherwise the output is octal.
-.
-.It Ic unalias Oo Fl a Oc Op Ar name ...
-The specified alias names are removed.
-If
-.Fl a
-is specified, all aliases are removed.
-.
-.It Ic unset Oo Fl fv Oc Ar name ...
-The specified variables or functions are unset and unexported.
-If the
-.Fl v
-option is specified or no options are given, the
-.Ar name
-arguments are treated as variable names.
-If the
-.Fl f
-option is specified, the
-.Ar name
-arguments are treated as function names.
-.
-.It Ic wait Op Ar job ...
-Wait for each specified
-.Ar job
-to complete and return the exit status of the last process in the
-last specified
-.Ar job .
-If any
-.Ar job
-specified is unknown to the shell, it is treated as if it
-were a known job that exited with exit status 127.
-If no operands are given, wait for all jobs to complete
-and return an exit status of zero.
-.El
-.
-.Ss Command Line Editing
-When
-.Nm
-is being used interactively from a terminal, the current command
-and the command history
-(see
-.Ic fc
-in
-.Sx Built-in Commands )
-can be edited using
-.Nm vi Ns -mode
-command line editing.
-This mode uses commands similar
-to a subset of those described in the
-.Xr vi 1
-man page.
-The command
-.Dq Li "set -o vi"
-(or
-.Dq Li "set -V" )
-enables
-.Nm vi Ns -mode
-editing and places
-.Nm
-into
-.Nm vi
-insert mode.
-With
-.Nm vi Ns -mode
-enabled,
-.Nm
-can be switched between insert mode and command mode by typing
-.Aq ESC .
-Hitting
-.Aq return
-while in command mode will pass the line to the shell.
-.
-.Pp
-Similarly, the
-.Dq Li "set -o emacs"
-(or
-.Dq Li "set -E" )
-command can be used to enable a subset of
-.Nm emacs Ns -style
-command line editing features.
-.
-.Sh ENVIRONMENT
-The following environment variables affect the execution of
-.Nm :
-.
-.Bl -tag -width ".Ev LANGXXXXXX"
-.It Ev ENV
-Initialization file for interactive shells.
-.
-.It Ev LANG , Ev LC_*
-Locale settings.
-These are inherited by children of the shell,
-and is used in a limited manner by the shell itself.
-.
-.It Ev OLDPWD
-The previous current directory.
-This is used and updated by
-.Ic cd .
-.
-.It Ev PWD
-An absolute pathname for the current directory,
-possibly containing symbolic links.
-This is used and updated by the shell.
-.
-.It Ev TERM
-The default terminal setting for the shell.
-This is inherited by children of the shell, and is used in the history
-editing modes.
-.El
-.
-.Pp
-Additionally, environment variables are turned into shell variables
-at startup,
-which may affect the shell as described under
-.Sx Special Variables .
-.
-.Sh FILES
-.Bl -tag -width "/etc/suid_profileXX" -compact
-.It Pa ~/.profile
-User's login profile.
-.It Pa /etc/profile
-System login profile.
-.It Pa /etc/shells
-Shell database.
-.It Pa /etc/suid_profile
-Privileged shell profile.
-.El
-.
-.Sh EXIT STATUS
-Errors that are detected by the shell, such as a syntax error, will
-cause the shell to exit with a non-zero exit status.
-If the shell is not an interactive shell, the execution of the shell
-file will be aborted.
-Otherwise the shell will return the exit status of the last command
-executed, or if the
-.Ic exit
-builtin is used with a numeric argument, it
-will return the argument.
-.
-.Sh SEE ALSO
-.Xr 1sh-kill 1 ,
-.Xr 1sh-printf 1 ,
-.Xr 1sh-test 1 ,
-.Xr builtin 1 ,
-.Xr chsh 1 ,
-.Xr echo 1 ,
-.Xr ed 1 ,
-.Xr emacs 1 ,
-.Xr pwd 1 ,
-.Xr vi 1 ,
-.Xr execve 2 ,
-.Xr getrlimit 2 ,
-.Xr umask 2 ,
-.Xr wctype 3 ,
-.Xr editrc 5 ,
-.Xr shells 5
-.
-.Sh HISTORY
-A
-.Xr sh 1
-command, the Thompson shell, appeared in
-.At v1 .
-It was superseded in
-.At v7
-by the Bourne shell, which inherited the name
-.Xr sh 1 .
-.
-.Pp
-The
-.Fx
-version of
-.Xr sh 1
-was rewritten in 1989 under the
-.Bx
-license after the Bourne shell from
-.At V.4 .
-.
-.Pp
-The
-.Nm
-sources were imported from
-.Fx 12.0
-.Xr sh 1 .
-Bundled
-.Xr editline 3
-sources were imported from
-.Nx 8.0 .
-.
-.Ss Differences from sh
-.Bl -bullet -compact
-.It
-History is saved with
-.Va HISTFILE .
-.It
-Further prompt customization with
-.Va PS0 ,
-.Va RPS1 ,
-.Va RPS2 .
-.It
-.Va HOME
-is shortened to
-.Sq ~
-in prompt expansion.
-.It
-Exit status prompt expansion.
-.It
-.Ic fc Fl s Ar = Ns Ar new
-prefixes commands.
-.El
-.
-.Sh AUTHORS
-.An -nosplit
-The
-.Fx
-version of
-.Xr sh 1
-was originally written by
-.An Kenneth Almquist .
-.
-.Pp
-The
-.Nm
-utility is developed by
-.An C. McEnroe Aq Mt june@causal.agency .
-.
-.Sh BUGS
-The
-.Nm
-utility does not recognize multibyte characters other than UTF-8.
-Splitting using
-.Va IFS
-does not recognize multibyte characters.
diff --git a/bin/1sh/Makefile b/bin/1sh/Makefile
deleted file mode 100644
index afd0350b..00000000
--- a/bin/1sh/Makefile
+++ /dev/null
@@ -1,88 +0,0 @@
-PREFIX = /usr/local
-MANDIR = ${PREFIX}/share/man
-
-CFLAGS += -std=c99 -Wall -Wextra -DSHELL
-LDLIBS = -ledit
-
--include config.mk
-
-SRCS += alias.c
-SRCS += arith_yacc.c
-SRCS += arith_yylex.c
-SRCS += cd.c
-SRCS += echo.c
-SRCS += error.c
-SRCS += eval.c
-SRCS += exec.c
-SRCS += expand.c
-SRCS += histedit.c
-SRCS += input.c
-SRCS += jobs.c
-SRCS += kill.c
-SRCS += mail.c
-SRCS += main.c
-SRCS += memalloc.c
-SRCS += miscbltin.c
-SRCS += mystring.c
-SRCS += options.c
-SRCS += output.c
-SRCS += parser.c
-SRCS += printf.c
-SRCS += redir.c
-SRCS += show.c
-SRCS += test.c
-SRCS += trap.c
-SRCS += var.c
-
-GENSRCS = builtins.c nodes.c syntax.c
-GENHDRS = builtins.h nodes.h syntax.h token.h
-
-SRCS += ${GENSRCS}
-OBJS = ${SRCS:.c=.o}
-
-MANS = 1sh.1 1sh-kill.1 1sh-printf.1 1sh-test.1
-
-all: tags 1sh
-
-1sh: ${OBJS}
-	${CC} ${LDFLAGS} ${OBJS} ${LDLIBS} -o $@
-
-${OBJS}: ${GENHDRS}
-
-builtins.c builtins.h: mkbuiltins builtins.def
-	sh mkbuiltins .
-
-nodes.c nodes.h: mknodes nodetypes nodes.c.pat
-	./mknodes nodetypes nodes.c.pat
-
-syntax.c syntax.h: mksyntax
-	./mksyntax
-
-token.h: mktokens
-	sh mktokens
-
-tags: *.h *.c
-	ctags -w *.h *.c
-
-depend: ${SRCS} ${GENHDRS}
-	${CC} ${CFLAGS} -MM ${SRCS} > .depend
-
--include .depend
-
-clean:
-	rm -f 1sh ${OBJS} mknodes mksyntax ${GENSRCS} ${GENHDRS} tags .depend
-
-install: 1sh ${MANS}
-	install -d ${PREFIX}/bin ${MANDIR}/man1
-	install 1sh ${PREFIX}/bin
-	install -m 644 ${MANS} ${MANDIR}/man1
-
-uninstall:
-	rm -f ${PREFIX}/bin/1sh ${MANS:%=${MANDIR}/man1/%}
-
-shell:
-	grep -q '^${PREFIX}/bin/1sh$$' /etc/shells \
-		|| echo '${PREFIX}/bin/1sh' >> /etc/shells
-
-unshell:
-	sed -i sed '\;^${PREFIX}/bin/1sh$$;d' /etc/shells
diff --git a/bin/1sh/TOUR b/bin/1sh/TOUR
deleted file mode 100644
index 68330af0..00000000
--- a/bin/1sh/TOUR
+++ /dev/null
@@ -1,301 +0,0 @@
-#	@(#)TOUR	8.1 (Berkeley) 5/31/93
-# $FreeBSD: releng/12.0/bin/sh/TOUR 317882 2017-05-06 13:28:42Z jilles $
-
-NOTE -- This is the original TOUR paper distributed with ash and
-does not represent the current state of the shell.  It is provided anyway
-since it provides helpful information for how the shell is structured,
-but be warned that things have changed -- the current shell is
-still under development.
-
-================================================================
-
-                       A Tour through Ash
-
-               Copyright 1989 by Kenneth Almquist.
-
-
-DIRECTORIES:  The subdirectory bltin contains commands which can
-be compiled stand-alone.  The rest of the source is in the main
-ash directory.
-
-SOURCE CODE GENERATORS:  Files whose names begin with "mk" are
-programs that generate source code.  A complete list of these
-programs is:
-
-        program         input files         generates
-        -------         -----------         ---------
-        mkbuiltins      builtins.def        builtins.h builtins.c
-        mknodes         nodetypes           nodes.h nodes.c
-        mksyntax            -               syntax.h syntax.c
-        mktokens            -               token.h
-
-There are undoubtedly too many of these.
-
-EXCEPTIONS:  Code for dealing with exceptions appears in
-exceptions.c.  The C language doesn't include exception handling,
-so I implement it using setjmp and longjmp.  The global variable
-exception contains the type of exception.  EXERROR is raised by
-calling error.  EXINT is an interrupt.
-
-INTERRUPTS:  In an interactive shell, an interrupt will cause an
-EXINT exception to return to the main command loop.  (Exception:
-EXINT is not raised if the user traps interrupts using the trap
-command.)  The INTOFF and INTON macros (defined in exception.h)
-provide uninterruptible critical sections.  Between the execution
-of INTOFF and the execution of INTON, interrupt signals will be
-held for later delivery.  INTOFF and INTON can be nested.
-
-MEMALLOC.C:  Memalloc.c defines versions of malloc and realloc
-which call error when there is no memory left.  It also defines a
-stack oriented memory allocation scheme.  Allocating off a stack
-is probably more efficient than allocation using malloc, but the
-big advantage is that when an exception occurs all we have to do
-to free up the memory in use at the time of the exception is to
-restore the stack pointer.  The stack is implemented using a
-linked list of blocks.
-
-STPUTC:  If the stack were contiguous, it would be easy to store
-strings on the stack without knowing in advance how long the
-string was going to be:
-        p = stackptr;
-        *p++ = c;       /* repeated as many times as needed */
-        stackptr = p;
-The following three macros (defined in memalloc.h) perform these
-operations, but grow the stack if you run off the end:
-        STARTSTACKSTR(p);
-        STPUTC(c, p);   /* repeated as many times as needed */
-        grabstackstr(p);
-
-We now start a top-down look at the code:
-
-MAIN.C:  The main routine performs some initialization, executes
-the user's profile if necessary, and calls cmdloop.  Cmdloop
-repeatedly parses and executes commands.
-
-OPTIONS.C:  This file contains the option processing code.  It is
-called from main to parse the shell arguments when the shell is
-invoked, and it also contains the set builtin.  The -i and -m op-
-tions (the latter turns on job control) require changes in signal
-handling.  The routines setjobctl (in jobs.c) and setinteractive
-(in trap.c) are called to handle changes to these options.
-
-PARSING:  The parser code is all in parser.c.  A recursive des-
-cent parser is used.  Syntax tables (generated by mksyntax) are
-used to classify characters during lexical analysis.  There are
-four tables:  one for normal use, one for use when inside single
-quotes and dollar single quotes, one for use when inside double
-quotes and one for use in arithmetic.  The tables are machine
-dependent because they are indexed by character variables and
-the range of a char varies from machine to machine.
-
-PARSE OUTPUT:  The output of the parser consists of a tree of
-nodes.  The various types of nodes are defined in the file node-
-types.
-
-Nodes of type NARG are used to represent both words and the con-
-tents of here documents.  An early version of ash kept the con-
-tents of here documents in temporary files, but keeping here do-
-cuments in memory typically results in significantly better per-
-formance.  It would have been nice to make it an option to use
-temporary files for here documents, for the benefit of small
-machines, but the code to keep track of when to delete the tem-
-porary files was complex and I never fixed all the bugs in it.
-(AT&T has been maintaining the Bourne shell for more than ten
-years, and to the best of my knowledge they still haven't gotten
-it to handle temporary files correctly in obscure cases.)
-
-The text field of a NARG structure points to the text of the
-word.  The text consists of ordinary characters and a number of
-special codes defined in parser.h.  The special codes are:
-
-        CTLVAR              Parameter expansion
-        CTLENDVAR           End of parameter expansion
-        CTLBACKQ            Command substitution
-        CTLBACKQ|CTLQUOTE   Command substitution inside double quotes
-        CTLARI              Arithmetic expansion
-        CTLENDARI           End of arithmetic expansion
-        CTLESC              Escape next character
-
-A variable substitution contains the following elements:
-
-        CTLVAR type name '=' [ alternative-text CTLENDVAR ]
-
-The type field is a single character specifying the type of sub-
-stitution.  The possible types are:
-
-        VSNORMAL            $var
-        VSMINUS             ${var-text}
-        VSMINUS|VSNUL       ${var:-text}
-        VSPLUS              ${var+text}
-        VSPLUS|VSNUL        ${var:+text}
-        VSQUESTION          ${var?text}
-        VSQUESTION|VSNUL    ${var:?text}
-        VSASSIGN            ${var=text}
-        VSASSIGN|VSNUL      ${var:=text}
-        VSTRIMLEFT          ${var#text}
-        VSTRIMLEFTMAX       ${var##text}
-        VSTRIMRIGHT         ${var%text}
-        VSTRIMRIGHTMAX      ${var%%text}
-        VSLENGTH            ${#var}
-        VSERROR             delayed error
-
-In addition, the type field will have the VSQUOTE flag set if the
-variable is enclosed in double quotes and the VSLINENO flag if
-LINENO is being expanded (the parameter name is the decimal line
-number).  The parameter's name comes next, terminated by an equals
-sign.  If the type is not VSNORMAL (including when it is VSLENGTH),
-then the text field in the substitution follows, terminated by a
-CTLENDVAR byte.
-
-The type VSERROR is used to allow parsing bad substitutions like
-${var[7]} and generate an error when they are expanded.
-
-Commands in back quotes are parsed and stored in a linked list.
-The locations of these commands in the string are indicated by
-CTLBACKQ and CTLBACKQ+CTLQUOTE characters, depending upon whether
-the back quotes were enclosed in double quotes.
-
-Arithmetic expansion starts with CTLARI and ends with CTLENDARI.
-
-The character CTLESC escapes the next character, so that in case
-any of the CTL characters mentioned above appear in the input,
-they can be passed through transparently.  CTLESC is also used to
-escape '*', '?', '[', and '!' characters which were quoted by the
-user and thus should not be used for file name generation.
-
-CTLESC characters have proved to be particularly tricky to get
-right.  In the case of here documents which are not subject to
-variable and command substitution, the parser doesn't insert any
-CTLESC characters to begin with (so the contents of the text
-field can be written without any processing).  Other here docu-
-ments, and words which are not subject to file name generation,
-have the CTLESC characters removed during the variable and command
-substitution phase.  Words which are subject to file name
-generation have the CTLESC characters removed as part of the file
-name phase.
-
-EXECUTION:  Command execution is handled by the following files:
-        eval.c     The top level routines.
-        redir.c    Code to handle redirection of input and output.
-        jobs.c     Code to handle forking, waiting, and job control.
-        exec.c     Code to do path searches and the actual exec sys call.
-        expand.c   Code to evaluate arguments.
-        var.c      Maintains the variable symbol table.  Called from expand.c.
-
-EVAL.C:  Evaltree recursively executes a parse tree.  The exit
-status is returned in the global variable exitstatus.  The alter-
-native entry evalbackcmd is called to evaluate commands in back
-quotes.  It saves the result in memory if the command is a buil-
-tin; otherwise it forks off a child to execute the command and
-connects the standard output of the child to a pipe.
-
-JOBS.C:  To create a process, you call makejob to return a job
-structure, and then call forkshell (passing the job structure as
-an argument) to create the process.  Waitforjob waits for a job
-to complete.  These routines take care of process groups if job
-control is defined.
-
-REDIR.C:  Ash allows file descriptors to be redirected and then
-restored without forking off a child process.  This is accom-
-plished by duplicating the original file descriptors.  The redir-
-tab structure records where the file descriptors have been dupli-
-cated to.
-
-EXEC.C:  The routine find_command locates a command, and enters
-the command in the hash table if it is not already there.  The
-third argument specifies whether it is to print an error message
-if the command is not found.  (When a pipeline is set up,
-find_command is called for all the commands in the pipeline be-
-fore any forking is done, so to get the commands into the hash
-table of the parent process.  But to make command hashing as
-transparent as possible, we silently ignore errors at that point
-and only print error messages if the command cannot be found
-later.)
-
-The routine shellexec is the interface to the exec system call.
-
-EXPAND.C:  As the routine argstr generates words by parameter
-expansion, command substitution and arithmetic expansion, it
-performs word splitting on the result.  As each word is output,
-the routine expandmeta performs file name generation (if enabled).
-
-VAR.C:  Variables are stored in a hash table.  Probably we should
-switch to extensible hashing.  The variable name is stored in the
-same string as the value (using the format "name=value") so that
-no string copying is needed to create the environment of a com-
-mand.  Variables which the shell references internally are preal-
-located so that the shell can reference the values of these vari-
-ables without doing a lookup.
-
-When a program is run, the code in eval.c sticks any environment
-variables which precede the command (as in "PATH=xxx command") in
-the variable table as the simplest way to strip duplicates, and
-then calls "environment" to get the value of the environment.
-
-BUILTIN COMMANDS:  The procedures for handling these are scat-
-tered throughout the code, depending on which location appears
-most appropriate.  They can be recognized because their names al-
-ways end in "cmd".  The mapping from names to procedures is
-specified in the file builtins.def, which is processed by the
-mkbuiltins command.
-
-A builtin command is invoked with argc and argv set up like a
-normal program.  A builtin command is allowed to overwrite its
-arguments.  Builtin routines can call nextopt to do option pars-
-ing.  This is kind of like getopt, but you don't pass argc and
-argv to it.  Builtin routines can also call error.  This routine
-normally terminates the shell (or returns to the main command
-loop if the shell is interactive), but when called from a non-
-special builtin command it causes the builtin command to
-terminate with an exit status of 2.
-
-The directory bltins contains commands which can be compiled in-
-dependently but can also be built into the shell for efficiency
-reasons.  The header file bltin.h takes care of most of the
-differences between the ash and the stand-alone environment.
-The user should call the main routine "main", and #define main to
-be the name of the routine to use when the program is linked into
-ash.  This #define should appear before bltin.h is included;
-bltin.h will #undef main if the program is to be compiled
-stand-alone. A similar approach is used for a few utilities from
-bin and usr.bin.
-
-CD.C:  This file defines the cd and pwd builtins.
-
-SIGNALS:  Trap.c implements the trap command.  The routine set-
-signal figures out what action should be taken when a signal is
-received and invokes the signal system call to set the signal ac-
-tion appropriately.  When a signal that a user has set a trap for
-is caught, the routine "onsig" sets a flag.  The routine dotrap
-is called at appropriate points to actually handle the signal.
-When an interrupt is caught and no trap has been set for that
-signal, the routine "onint" in error.c is called.
-
-OUTPUT:  Ash uses its own output routines.  There are three out-
-put structures allocated.  "Output" represents the standard out-
-put, "errout" the standard error, and "memout" contains output
-which is to be stored in memory.  This last is used when a buil-
-tin command appears in backquotes, to allow its output to be col-
-lected without doing any I/O through the UNIX operating system.
-The variables out1 and out2 normally point to output and errout,
-respectively, but they are set to point to memout when appropri-
-ate inside backquotes.
-
-INPUT:  The basic input routine is pgetc, which reads from the
-current input file.  There is a stack of input files; the current
-input file is the top file on this stack.  The code allows the
-input to come from a string rather than a file.  (This is for the
--c option and the "." and eval builtin commands.)  The global
-variable plinno is saved and restored when files are pushed and
-popped from the stack.  The parser routines store the number of
-the current line in this variable.
-
-DEBUGGING:  If DEBUG is defined in shell.h, then the shell will
-write debugging information to the file $HOME/trace.  Most of
-this is done using the TRACE macro, which takes a set of printf
-arguments inside two sets of parenthesis.  Example:
-"TRACE(("n=%d0, n))".  The double parenthesis are necessary be-
-cause the preprocessor can't handle functions with a variable
-number of arguments.  Defining DEBUG also causes the shell to
-generate a core dump if it is sent a quit signal.  The tracing
-code is in show.c.
diff --git a/bin/1sh/alias.c b/bin/1sh/alias.c
deleted file mode 100644
index 593e7457..00000000
--- a/bin/1sh/alias.c
+++ /dev/null
@@ -1,256 +0,0 @@
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)alias.c	8.3 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/alias.c 317039 2017-04-16 22:10:02Z jilles $");
-
-#include <stdlib.h>
-#include "shell.h"
-#include "output.h"
-#include "error.h"
-#include "memalloc.h"
-#include "mystring.h"
-#include "alias.h"
-#include "options.h"
-#include "builtins.h"
-
-#define ATABSIZE 39
-
-static struct alias *atab[ATABSIZE];
-static int aliases;
-
-static void setalias(const char *, const char *);
-static int unalias(const char *);
-static struct alias **hashalias(const char *);
-
-static
-void
-setalias(const char *name, const char *val)
-{
-	struct alias *ap, **app;
-
-	unalias(name);
-	app = hashalias(name);
-	INTOFF;
-	ap = ckmalloc(sizeof (struct alias));
-	ap->name = savestr(name);
-	ap->val = savestr(val);
-	ap->flag = 0;
-	ap->next = *app;
-	*app = ap;
-	aliases++;
-	INTON;
-}
-
-static void
-freealias(struct alias *ap)
-{
-	ckfree(ap->name);
-	ckfree(ap->val);
-	ckfree(ap);
-}
-
-static int
-unalias(const char *name)
-{
-	struct alias *ap, **app;
-
-	app = hashalias(name);
-
-	for (ap = *app; ap; app = &(ap->next), ap = ap->next) {
-		if (equal(name, ap->name)) {
-			/*
-			 * if the alias is currently in use (i.e. its
-			 * buffer is being used by the input routine) we
-			 * just null out the name instead of freeing it.
-			 * We could clear it out later, but this situation
-			 * is so rare that it hardly seems worth it.
-			 */
-			if (ap->flag & ALIASINUSE)
-				*ap->name = '\0';
-			else {
-				INTOFF;
-				*app = ap->next;
-				freealias(ap);
-				INTON;
-			}
-			aliases--;
-			return (0);
-		}
-	}
-
-	return (1);
-}
-
-static void
-rmaliases(void)
-{
-	struct alias *ap, **app;
-	int i;
-
-	INTOFF;
-	for (i = 0; i < ATABSIZE; i++) {
-		app = &atab[i];
-		while (*app) {
-			ap = *app;
-			if (ap->flag & ALIASINUSE) {
-				*ap->name = '\0';
-				app = &(*app)->next;
-			} else {
-				*app = ap->next;
-				freealias(ap);
-			}
-		}
-	}
-	aliases = 0;
-	INTON;
-}
-
-struct alias *
-lookupalias(const char *name, int check)
-{
-	struct alias *ap;
-
-	if (aliases == 0)
-		return (NULL);
-	for (ap = *hashalias(name); ap; ap = ap->next) {
-		if (equal(name, ap->name)) {
-			if (check && (ap->flag & ALIASINUSE))
-				return (NULL);
-			return (ap);
-		}
-	}
-
-	return (NULL);
-}
-
-static int
-comparealiases(const void *p1, const void *p2)
-{
-	const struct alias *const *a1 = p1;
-	const struct alias *const *a2 = p2;
-
-	return strcmp((*a1)->name, (*a2)->name);
-}
-
-static void
-printalias(const struct alias *a)
-{
-	out1fmt("%s=", a->name);
-	out1qstr(a->val);
-	out1c('\n');
-}
-
-static void
-printaliases(void)
-{
-	int i, j;
-	struct alias **sorted, *ap;
-
-	INTOFF;
-	sorted = ckmalloc(aliases * sizeof(*sorted));
-	j = 0;
-	for (i = 0; i < ATABSIZE; i++)
-		for (ap = atab[i]; ap; ap = ap->next)
-			if (*ap->name != '\0')
-				sorted[j++] = ap;
-	qsort(sorted, aliases, sizeof(*sorted), comparealiases);
-	for (i = 0; i < aliases; i++) {
-		printalias(sorted[i]);
-		if (int_pending())
-			break;
-	}
-	ckfree(sorted);
-	INTON;
-}
-
-int
-aliascmd(int argc __unused, char **argv __unused)
-{
-	char *n, *v;
-	int ret = 0;
-	struct alias *ap;
-
-	nextopt("");
-
-	if (*argptr == NULL) {
-		printaliases();
-		return (0);
-	}
-	while ((n = *argptr++) != NULL) {
-		if ((v = strchr(n+1, '=')) == NULL) /* n+1: funny ksh stuff */
-			if ((ap = lookupalias(n, 0)) == NULL) {
-				warning("%s: not found", n);
-				ret = 1;
-			} else
-				printalias(ap);
-		else {
-			*v++ = '\0';
-			setalias(n, v);
-		}
-	}
-
-	return (ret);
-}
-
-int
-unaliascmd(int argc __unused, char **argv __unused)
-{
-	int i;
-
-	while ((i = nextopt("a")) != '\0') {
-		if (i == 'a') {
-			rmaliases();
-			return (0);
-		}
-	}
-	for (i = 0; *argptr; argptr++)
-		i |= unalias(*argptr);
-
-	return (i);
-}
-
-static struct alias **
-hashalias(const char *p)
-{
-	unsigned int hashval;
-
-	hashval = (unsigned char)*p << 4;
-	while (*p)
-		hashval+= *p++;
-	return &atab[hashval % ATABSIZE];
-}
diff --git a/bin/1sh/alias.h b/bin/1sh/alias.h
deleted file mode 100644
index 837f1305..00000000
--- a/bin/1sh/alias.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)alias.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/alias.h 314436 2017-02-28 23:42:47Z imp $
- */
-
-#define ALIASINUSE	1
-
-struct alias {
-	struct alias *next;
-	char *name;
-	char *val;
-	int flag;
-};
-
-struct alias *lookupalias(const char *, int);
diff --git a/bin/1sh/arith.h b/bin/1sh/arith.h
deleted file mode 100644
index 364092fa..00000000
--- a/bin/1sh/arith.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*-
- * Copyright (c) 1995
- *      The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)arith.h	1.1 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/arith.h 315511 2017-03-18 20:41:07Z jilles $
- */
-
-#include "shell.h"
-
-#define DIGITS(var) (3 + (2 + CHAR_BIT * sizeof((var))) / 3)
-
-arith_t arith(const char *);
diff --git a/bin/1sh/arith_yacc.c b/bin/1sh/arith_yacc.c
deleted file mode 100644
index 604096aa..00000000
--- a/bin/1sh/arith_yacc.c
+++ /dev/null
@@ -1,381 +0,0 @@
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- * Copyright (c) 2007
- *	Herbert Xu <herbert@gondor.apana.org.au>.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/arith_yacc.c 270246 2014-08-20 20:15:43Z jilles $");
-
-#include <limits.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include "arith.h"
-#include "arith_yacc.h"
-#include "expand.h"
-#include "shell.h"
-#include "error.h"
-#include "memalloc.h"
-#include "output.h"
-#include "options.h"
-#include "var.h"
-
-#if ARITH_BOR + 11 != ARITH_BORASS || ARITH_ASS + 11 != ARITH_EQ
-#error Arithmetic tokens are out of order.
-#endif
-
-static const char *arith_startbuf;
-
-const char *arith_buf;
-union yystype yylval;
-
-static int last_token;
-
-#define ARITH_PRECEDENCE(op, prec) [op - ARITH_BINOP_MIN] = prec
-
-static const char prec[ARITH_BINOP_MAX - ARITH_BINOP_MIN] = {
-	ARITH_PRECEDENCE(ARITH_MUL, 0),
-	ARITH_PRECEDENCE(ARITH_DIV, 0),
-	ARITH_PRECEDENCE(ARITH_REM, 0),
-	ARITH_PRECEDENCE(ARITH_ADD, 1),
-	ARITH_PRECEDENCE(ARITH_SUB, 1),
-	ARITH_PRECEDENCE(ARITH_LSHIFT, 2),
-	ARITH_PRECEDENCE(ARITH_RSHIFT, 2),
-	ARITH_PRECEDENCE(ARITH_LT, 3),
-	ARITH_PRECEDENCE(ARITH_LE, 3),
-	ARITH_PRECEDENCE(ARITH_GT, 3),
-	ARITH_PRECEDENCE(ARITH_GE, 3),
-	ARITH_PRECEDENCE(ARITH_EQ, 4),
-	ARITH_PRECEDENCE(ARITH_NE, 4),
-	ARITH_PRECEDENCE(ARITH_BAND, 5),
-	ARITH_PRECEDENCE(ARITH_BXOR, 6),
-	ARITH_PRECEDENCE(ARITH_BOR, 7),
-};
-
-#define ARITH_MAX_PREC 8
-
-int letcmd(int, char **);
-
-static __dead2 void yyerror(const char *s)
-{
-	error("arithmetic expression: %s: \"%s\"", s, arith_startbuf);
-	/* NOTREACHED */
-}
-
-static arith_t arith_lookupvarint(char *varname)
-{
-	const char *str;
-	char *p;
-	arith_t result;
-
-	str = lookupvar(varname);
-	if (uflag && str == NULL)
-		yyerror("variable not set");
-	if (str == NULL || *str == '\0')
-		str = "0";
-	errno = 0;
-	result = strtoarith_t(str, &p, 0);
-	if (errno != 0 || *p != '\0')
-		yyerror("variable conversion error");
-	return result;
-}
-
-static inline int arith_prec(int op)
-{
-	return prec[op - ARITH_BINOP_MIN];
-}
-
-static inline int higher_prec(int op1, int op2)
-{
-	return arith_prec(op1) < arith_prec(op2);
-}
-
-static arith_t do_binop(int op, arith_t a, arith_t b)
-{
-
-	switch (op) {
-	default:
-	case ARITH_REM:
-	case ARITH_DIV:
-		if (!b)
-			yyerror("division by zero");
-		if (a == ARITH_MIN && b == -1)
-			yyerror("divide error");
-		return op == ARITH_REM ? a % b : a / b;
-	case ARITH_MUL:
-		return (uintmax_t)a * (uintmax_t)b;
-	case ARITH_ADD:
-		return (uintmax_t)a + (uintmax_t)b;
-	case ARITH_SUB:
-		return (uintmax_t)a - (uintmax_t)b;
-	case ARITH_LSHIFT:
-		return (uintmax_t)a << (b & (sizeof(uintmax_t) * CHAR_BIT - 1));
-	case ARITH_RSHIFT:
-		return a >> (b & (sizeof(uintmax_t) * CHAR_BIT - 1));
-	case ARITH_LT:
-		return a < b;
-	case ARITH_LE:
-		return a <= b;
-	case ARITH_GT:
-		return a > b;
-	case ARITH_GE:
-		return a >= b;
-	case ARITH_EQ:
-		return a == b;
-	case ARITH_NE:
-		return a != b;
-	case ARITH_BAND:
-		return a & b;
-	case ARITH_BXOR:
-		return a ^ b;
-	case ARITH_BOR:
-		return a | b;
-	}
-}
-
-static arith_t assignment(int var, int noeval);
-
-static arith_t primary(int token, union yystype *val, int op, int noeval)
-{
-	arith_t result;
-
-again:
-	switch (token) {
-	case ARITH_LPAREN:
-		result = assignment(op, noeval);
-		if (last_token != ARITH_RPAREN)
-			yyerror("expecting ')'");
-		last_token = yylex();
-		return result;
-	case ARITH_NUM:
-		last_token = op;
-		return val->val;
-	case ARITH_VAR:
-		last_token = op;
-		return noeval ? val->val : arith_lookupvarint(val->name);
-	case ARITH_ADD:
-		token = op;
-		*val = yylval;
-		op = yylex();
-		goto again;
-	case ARITH_SUB:
-		*val = yylval;
-		return -primary(op, val, yylex(), noeval);
-	case ARITH_NOT:
-		*val = yylval;
-		return !primary(op, val, yylex(), noeval);
-	case ARITH_BNOT:
-		*val = yylval;
-		return ~primary(op, val, yylex(), noeval);
-	default:
-		yyerror("expecting primary");
-	}
-}
-
-static arith_t binop2(arith_t a, int op, int precedence, int noeval)
-{
-	for (;;) {
-		union yystype val;
-		arith_t b;
-		int op2;
-		int token;
-
-		token = yylex();
-		val = yylval;
-
-		b = primary(token, &val, yylex(), noeval);
-
-		op2 = last_token;
-		if (op2 >= ARITH_BINOP_MIN && op2 < ARITH_BINOP_MAX &&
-		    higher_prec(op2, op)) {
-			b = binop2(b, op2, arith_prec(op), noeval);
-			op2 = last_token;
-		}
-
-		a = noeval ? b : do_binop(op, a, b);
-
-		if (op2 < ARITH_BINOP_MIN || op2 >= ARITH_BINOP_MAX ||
-		    arith_prec(op2) >= precedence)
-			return a;
-
-		op = op2;
-	}
-}
-
-static arith_t binop(int token, union yystype *val, int op, int noeval)
-{
-	arith_t a = primary(token, val, op, noeval);
-
-	op = last_token;
-	if (op < ARITH_BINOP_MIN || op >= ARITH_BINOP_MAX)
-		return a;
-
-	return binop2(a, op, ARITH_MAX_PREC, noeval);
-}
-
-static arith_t and(int token, union yystype *val, int op, int noeval)
-{
-	arith_t a = binop(token, val, op, noeval);
-	arith_t b;
-
-	op = last_token;
-	if (op != ARITH_AND)
-		return a;
-
-	token = yylex();
-	*val = yylval;
-
-	b = and(token, val, yylex(), noeval | !a);
-
-	return a && b;
-}
-
-static arith_t or(int token, union yystype *val, int op, int noeval)
-{
-	arith_t a = and(token, val, op, noeval);
-	arith_t b;
-
-	op = last_token;
-	if (op != ARITH_OR)
-		return a;
-
-	token = yylex();
-	*val = yylval;
-
-	b = or(token, val, yylex(), noeval | !!a);
-
-	return a || b;
-}
-
-static arith_t cond(int token, union yystype *val, int op, int noeval)
-{
-	arith_t a = or(token, val, op, noeval);
-	arith_t b;
-	arith_t c;
-
-	if (last_token != ARITH_QMARK)
-		return a;
-
-	b = assignment(yylex(), noeval | !a);
-
-	if (last_token != ARITH_COLON)
-		yyerror("expecting ':'");
-
-	token = yylex();
-	*val = yylval;
-
-	c = cond(token, val, yylex(), noeval | !!a);
-
-	return a ? b : c;
-}
-
-static arith_t assignment(int var, int noeval)
-{
-	union yystype val = yylval;
-	int op = yylex();
-	arith_t result;
-	char sresult[DIGITS(result) + 1];
-
-	if (var != ARITH_VAR)
-		return cond(var, &val, op, noeval);
-
-	if (op != ARITH_ASS && (op < ARITH_ASS_MIN || op >= ARITH_ASS_MAX))
-		return cond(var, &val, op, noeval);
-
-	result = assignment(yylex(), noeval);
-	if (noeval)
-		return result;
-
-	if (op != ARITH_ASS)
-		result = do_binop(op - 11, arith_lookupvarint(val.name), result);
-	snprintf(sresult, sizeof(sresult), ARITH_FORMAT_STR, result);
-	setvar(val.name, sresult, 0);
-	return result;
-}
-
-arith_t arith(const char *s)
-{
-	struct stackmark smark;
-	arith_t result;
-
-	setstackmark(&smark);
-
-	arith_buf = arith_startbuf = s;
-
-	result = assignment(yylex(), 0);
-
-	if (last_token)
-		yyerror("expecting EOF");
-
-	popstackmark(&smark);
-
-	return result;
-}
-
-/*
- *  The exp(1) builtin.
- */
-int
-letcmd(int argc, char **argv)
-{
-	const char *p;
-	char *concat;
-	char **ap;
-	arith_t i;
-
-	if (argc > 1) {
-		p = argv[1];
-		if (argc > 2) {
-			/*
-			 * Concatenate arguments.
-			 */
-			STARTSTACKSTR(concat);
-			ap = argv + 2;
-			for (;;) {
-				while (*p)
-					STPUTC(*p++, concat);
-				if ((p = *ap++) == NULL)
-					break;
-				STPUTC(' ', concat);
-			}
-			STPUTC('\0', concat);
-			p = grabstackstr(concat);
-		}
-	} else
-		p = "";
-
-	i = arith(p);
-
-	out1fmt(ARITH_FORMAT_STR "\n", i);
-	return !i;
-}
diff --git a/bin/1sh/arith_yacc.h b/bin/1sh/arith_yacc.h
deleted file mode 100644
index 2dc43526..00000000
--- a/bin/1sh/arith_yacc.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- * Copyright (c) 2007
- *	Herbert Xu <herbert@gondor.apana.org.au>.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD: releng/12.0/bin/sh/arith_yacc.h 279503 2015-03-01 21:46:55Z jilles $
- */
-
-#define ARITH_ASS 1
-
-#define ARITH_OR 2
-#define ARITH_AND 3
-#define ARITH_BAD 4
-#define ARITH_NUM 5
-#define ARITH_VAR 6
-#define ARITH_NOT 7
-
-#define ARITH_BINOP_MIN 8
-#define ARITH_LE 8
-#define ARITH_GE 9
-#define ARITH_LT 10
-#define ARITH_GT 11
-#define ARITH_EQ 12
-#define ARITH_REM 13
-#define ARITH_BAND 14
-#define ARITH_LSHIFT 15
-#define ARITH_RSHIFT 16
-#define ARITH_MUL 17
-#define ARITH_ADD 18
-#define ARITH_BOR 19
-#define ARITH_SUB 20
-#define ARITH_BXOR 21
-#define ARITH_DIV 22
-#define ARITH_NE 23
-#define ARITH_BINOP_MAX 24
-
-#define ARITH_ASS_MIN 24
-#define ARITH_REMASS 24
-#define ARITH_BANDASS 25
-#define ARITH_LSHIFTASS 26
-#define ARITH_RSHIFTASS 27
-#define ARITH_MULASS 28
-#define ARITH_ADDASS 29
-#define ARITH_BORASS 30
-#define ARITH_SUBASS 31
-#define ARITH_BXORASS 32
-#define ARITH_DIVASS 33
-#define ARITH_ASS_MAX 34
-
-#define ARITH_LPAREN 34
-#define ARITH_RPAREN 35
-#define ARITH_BNOT 36
-#define ARITH_QMARK 37
-#define ARITH_COLON 38
-
-extern const char *arith_buf;
-
-union yystype {
-	arith_t val;
-	char *name;
-};
-
-extern union yystype yylval;
-
-int yylex(void);
diff --git a/bin/1sh/arith_yylex.c b/bin/1sh/arith_yylex.c
deleted file mode 100644
index 0f38c878..00000000
--- a/bin/1sh/arith_yylex.c
+++ /dev/null
@@ -1,248 +0,0 @@
-/*-
- * Copyright (c) 2002
- *	Herbert Xu.
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/arith_yylex.c 279503 2015-03-01 21:46:55Z jilles $");
-
-#include <inttypes.h>
-#include <stdlib.h>
-#include <string.h>
-#include "shell.h"
-#include "arith_yacc.h"
-#include "expand.h"
-#include "error.h"
-#include "memalloc.h"
-#include "parser.h"
-#include "syntax.h"
-
-#if ARITH_BOR + 11 != ARITH_BORASS || ARITH_ASS + 11 != ARITH_EQ
-#error Arithmetic tokens are out of order.
-#endif
-
-int
-yylex(void)
-{
-	int value;
-	const char *buf = arith_buf;
-	char *end;
-	const char *p;
-
-	for (;;) {
-		value = *buf;
-		switch (value) {
-		case ' ':
-		case '\t':
-		case '\n':
-			buf++;
-			continue;
-		default:
-			return ARITH_BAD;
-		case '0':
-		case '1':
-		case '2':
-		case '3':
-		case '4':
-		case '5':
-		case '6':
-		case '7':
-		case '8':
-		case '9':
-			yylval.val = strtoarith_t(buf, &end, 0);
-			arith_buf = end;
-			return ARITH_NUM;
-		case 'A':
-		case 'B':
-		case 'C':
-		case 'D':
-		case 'E':
-		case 'F':
-		case 'G':
-		case 'H':
-		case 'I':
-		case 'J':
-		case 'K':
-		case 'L':
-		case 'M':
-		case 'N':
-		case 'O':
-		case 'P':
-		case 'Q':
-		case 'R':
-		case 'S':
-		case 'T':
-		case 'U':
-		case 'V':
-		case 'W':
-		case 'X':
-		case 'Y':
-		case 'Z':
-		case '_':
-		case 'a':
-		case 'b':
-		case 'c':
-		case 'd':
-		case 'e':
-		case 'f':
-		case 'g':
-		case 'h':
-		case 'i':
-		case 'j':
-		case 'k':
-		case 'l':
-		case 'm':
-		case 'n':
-		case 'o':
-		case 'p':
-		case 'q':
-		case 'r':
-		case 's':
-		case 't':
-		case 'u':
-		case 'v':
-		case 'w':
-		case 'x':
-		case 'y':
-		case 'z':
-			p = buf;
-			while (buf++, is_in_name(*buf))
-				;
-			yylval.name = stalloc(buf - p + 1);
-			memcpy(yylval.name, p, buf - p);
-			yylval.name[buf - p] = '\0';
-			value = ARITH_VAR;
-			goto out;
-		case '=':
-			value += ARITH_ASS - '=';
-checkeq:
-			buf++;
-checkeqcur:
-			if (*buf != '=')
-				goto out;
-			value += 11;
-			break;
-		case '>':
-			switch (*++buf) {
-			case '=':
-				value += ARITH_GE - '>';
-				break;
-			case '>':
-				value += ARITH_RSHIFT - '>';
-				goto checkeq;
-			default:
-				value += ARITH_GT - '>';
-				goto out;
-			}
-			break;
-		case '<':
-			switch (*++buf) {
-			case '=':
-				value += ARITH_LE - '<';
-				break;
-			case '<':
-				value += ARITH_LSHIFT - '<';
-				goto checkeq;
-			default:
-				value += ARITH_LT - '<';
-				goto out;
-			}
-			break;
-		case '|':
-			if (*++buf != '|') {
-				value += ARITH_BOR - '|';
-				goto checkeqcur;
-			}
-			value += ARITH_OR - '|';
-			break;
-		case '&':
-			if (*++buf != '&') {
-				value += ARITH_BAND - '&';
-				goto checkeqcur;
-			}
-			value += ARITH_AND - '&';
-			break;
-		case '!':
-			if (*++buf != '=') {
-				value += ARITH_NOT - '!';
-				goto out;
-			}
-			value += ARITH_NE - '!';
-			break;
-		case 0:
-			goto out;
-		case '(':
-			value += ARITH_LPAREN - '(';
-			break;
-		case ')':
-			value += ARITH_RPAREN - ')';
-			break;
-		case '*':
-			value += ARITH_MUL - '*';
-			goto checkeq;
-		case '/':
-			value += ARITH_DIV - '/';
-			goto checkeq;
-		case '%':
-			value += ARITH_REM - '%';
-			goto checkeq;
-		case '+':
-			if (buf[1] == '+')
-				return ARITH_BAD;
-			value += ARITH_ADD - '+';
-			goto checkeq;
-		case '-':
-			if (buf[1] == '-')
-				return ARITH_BAD;
-			value += ARITH_SUB - '-';
-			goto checkeq;
-		case '~':
-			value += ARITH_BNOT - '~';
-			break;
-		case '^':
-			value += ARITH_BXOR - '^';
-			goto checkeq;
-		case '?':
-			value += ARITH_QMARK - '?';
-			break;
-		case ':':
-			value += ARITH_COLON - ':';
-			break;
-		}
-		break;
-	}
-
-	buf++;
-out:
-	arith_buf = buf;
-	return value;
-}
diff --git a/bin/1sh/bltin.h b/bin/1sh/bltin.h
deleted file mode 100644
index e9adb878..00000000
--- a/bin/1sh/bltin.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)bltin.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/bltin/bltin.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-/*
- * This file is included by programs which are optionally built into the
- * shell.  If SHELL is defined, we try to map the standard UNIX library
- * routines to ash routines using defines.
- */
-
-#include "shell.h"
-#include "mystring.h"
-#ifdef SHELL
-#include "error.h"
-#include "output.h"
-#include "builtins.h"
-#define FILE struct output
-#undef stdout
-#define stdout out1
-#undef stderr
-#define stderr out2
-#define printf out1fmt
-#undef putc
-#define putc(c, file)	outc(c, file)
-#undef putchar
-#define putchar(c)	out1c(c)
-#define fprintf outfmt
-#define fputs outstr
-#define fwrite(ptr, size, nmemb, file) outbin(ptr, (size) * (nmemb), file)
-#define fflush flushout
-#define INITARGS(argv)
-#define warnx warning
-#define warn(fmt, ...) warning(fmt ": %s", __VA_ARGS__, strerror(errno))
-#define errx(exitstatus, ...) error(__VA_ARGS__)
-
-#else
-#undef NULL
-#include <stdio.h>
-#undef main
-#define INITARGS(argv)	if ((commandname = argv[0]) == NULL) {fputs("Argc is zero\n", stderr); exit(2);} else
-#endif
-
-#include <unistd.h>
-
-pointer stalloc(int);
-int killjob(const char *, int);
-
-extern char *commandname;
diff --git a/bin/1sh/builtins.def b/bin/1sh/builtins.def
deleted file mode 100644
index b3295a9b..00000000
--- a/bin/1sh/builtins.def
+++ /dev/null
@@ -1,96 +0,0 @@
-#!/bin/sh -
-
-#-
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)builtins.def	8.4 (Berkeley) 5/4/95
-# $FreeBSD: releng/12.0/bin/sh/builtins.def 319576 2017-06-04 21:02:48Z bdrewery $
-
-#
-# This file lists all the builtin commands.  The first column is the name
-# of a C routine.
-# The -j flag specifies that this command is to be excluded from systems
-# without job control.
-# The -h flag specifies that this command is to be excluded from systems
-# based on the NO_HISTORY compile-time symbol.
-# The -n flag specifies that this command can safely be run in the same
-# process when it is the only command in a command substitution.  Some
-# commands have special logic defined in safe_builtin().
-# The -s flag specifies that this is a POSIX 'special built-in' command.
-# The rest of the line specifies the command name or names used to run the
-# command.  The entry for bltincmd, which is run when the user does not specify
-# a command, must come first.
-#
-# NOTE: bltincmd must come first!
-
-bltincmd -n	builtin
-aliascmd	alias
-bgcmd -j	bg
-bindcmd		bind
-breakcmd	-s break -s continue
-cdcmd		cd chdir
-commandcmd -n	command
-dotcmd		-s .
-echocmd -n	echo
-evalcmd		-s eval
-execcmd		-s exec
-exitcmd		-s exit
-letcmd		let
-exportcmd	-s export -s readonly
-#exprcmd		expr
-falsecmd -n	false
-fgcmd -j	fg
-freebsd_wordexpcmd	freebsd_wordexp
-getoptscmd	getopts
-hashcmd		hash
-histcmd -h	fc
-jobidcmd -n	jobid
-jobscmd -n	jobs
-killcmd -n	kill
-localcmd	local
-printfcmd -n	printf
-pwdcmd -n	pwd
-readcmd		read
-returncmd	-s return
-setcmd		-s set
-setvarcmd	setvar
-shiftcmd	-s shift
-testcmd -n	test [
-timescmd -n	-s times
-trapcmd		-s trap
-truecmd -n	-s : true
-typecmd -n	type
-ulimitcmd	ulimit
-umaskcmd	umask
-unaliascmd	unalias
-unsetcmd	-s unset
-waitcmd		wait
-wordexpcmd	wordexp
diff --git a/bin/1sh/cd.c b/bin/1sh/cd.c
deleted file mode 100644
index d1780b64..00000000
--- a/bin/1sh/cd.c
+++ /dev/null
@@ -1,430 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)cd.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/cd.c 336320 2018-07-15 21:55:17Z jilles $");
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <limits.h>
-
-/*
- * The cd and pwd commands.
- */
-
-#include "shell.h"
-#include "var.h"
-#include "nodes.h"	/* for jobs.h */
-#include "jobs.h"
-#include "options.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "exec.h"
-#include "redir.h"
-#include "mystring.h"
-#include "show.h"
-#include "cd.h"
-#include "builtins.h"
-
-static int cdlogical(char *);
-static int cdphysical(char *);
-static int docd(char *, int, int);
-static char *getcomponent(char **);
-static char *findcwd(char *);
-static void updatepwd(char *);
-static char *getpwd(void);
-static char *getpwd2(void);
-
-static char *curdir = NULL;	/* current working directory */
-
-int
-cdcmd(int argc __unused, char **argv __unused)
-{
-	const char *dest;
-	const char *path;
-	char *p;
-	struct stat statb;
-	int ch, phys, print = 0, getcwderr = 0;
-	int rc;
-	int errno1 = ENOENT;
-
-	phys = Pflag;
-	while ((ch = nextopt("eLP")) != '\0') {
-		switch (ch) {
-		case 'e':
-			getcwderr = 1;
-			break;
-		case 'L':
-			phys = 0;
-			break;
-		case 'P':
-			phys = 1;
-			break;
-		}
-	}
-
-	if (*argptr != NULL && argptr[1] != NULL)
-		error("too many arguments");
-
-	if ((dest = *argptr) == NULL && (dest = bltinlookup("HOME", 1)) == NULL)
-		error("HOME not set");
-	if (*dest == '\0')
-		dest = ".";
-	if (dest[0] == '-' && dest[1] == '\0') {
-		dest = bltinlookup("OLDPWD", 1);
-		if (dest == NULL)
-			error("OLDPWD not set");
-		print = 1;
-	}
-	if (dest[0] == '/' ||
-	    (dest[0] == '.' && (dest[1] == '/' || dest[1] == '\0')) ||
-	    (dest[0] == '.' && dest[1] == '.' && (dest[2] == '/' || dest[2] == '\0')) ||
-	    (path = bltinlookup("CDPATH", 1)) == NULL)
-		path = "";
-	while ((p = padvance(&path, NULL, dest)) != NULL) {
-		if (stat(p, &statb) < 0) {
-			if (errno != ENOENT)
-				errno1 = errno;
-		} else if (!S_ISDIR(statb.st_mode))
-			errno1 = ENOTDIR;
-		else {
-			if (!print) {
-				/*
-				 * XXX - rethink
-				 */
-				if (p[0] == '.' && p[1] == '/' && p[2] != '\0')
-					print = strcmp(p + 2, dest);
-				else
-					print = strcmp(p, dest);
-			}
-			rc = docd(p, print, phys);
-			if (rc >= 0)
-				return getcwderr ? rc : 0;
-			if (errno != ENOENT)
-				errno1 = errno;
-		}
-	}
-	error("%s: %s", dest, strerror(errno1));
-	/*NOTREACHED*/
-	return 0;
-}
-
-
-/*
- * Actually change the directory.  In an interactive shell, print the
- * directory name if "print" is nonzero.
- */
-static int
-docd(char *dest, int print, int phys)
-{
-	int rc;
-
-	TRACE(("docd(\"%s\", %d, %d) called\n", dest, print, phys));
-
-	/* If logical cd fails, fall back to physical. */
-	if ((phys || (rc = cdlogical(dest)) < 0) && (rc = cdphysical(dest)) < 0)
-		return (-1);
-
-	if (print && iflag && curdir) {
-		out1fmt("%s\n", curdir);
-		/*
-		 * Ignore write errors to preserve the invariant that the
-		 * current directory is changed iff the exit status is 0
-		 * (or 1 if -e was given and the full pathname could not be
-		 * determined).
-		 */
-		flushout(out1);
-		outclearerror(out1);
-	}
-
-	return (rc);
-}
-
-static int
-cdlogical(char *dest)
-{
-	char *p;
-	char *q;
-	char *component;
-	char *path;
-	struct stat statb;
-	int first;
-	int badstat;
-
-	/*
-	 *  Check each component of the path. If we find a symlink or
-	 *  something we can't stat, clear curdir to force a getcwd()
-	 *  next time we get the value of the current directory.
-	 */
-	badstat = 0;
-	path = stsavestr(dest);
-	STARTSTACKSTR(p);
-	if (*dest == '/') {
-		STPUTC('/', p);
-		path++;
-	}
-	first = 1;
-	while ((q = getcomponent(&path)) != NULL) {
-		if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0'))
-			continue;
-		if (! first)
-			STPUTC('/', p);
-		first = 0;
-		component = q;
-		STPUTS(q, p);
-		if (equal(component, ".."))
-			continue;
-		STACKSTRNUL(p);
-		if (lstat(stackblock(), &statb) < 0) {
-			badstat = 1;
-			break;
-		}
-	}
-
-	INTOFF;
-	if ((p = findcwd(badstat ? NULL : dest)) == NULL || chdir(p) < 0) {
-		INTON;
-		return (-1);
-	}
-	updatepwd(p);
-	INTON;
-	return (0);
-}
-
-static int
-cdphysical(char *dest)
-{
-	char *p;
-	int rc = 0;
-
-	INTOFF;
-	if (chdir(dest) < 0) {
-		INTON;
-		return (-1);
-	}
-	p = findcwd(NULL);
-	if (p == NULL) {
-		warning("warning: failed to get name of current directory");
-		rc = 1;
-	}
-	updatepwd(p);
-	INTON;
-	return (rc);
-}
-
-/*
- * Get the next component of the path name pointed to by *path.
- * This routine overwrites *path and the string pointed to by it.
- */
-static char *
-getcomponent(char **path)
-{
-	char *p;
-	char *start;
-
-	if ((p = *path) == NULL)
-		return NULL;
-	start = *path;
-	while (*p != '/' && *p != '\0')
-		p++;
-	if (*p == '\0') {
-		*path = NULL;
-	} else {
-		*p++ = '\0';
-		*path = p;
-	}
-	return start;
-}
-
-
-static char *
-findcwd(char *dir)
-{
-	char *new;
-	char *p;
-	char *path;
-
-	/*
-	 * If our argument is NULL, we don't know the current directory
-	 * any more because we traversed a symbolic link or something
-	 * we couldn't stat().
-	 */
-	if (dir == NULL || curdir == NULL)
-		return getpwd2();
-	path = stsavestr(dir);
-	STARTSTACKSTR(new);
-	if (*dir != '/') {
-		STPUTS(curdir, new);
-		if (STTOPC(new) == '/')
-			STUNPUTC(new);
-	}
-	while ((p = getcomponent(&path)) != NULL) {
-		if (equal(p, "..")) {
-			while (new > stackblock() && (STUNPUTC(new), *new) != '/');
-		} else if (*p != '\0' && ! equal(p, ".")) {
-			STPUTC('/', new);
-			STPUTS(p, new);
-		}
-	}
-	if (new == stackblock())
-		STPUTC('/', new);
-	STACKSTRNUL(new);
-	return stackblock();
-}
-
-/*
- * Update curdir (the name of the current directory) in response to a
- * cd command.  We also call hashcd to let the routines in exec.c know
- * that the current directory has changed.
- */
-static void
-updatepwd(char *dir)
-{
-	char *prevdir;
-
-	hashcd();				/* update command hash table */
-
-	setvar("PWD", dir, VEXPORT);
-	setvar("OLDPWD", curdir, VEXPORT);
-	prevdir = curdir;
-	curdir = dir ? savestr(dir) : NULL;
-	ckfree(prevdir);
-}
-
-int
-pwdcmd(int argc __unused, char **argv __unused)
-{
-	char *p;
-	int ch, phys;
-
-	phys = Pflag;
-	while ((ch = nextopt("LP")) != '\0') {
-		switch (ch) {
-		case 'L':
-			phys = 0;
-			break;
-		case 'P':
-			phys = 1;
-			break;
-		}
-	}
-
-	if (*argptr != NULL)
-		error("too many arguments");
-
-	if (!phys && getpwd()) {
-		out1str(curdir);
-		out1c('\n');
-	} else {
-		if ((p = getpwd2()) == NULL)
-			error(".: %s", strerror(errno));
-		out1str(p);
-		out1c('\n');
-	}
-
-	return 0;
-}
-
-/*
- * Get the current directory and cache the result in curdir.
- */
-static char *
-getpwd(void)
-{
-	char *p;
-
-	if (curdir)
-		return curdir;
-
-	p = getpwd2();
-	if (p != NULL)
-		curdir = savestr(p);
-
-	return curdir;
-}
-
-#define MAXPWD 256
-
-/*
- * Return the current directory.
- */
-static char *
-getpwd2(void)
-{
-	char *pwd;
-	int i;
-
-	for (i = MAXPWD;; i *= 2) {
-		pwd = stalloc(i);
-		if (getcwd(pwd, i) != NULL)
-			return pwd;
-		stunalloc(pwd);
-		if (errno != ERANGE)
-			break;
-	}
-
-	return NULL;
-}
-
-/*
- * Initialize PWD in a new shell.
- * If the shell is interactive, we need to warn if this fails.
- */
-void
-pwd_init(int warn)
-{
-	char *pwd;
-	struct stat stdot, stpwd;
-
-	pwd = lookupvar("PWD");
-	if (pwd && *pwd == '/' && stat(".", &stdot) != -1 &&
-	    stat(pwd, &stpwd) != -1 &&
-	    stdot.st_dev == stpwd.st_dev &&
-	    stdot.st_ino == stpwd.st_ino) {
-		if (curdir)
-			ckfree(curdir);
-		curdir = savestr(pwd);
-	}
-	if (getpwd() == NULL && warn)
-		out2fmt_flush("sh: cannot determine working directory\n");
-	setvar("PWD", curdir, VEXPORT);
-}
diff --git a/bin/1sh/cd.h b/bin/1sh/cd.h
deleted file mode 100644
index 11de2228..00000000
--- a/bin/1sh/cd.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*-
- * Copyright (c) 1995
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD: releng/12.0/bin/sh/cd.h 314436 2017-02-28 23:42:47Z imp $
- */
-
-void	 pwd_init(int);
diff --git a/bin/1sh/echo.c b/bin/1sh/echo.c
deleted file mode 100644
index 78c146e9..00000000
--- a/bin/1sh/echo.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)echo.c	8.2 (Berkeley) 5/4/95
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/bltin/echo.c 326025 2017-11-20 19:49:47Z pfg $");
-
-/*
- * Echo command.
- */
-
-#define main echocmd
-
-#include "bltin.h"
-
-/* #define eflag 1 */
-
-int
-main(int argc, char *argv[])
-{
-	char **ap;
-	char *p;
-	char c;
-	int count;
-	int nflag = 0;
-#ifndef eflag
-	int eflag = 0;
-#endif
-
-	ap = argv;
-	if (argc)
-		ap++;
-	if ((p = *ap) != NULL) {
-		if (equal(p, "-n")) {
-			nflag++;
-			ap++;
-		} else if (equal(p, "-e")) {
-#ifndef eflag
-			eflag++;
-#endif
-			ap++;
-		}
-	}
-	while ((p = *ap++) != NULL) {
-		while ((c = *p++) != '\0') {
-			if (c == '\\' && eflag) {
-				switch (*p++) {
-				case 'a':  c = '\a';  break;
-				case 'b':  c = '\b';  break;
-				case 'c':  return 0;		/* exit */
-				case 'e':  c = '\033';  break;
-				case 'f':  c = '\f';  break;
-				case 'n':  c = '\n';  break;
-				case 'r':  c = '\r';  break;
-				case 't':  c = '\t';  break;
-				case 'v':  c = '\v';  break;
-				case '\\':  break;		/* c = '\\' */
-				case '0':
-					c = 0;
-					count = 3;
-					while (--count >= 0 && (unsigned)(*p - '0') < 8)
-						c = (c << 3) + (*p++ - '0');
-					break;
-				default:
-					p--;
-					break;
-				}
-			}
-			putchar(c);
-		}
-		if (*ap)
-			putchar(' ');
-	}
-	if (! nflag)
-		putchar('\n');
-	return 0;
-}
diff --git a/bin/1sh/error.c b/bin/1sh/error.c
deleted file mode 100644
index 02680718..00000000
--- a/bin/1sh/error.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)error.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/error.c 314436 2017-02-28 23:42:47Z imp $");
-
-/*
- * Errors and exceptions.
- */
-
-#include "shell.h"
-#include "eval.h"
-#include "main.h"
-#include "options.h"
-#include "output.h"
-#include "error.h"
-#include "nodes.h" /* show.h needs nodes.h */
-#include "show.h"
-#include "trap.h"
-#include <signal.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-
-
-/*
- * Code to handle exceptions in C.
- */
-
-struct jmploc *handler;
-volatile sig_atomic_t exception;
-volatile sig_atomic_t suppressint;
-volatile sig_atomic_t intpending;
-
-
-static void exverror(int, const char *, va_list) __printf0like(2, 0) __dead2;
-
-/*
- * Called to raise an exception.  Since C doesn't include exceptions, we
- * just do a longjmp to the exception handler.  The type of exception is
- * stored in the global variable "exception".
- *
- * Interrupts are disabled; they should be reenabled when the exception is
- * caught.
- */
-
-void
-exraise(int e)
-{
-	INTOFF;
-	if (handler == NULL)
-		abort();
-	exception = e;
-	longjmp(handler->loc, 1);
-}
-
-
-/*
- * Called from trap.c when a SIGINT is received and not suppressed, or when
- * an interrupt is pending and interrupts are re-enabled using INTON.
- * (If the user specifies that SIGINT is to be trapped or ignored using the
- * trap builtin, then this routine is not called.)  Suppressint is nonzero
- * when interrupts are held using the INTOFF macro.  If SIGINTs are not
- * suppressed and the shell is not a root shell, then we want to be
- * terminated if we get here, as if we were terminated directly by a SIGINT.
- * Arrange for this here.
- */
-
-void
-onint(void)
-{
-	sigset_t sigs;
-
-	intpending = 0;
-	sigemptyset(&sigs);
-	sigprocmask(SIG_SETMASK, &sigs, NULL);
-
-	/*
-	 * This doesn't seem to be needed, since main() emits a newline.
-	 */
-#if 0
-	if (tcgetpgrp(0) == getpid())
-		write(STDERR_FILENO, "\n", 1);
-#endif
-	if (rootshell && iflag)
-		exraise(EXINT);
-	else {
-		signal(SIGINT, SIG_DFL);
-		kill(getpid(), SIGINT);
-		_exit(128 + SIGINT);
-	}
-}
-
-
-static void
-vwarning(const char *msg, va_list ap)
-{
-	if (commandname)
-		outfmt(out2, "%s: ", commandname);
-	else if (arg0)
-		outfmt(out2, "%s: ", arg0);
-	doformat(out2, msg, ap);
-	out2fmt_flush("\n");
-}
-
-
-void
-warning(const char *msg, ...)
-{
-	va_list ap;
-	va_start(ap, msg);
-	vwarning(msg, ap);
-	va_end(ap);
-}
-
-
-/*
- * Exverror is called to raise the error exception.  If the first argument
- * is not NULL then error prints an error message using printf style
- * formatting.  It then raises the error exception.
- */
-static void
-exverror(int cond, const char *msg, va_list ap)
-{
-	/*
-	 * An interrupt trumps an error.  Certain places catch error
-	 * exceptions or transform them to a plain nonzero exit code
-	 * in child processes, and if an error exception can be handled,
-	 * an interrupt can be handled as well.
-	 *
-	 * exraise() will disable interrupts for the exception handler.
-	 */
-	FORCEINTON;
-
-#ifdef DEBUG
-	if (msg)
-		TRACE(("exverror(%d, \"%s\") pid=%d\n", cond, msg, getpid()));
-	else
-		TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
-#endif
-	if (msg)
-		vwarning(msg, ap);
-	flushall();
-	exraise(cond);
-}
-
-
-void
-error(const char *msg, ...)
-{
-	va_list ap;
-	va_start(ap, msg);
-	exverror(EXERROR, msg, ap);
-	va_end(ap);
-}
-
-
-void
-exerror(int cond, const char *msg, ...)
-{
-	va_list ap;
-	va_start(ap, msg);
-	exverror(cond, msg, ap);
-	va_end(ap);
-}
diff --git a/bin/1sh/error.h b/bin/1sh/error.h
deleted file mode 100644
index 8efd5b38..00000000
--- a/bin/1sh/error.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)error.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/error.h 319591 2017-06-04 21:58:02Z jilles $
- */
-
-/*
- * We enclose jmp_buf in a structure so that we can declare pointers to
- * jump locations.  The global variable handler contains the location to
- * jump to when an exception occurs, and the global variable exception
- * contains a code identifying the exception.  To implement nested
- * exception handlers, the user should save the value of handler on entry
- * to an inner scope, set handler to point to a jmploc structure for the
- * inner scope, and restore handler on exit from the scope.
- */
-
-#include <setjmp.h>
-#include <signal.h>
-
-struct jmploc {
-	jmp_buf loc;
-};
-
-extern struct jmploc *handler;
-extern volatile sig_atomic_t exception;
-
-/* exceptions */
-#define EXINT 0		/* SIGINT received */
-#define EXERROR 1	/* a generic error */
-#define EXEXEC 2	/* command execution failed */
-#define EXEXIT 3	/* call exitshell(exitstatus) */
-
-
-/*
- * These macros allow the user to suspend the handling of interrupt signals
- * over a period of time.  This is similar to SIGHOLD to or sigblock, but
- * much more efficient and portable.  (But hacking the kernel is so much
- * more fun than worrying about efficiency and portability. :-))
- */
-
-extern volatile sig_atomic_t suppressint;
-extern volatile sig_atomic_t intpending;
-
-#define INTOFF suppressint++
-#define INTON { if (--suppressint == 0 && intpending) onint(); }
-#define is_int_on() suppressint
-#define SETINTON(s) do { suppressint = (s); if (suppressint == 0 && intpending) onint(); } while (0)
-#define FORCEINTON {suppressint = 0; if (intpending) onint();}
-#define SET_PENDING_INT intpending = 1
-#define CLEAR_PENDING_INT intpending = 0
-#define int_pending() intpending
-
-void exraise(int) __dead2;
-void onint(void) __dead2;
-void warning(const char *, ...) __printflike(1, 2);
-void error(const char *, ...) __printf0like(1, 2) __dead2;
-void exerror(int, const char *, ...) __printf0like(2, 3) __dead2;
-
-
-/*
- * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
- * so we use _setjmp instead.
- */
-
-#define setjmp(jmploc)	_setjmp(jmploc)
-#define longjmp(jmploc, val)	_longjmp(jmploc, val)
diff --git a/bin/1sh/eval.c b/bin/1sh/eval.c
deleted file mode 100644
index 5a5289e1..00000000
--- a/bin/1sh/eval.c
+++ /dev/null
@@ -1,1381 +0,0 @@
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)eval.c	8.9 (Berkeley) 6/8/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/eval.c 327212 2017-12-26 16:23:18Z jilles $");
-
-#include <paths.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/resource.h>
-#include <errno.h>
-
-/*
- * Evaluate a command.
- */
-
-#include "shell.h"
-#include "nodes.h"
-#include "syntax.h"
-#include "expand.h"
-#include "parser.h"
-#include "jobs.h"
-#include "eval.h"
-#include "builtins.h"
-#include "options.h"
-#include "exec.h"
-#include "redir.h"
-#include "input.h"
-#include "output.h"
-#include "trap.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "show.h"
-#include "mystring.h"
-#ifndef NO_HISTORY
-#include "myhistedit.h"
-#endif
-
-
-int evalskip;			/* set if we are skipping commands */
-int skipcount;			/* number of levels to skip */
-static int loopnest;		/* current loop nesting level */
-int funcnest;			/* depth of function calls */
-static int builtin_flags;	/* evalcommand flags for builtins */
-
-
-char *commandname;
-struct arglist *cmdenviron;
-int exitstatus;			/* exit status of last command */
-int oexitstatus;		/* saved exit status */
-
-
-static void evalloop(union node *, int);
-static void evalfor(union node *, int);
-static union node *evalcase(union node *);
-static void evalsubshell(union node *, int);
-static void evalredir(union node *, int);
-static void exphere(union node *, struct arglist *);
-static void expredir(union node *);
-static void evalpipe(union node *);
-static int is_valid_fast_cmdsubst(union node *n);
-static void evalcommand(union node *, int, struct backcmd *);
-static void prehash(union node *);
-
-
-/*
- * Called to reset things after an exception.
- */
-
-void
-reseteval(void)
-{
-	evalskip = 0;
-	loopnest = 0;
-}
-
-
-/*
- * The eval command.
- */
-
-int
-evalcmd(int argc, char **argv)
-{
-        char *p;
-        char *concat;
-        char **ap;
-
-        if (argc > 1) {
-                p = argv[1];
-                if (argc > 2) {
-                        STARTSTACKSTR(concat);
-                        ap = argv + 2;
-                        for (;;) {
-                                STPUTS(p, concat);
-                                if ((p = *ap++) == NULL)
-                                        break;
-                                STPUTC(' ', concat);
-                        }
-                        STPUTC('\0', concat);
-                        p = grabstackstr(concat);
-                }
-                evalstring(p, builtin_flags);
-        } else
-                exitstatus = 0;
-        return exitstatus;
-}
-
-
-/*
- * Execute a command or commands contained in a string.
- */
-
-void
-evalstring(const char *s, int flags)
-{
-	union node *n;
-	struct stackmark smark;
-	int flags_exit;
-	int any;
-
-	flags_exit = flags & EV_EXIT;
-	flags &= ~EV_EXIT;
-	any = 0;
-	setstackmark(&smark);
-	setinputstring(s, 1);
-	while ((n = parsecmd(0)) != NEOF) {
-		if (n != NULL && !nflag) {
-			if (flags_exit && preadateof())
-				evaltree(n, flags | EV_EXIT);
-			else
-				evaltree(n, flags);
-			any = 1;
-			if (evalskip)
-				break;
-		}
-		popstackmark(&smark);
-		setstackmark(&smark);
-	}
-	popfile();
-	popstackmark(&smark);
-	if (!any)
-		exitstatus = 0;
-	if (flags_exit)
-		exraise(EXEXIT);
-}
-
-
-/*
- * Evaluate a parse tree.  The value is left in the global variable
- * exitstatus.
- */
-
-void
-evaltree(union node *n, int flags)
-{
-	int do_etest;
-	union node *next;
-	struct stackmark smark;
-
-	setstackmark(&smark);
-	do_etest = 0;
-	if (n == NULL) {
-		TRACE(("evaltree(NULL) called\n"));
-		exitstatus = 0;
-		goto out;
-	}
-	do {
-		next = NULL;
-#ifndef NO_HISTORY
-		displayhist = 1;	/* show history substitutions done with fc */
-#endif
-		TRACE(("evaltree(%p: %d) called\n", (void *)n, n->type));
-		switch (n->type) {
-		case NSEMI:
-			evaltree(n->nbinary.ch1, flags & ~EV_EXIT);
-			if (evalskip)
-				goto out;
-			next = n->nbinary.ch2;
-			break;
-		case NAND:
-			evaltree(n->nbinary.ch1, EV_TESTED);
-			if (evalskip || exitstatus != 0) {
-				goto out;
-			}
-			next = n->nbinary.ch2;
-			break;
-		case NOR:
-			evaltree(n->nbinary.ch1, EV_TESTED);
-			if (evalskip || exitstatus == 0)
-				goto out;
-			next = n->nbinary.ch2;
-			break;
-		case NREDIR:
-			evalredir(n, flags);
-			break;
-		case NSUBSHELL:
-			evalsubshell(n, flags);
-			do_etest = !(flags & EV_TESTED);
-			break;
-		case NBACKGND:
-			evalsubshell(n, flags);
-			break;
-		case NIF: {
-			evaltree(n->nif.test, EV_TESTED);
-			if (evalskip)
-				goto out;
-			if (exitstatus == 0)
-				next = n->nif.ifpart;
-			else if (n->nif.elsepart)
-				next = n->nif.elsepart;
-			else
-				exitstatus = 0;
-			break;
-		}
-		case NWHILE:
-		case NUNTIL:
-			evalloop(n, flags & ~EV_EXIT);
-			break;
-		case NFOR:
-			evalfor(n, flags & ~EV_EXIT);
-			break;
-		case NCASE:
-			next = evalcase(n);
-			break;
-		case NCLIST:
-			next = n->nclist.body;
-			break;
-		case NCLISTFALLTHRU:
-			if (n->nclist.body) {
-				evaltree(n->nclist.body, flags & ~EV_EXIT);
-				if (evalskip)
-					goto out;
-			}
-			next = n->nclist.next;
-			break;
-		case NDEFUN:
-			defun(n->narg.text, n->narg.next);
-			exitstatus = 0;
-			break;
-		case NNOT:
-			evaltree(n->nnot.com, EV_TESTED);
-			if (evalskip)
-				goto out;
-			exitstatus = !exitstatus;
-			break;
-
-		case NPIPE:
-			evalpipe(n);
-			do_etest = !(flags & EV_TESTED);
-			break;
-		case NCMD:
-			evalcommand(n, flags, (struct backcmd *)NULL);
-			do_etest = !(flags & EV_TESTED);
-			break;
-		default:
-			out1fmt("Node type = %d\n", n->type);
-			flushout(&output);
-			break;
-		}
-		n = next;
-		popstackmark(&smark);
-		setstackmark(&smark);
-	} while (n != NULL);
-out:
-	popstackmark(&smark);
-	if (pendingsig)
-		dotrap();
-	if (eflag && exitstatus != 0 && do_etest)
-		exitshell(exitstatus);
-	if (flags & EV_EXIT)
-		exraise(EXEXIT);
-}
-
-
-static void
-evalloop(union node *n, int flags)
-{
-	int status;
-
-	loopnest++;
-	status = 0;
-	for (;;) {
-		if (!evalskip)
-			evaltree(n->nbinary.ch1, EV_TESTED);
-		if (evalskip) {
-			if (evalskip == SKIPCONT && --skipcount <= 0) {
-				evalskip = 0;
-				continue;
-			}
-			if (evalskip == SKIPBREAK && --skipcount <= 0)
-				evalskip = 0;
-			if (evalskip == SKIPRETURN)
-				status = exitstatus;
-			break;
-		}
-		if (n->type == NWHILE) {
-			if (exitstatus != 0)
-				break;
-		} else {
-			if (exitstatus == 0)
-				break;
-		}
-		evaltree(n->nbinary.ch2, flags);
-		status = exitstatus;
-	}
-	loopnest--;
-	exitstatus = status;
-}
-
-
-
-static void
-evalfor(union node *n, int flags)
-{
-	struct arglist arglist;
-	union node *argp;
-	int i;
-	int status;
-
-	emptyarglist(&arglist);
-	for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
-		oexitstatus = exitstatus;
-		expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
-	}
-
-	loopnest++;
-	status = 0;
-	for (i = 0; i < arglist.count; i++) {
-		setvar(n->nfor.var, arglist.args[i], 0);
-		evaltree(n->nfor.body, flags);
-		status = exitstatus;
-		if (evalskip) {
-			if (evalskip == SKIPCONT && --skipcount <= 0) {
-				evalskip = 0;
-				continue;
-			}
-			if (evalskip == SKIPBREAK && --skipcount <= 0)
-				evalskip = 0;
-			break;
-		}
-	}
-	loopnest--;
-	exitstatus = status;
-}
-
-
-/*
- * Evaluate a case statement, returning the selected tree.
- *
- * The exit status needs care to get right.
- */
-
-static union node *
-evalcase(union node *n)
-{
-	union node *cp;
-	union node *patp;
-	struct arglist arglist;
-
-	emptyarglist(&arglist);
-	oexitstatus = exitstatus;
-	expandarg(n->ncase.expr, &arglist, EXP_TILDE);
-	for (cp = n->ncase.cases ; cp ; cp = cp->nclist.next) {
-		for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
-			if (casematch(patp, arglist.args[0])) {
-				while (cp->nclist.next &&
-				    cp->type == NCLISTFALLTHRU &&
-				    cp->nclist.body == NULL)
-					cp = cp->nclist.next;
-				if (cp->nclist.next &&
-				    cp->type == NCLISTFALLTHRU)
-					return (cp);
-				if (cp->nclist.body == NULL)
-					exitstatus = 0;
-				return (cp->nclist.body);
-			}
-		}
-	}
-	exitstatus = 0;
-	return (NULL);
-}
-
-
-
-/*
- * Kick off a subshell to evaluate a tree.
- */
-
-static void
-evalsubshell(union node *n, int flags)
-{
-	struct job *jp;
-	int backgnd = (n->type == NBACKGND);
-
-	oexitstatus = exitstatus;
-	expredir(n->nredir.redirect);
-	if ((!backgnd && flags & EV_EXIT && !have_traps()) ||
-			forkshell(jp = makejob(n, 1), n, backgnd) == 0) {
-		if (backgnd)
-			flags &=~ EV_TESTED;
-		redirect(n->nredir.redirect, 0);
-		evaltree(n->nredir.n, flags | EV_EXIT);	/* never returns */
-	} else if (! backgnd) {
-		INTOFF;
-		exitstatus = waitforjob(jp, (int *)NULL);
-		INTON;
-	} else
-		exitstatus = 0;
-}
-
-
-/*
- * Evaluate a redirected compound command.
- */
-
-static void
-evalredir(union node *n, int flags)
-{
-	struct jmploc jmploc;
-	struct jmploc *savehandler;
-	volatile int in_redirect = 1;
-
-	oexitstatus = exitstatus;
-	expredir(n->nredir.redirect);
-	savehandler = handler;
-	if (setjmp(jmploc.loc)) {
-		int e;
-
-		handler = savehandler;
-		e = exception;
-		popredir();
-		if (e == EXERROR || e == EXEXEC) {
-			if (in_redirect) {
-				exitstatus = 2;
-				FORCEINTON;
-				return;
-			}
-		}
-		longjmp(handler->loc, 1);
-	} else {
-		INTOFF;
-		handler = &jmploc;
-		redirect(n->nredir.redirect, REDIR_PUSH);
-		in_redirect = 0;
-		INTON;
-		evaltree(n->nredir.n, flags);
-	}
-	INTOFF;
-	handler = savehandler;
-	popredir();
-	INTON;
-}
-
-
-static void
-exphere(union node *redir, struct arglist *fn)
-{
-	struct jmploc jmploc;
-	struct jmploc *savehandler;
-	struct localvar *savelocalvars;
-	int need_longjmp = 0;
-	unsigned char saveoptreset;
-
-	redir->nhere.expdoc = "";
-	savelocalvars = localvars;
-	localvars = NULL;
-	saveoptreset = shellparam.reset;
-	forcelocal++;
-	savehandler = handler;
-	if (setjmp(jmploc.loc))
-		need_longjmp = exception != EXERROR && exception != EXEXEC;
-	else {
-		handler = &jmploc;
-		expandarg(redir->nhere.doc, fn, 0);
-		redir->nhere.expdoc = fn->args[0];
-		INTOFF;
-	}
-	handler = savehandler;
-	forcelocal--;
-	poplocalvars();
-	localvars = savelocalvars;
-	shellparam.reset = saveoptreset;
-	if (need_longjmp)
-		longjmp(handler->loc, 1);
-	INTON;
-}
-
-
-/*
- * Compute the names of the files in a redirection list.
- */
-
-static void
-expredir(union node *n)
-{
-	union node *redir;
-
-	for (redir = n ; redir ; redir = redir->nfile.next) {
-		struct arglist fn;
-		emptyarglist(&fn);
-		switch (redir->type) {
-		case NFROM:
-		case NTO:
-		case NFROMTO:
-		case NAPPEND:
-		case NCLOBBER:
-			expandarg(redir->nfile.fname, &fn, EXP_TILDE);
-			redir->nfile.expfname = fn.args[0];
-			break;
-		case NFROMFD:
-		case NTOFD:
-			if (redir->ndup.vname) {
-				expandarg(redir->ndup.vname, &fn, EXP_TILDE);
-				fixredir(redir, fn.args[0], 1);
-			}
-			break;
-		case NXHERE:
-			exphere(redir, &fn);
-			break;
-		}
-	}
-}
-
-
-
-/*
- * Evaluate a pipeline.  All the processes in the pipeline are children
- * of the process creating the pipeline.  (This differs from some versions
- * of the shell, which make the last process in a pipeline the parent
- * of all the rest.)
- */
-
-static void
-evalpipe(union node *n)
-{
-	struct job *jp;
-	struct nodelist *lp;
-	int pipelen;
-	int prevfd;
-	int pip[2];
-
-	TRACE(("evalpipe(%p) called\n", (void *)n));
-	pipelen = 0;
-	for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
-		pipelen++;
-	INTOFF;
-	jp = makejob(n, pipelen);
-	prevfd = -1;
-	for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
-		prehash(lp->n);
-		pip[1] = -1;
-		if (lp->next) {
-			if (pipe(pip) < 0) {
-				if (prevfd >= 0)
-					close(prevfd);
-				error("Pipe call failed: %s", strerror(errno));
-			}
-		}
-		if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
-			INTON;
-			if (prevfd > 0) {
-				dup2(prevfd, 0);
-				close(prevfd);
-			}
-			if (pip[1] >= 0) {
-				if (!(prevfd >= 0 && pip[0] == 0))
-					close(pip[0]);
-				if (pip[1] != 1) {
-					dup2(pip[1], 1);
-					close(pip[1]);
-				}
-			}
-			evaltree(lp->n, EV_EXIT);
-		}
-		if (prevfd >= 0)
-			close(prevfd);
-		prevfd = pip[0];
-		if (pip[1] != -1)
-			close(pip[1]);
-	}
-	INTON;
-	if (n->npipe.backgnd == 0) {
-		INTOFF;
-		exitstatus = waitforjob(jp, (int *)NULL);
-		TRACE(("evalpipe:  job done exit status %d\n", exitstatus));
-		INTON;
-	} else
-		exitstatus = 0;
-}
-
-
-
-static int
-is_valid_fast_cmdsubst(union node *n)
-{
-
-	return (n->type == NCMD);
-}
-
-/*
- * Execute a command inside back quotes.  If it's a builtin command, we
- * want to save its output in a block obtained from malloc.  Otherwise
- * we fork off a subprocess and get the output of the command via a pipe.
- * Should be called with interrupts off.
- */
-
-void
-evalbackcmd(union node *n, struct backcmd *result)
-{
-	int pip[2];
-	struct job *jp;
-	struct stackmark smark;
-	struct jmploc jmploc;
-	struct jmploc *savehandler;
-	struct localvar *savelocalvars;
-	unsigned char saveoptreset;
-
-	result->fd = -1;
-	result->buf = NULL;
-	result->nleft = 0;
-	result->jp = NULL;
-	if (n == NULL) {
-		exitstatus = 0;
-		return;
-	}
-	setstackmark(&smark);
-	exitstatus = oexitstatus;
-	if (is_valid_fast_cmdsubst(n)) {
-		savelocalvars = localvars;
-		localvars = NULL;
-		saveoptreset = shellparam.reset;
-		forcelocal++;
-		savehandler = handler;
-		if (setjmp(jmploc.loc)) {
-			if (exception == EXERROR || exception == EXEXEC)
-				exitstatus = 2;
-			else if (exception != 0) {
-				handler = savehandler;
-				forcelocal--;
-				poplocalvars();
-				localvars = savelocalvars;
-				shellparam.reset = saveoptreset;
-				longjmp(handler->loc, 1);
-			}
-		} else {
-			handler = &jmploc;
-			evalcommand(n, EV_BACKCMD, result);
-		}
-		handler = savehandler;
-		forcelocal--;
-		poplocalvars();
-		localvars = savelocalvars;
-		shellparam.reset = saveoptreset;
-	} else {
-		if (pipe(pip) < 0)
-			error("Pipe call failed: %s", strerror(errno));
-		jp = makejob(n, 1);
-		if (forkshell(jp, n, FORK_NOJOB) == 0) {
-			FORCEINTON;
-			close(pip[0]);
-			if (pip[1] != 1) {
-				dup2(pip[1], 1);
-				close(pip[1]);
-			}
-			evaltree(n, EV_EXIT);
-		}
-		close(pip[1]);
-		result->fd = pip[0];
-		result->jp = jp;
-	}
-	popstackmark(&smark);
-	TRACE(("evalbackcmd done: fd=%d buf=%p nleft=%d jp=%p\n",
-		result->fd, result->buf, result->nleft, result->jp));
-}
-
-static int
-mustexpandto(const char *argtext, const char *mask)
-{
-	for (;;) {
-		if (*argtext == CTLQUOTEMARK || *argtext == CTLQUOTEEND) {
-			argtext++;
-			continue;
-		}
-		if (*argtext == CTLESC)
-			argtext++;
-		else if (BASESYNTAX[(int)*argtext] == CCTL)
-			return (0);
-		if (*argtext != *mask)
-			return (0);
-		if (*argtext == '\0')
-			return (1);
-		argtext++;
-		mask++;
-	}
-}
-
-static int
-isdeclarationcmd(struct narg *arg)
-{
-	int have_command = 0;
-
-	if (arg == NULL)
-		return (0);
-	while (mustexpandto(arg->text, "command")) {
-		have_command = 1;
-		arg = &arg->next->narg;
-		if (arg == NULL)
-			return (0);
-		/*
-		 * To also allow "command -p" and "command --" as part of
-		 * a declaration command, add code here.
-		 * We do not do this, as ksh does not do it either and it
-		 * is not required by POSIX.
-		 */
-	}
-	return (mustexpandto(arg->text, "export") ||
-	    mustexpandto(arg->text, "readonly") ||
-	    (mustexpandto(arg->text, "local") &&
-		(have_command || !isfunc("local"))));
-}
-
-static void
-xtracecommand(struct arglist *varlist, int argc, char **argv)
-{
-	char sep = 0;
-	const char *text, *p, *ps4;
-	int i;
-
-	ps4 = expandstr(ps4val());
-	out2str(ps4 != NULL ? ps4 : ps4val());
-	for (i = 0; i < varlist->count; i++) {
-		text = varlist->args[i];
-		if (sep != 0)
-			out2c(' ');
-		p = strchr(text, '=');
-		if (p != NULL) {
-			p++;
-			outbin(text, p - text, out2);
-			out2qstr(p);
-		} else
-			out2qstr(text);
-		sep = ' ';
-	}
-	for (i = 0; i < argc; i++) {
-		text = argv[i];
-		if (sep != 0)
-			out2c(' ');
-		out2qstr(text);
-		sep = ' ';
-	}
-	out2c('\n');
-	flushout(&errout);
-}
-
-/*
- * Check if a builtin can safely be executed in the same process,
- * even though it should be in a subshell (command substitution).
- * Note that jobid, jobs, times and trap can show information not
- * available in a child process; this is deliberate.
- * The arguments should already have been expanded.
- */
-static int
-safe_builtin(int idx, int argc, char **argv)
-{
-	/* Generated from builtins.def. */
-	if (safe_builtin_always(idx))
-		return (1);
-	if (idx == EXPORTCMD || idx == TRAPCMD || idx == ULIMITCMD ||
-	    idx == UMASKCMD)
-		return (argc <= 1 || (argc == 2 && argv[1][0] == '-'));
-	if (idx == SETCMD)
-		return (argc <= 1 || (argc == 2 && (argv[1][0] == '-' ||
-		    argv[1][0] == '+') && argv[1][1] == 'o' &&
-		    argv[1][2] == '\0'));
-	return (0);
-}
-
-/*
- * Execute a simple command.
- * Note: This may or may not return if (flags & EV_EXIT).
- */
-
-static void
-evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
-{
-	union node *argp;
-	struct arglist arglist;
-	struct arglist varlist;
-	char **argv;
-	int argc;
-	char **envp;
-	int varflag;
-	int mode;
-	int pip[2];
-	struct cmdentry cmdentry;
-	struct job *jp;
-	struct jmploc jmploc;
-	struct jmploc *savehandler;
-	char *savecmdname;
-	struct shparam saveparam;
-	struct localvar *savelocalvars;
-	struct parsefile *savetopfile;
-	volatile int e;
-	char *lastarg;
-	int signaled;
-	int do_clearcmdentry;
-	const char *path = pathval();
-	int i;
-
-	/* First expand the arguments. */
-	TRACE(("evalcommand(%p, %d) called\n", (void *)cmd, flags));
-	emptyarglist(&arglist);
-	emptyarglist(&varlist);
-	varflag = 1;
-	jp = NULL;
-	do_clearcmdentry = 0;
-	oexitstatus = exitstatus;
-	exitstatus = 0;
-	/* Add one slot at the beginning for tryexec(). */
-	appendarglist(&arglist, nullstr);
-	for (argp = cmd->ncmd.args ; argp ; argp = argp->narg.next) {
-		if (varflag && isassignment(argp->narg.text)) {
-			expandarg(argp, varflag == 1 ? &varlist : &arglist,
-			    EXP_VARTILDE);
-			continue;
-		} else if (varflag == 1)
-			varflag = isdeclarationcmd(&argp->narg) ? 2 : 0;
-		expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
-	}
-	appendarglist(&arglist, nullstr);
-	expredir(cmd->ncmd.redirect);
-	argc = arglist.count - 2;
-	argv = &arglist.args[1];
-
-	argv[argc] = NULL;
-	lastarg = NULL;
-	if (iflag && funcnest == 0 && argc > 0)
-		lastarg = argv[argc - 1];
-
-	/* Print the command if xflag is set. */
-	if (xflag)
-		xtracecommand(&varlist, argc, argv);
-
-	/* Now locate the command. */
-	if (argc == 0) {
-		/* Variable assignment(s) without command */
-		cmdentry.cmdtype = CMDBUILTIN;
-		cmdentry.u.index = BLTINCMD;
-		cmdentry.special = 0;
-	} else {
-		static const char PATH[] = "PATH=";
-		int cmd_flags = 0, bltinonly = 0;
-
-		/*
-		 * Modify the command lookup path, if a PATH= assignment
-		 * is present
-		 */
-		for (i = 0; i < varlist.count; i++)
-			if (strncmp(varlist.args[i], PATH, sizeof(PATH) - 1) == 0) {
-				path = varlist.args[i] + sizeof(PATH) - 1;
-				/*
-				 * On `PATH=... command`, we need to make
-				 * sure that the command isn't using the
-				 * non-updated hash table of the outer PATH
-				 * setting and we need to make sure that
-				 * the hash table isn't filled with items
-				 * from the temporary setting.
-				 *
-				 * It would be better to forbit using and
-				 * updating the table while this command
-				 * runs, by the command finding mechanism
-				 * is heavily integrated with hash handling,
-				 * so we just delete the hash before and after
-				 * the command runs. Partly deleting like
-				 * changepatch() does doesn't seem worth the
-				 * bookinging effort, since most such runs add
-				 * directories in front of the new PATH.
-				 */
-				clearcmdentry();
-				do_clearcmdentry = 1;
-			}
-
-		for (;;) {
-			if (bltinonly) {
-				cmdentry.u.index = find_builtin(*argv, &cmdentry.special);
-				if (cmdentry.u.index < 0) {
-					cmdentry.u.index = BLTINCMD;
-					argv--;
-					argc++;
-					break;
-				}
-			} else
-				find_command(argv[0], &cmdentry, cmd_flags, path);
-			/* implement the bltin and command builtins here */
-			if (cmdentry.cmdtype != CMDBUILTIN)
-				break;
-			if (cmdentry.u.index == BLTINCMD) {
-				if (argc == 1)
-					break;
-				argv++;
-				argc--;
-				bltinonly = 1;
-			} else if (cmdentry.u.index == COMMANDCMD) {
-				if (argc == 1)
-					break;
-				if (!strcmp(argv[1], "-p")) {
-					if (argc == 2)
-						break;
-					if (argv[2][0] == '-') {
-						if (strcmp(argv[2], "--"))
-							break;
-						if (argc == 3)
-							break;
-						argv += 3;
-						argc -= 3;
-					} else {
-						argv += 2;
-						argc -= 2;
-					}
-					path = _PATH_STDPATH;
-					clearcmdentry();
-					do_clearcmdentry = 1;
-				} else if (!strcmp(argv[1], "--")) {
-					if (argc == 2)
-						break;
-					argv += 2;
-					argc -= 2;
-				} else if (argv[1][0] == '-')
-					break;
-				else {
-					argv++;
-					argc--;
-				}
-				cmd_flags |= DO_NOFUNC;
-				bltinonly = 0;
-			} else
-				break;
-		}
-		/*
-		 * Special builtins lose their special properties when
-		 * called via 'command'.
-		 */
-		if (cmd_flags & DO_NOFUNC)
-			cmdentry.special = 0;
-	}
-
-	/* Fork off a child process if necessary. */
-	if (((cmdentry.cmdtype == CMDNORMAL || cmdentry.cmdtype == CMDUNKNOWN)
-	    && ((flags & EV_EXIT) == 0 || have_traps()))
-	 || ((flags & EV_BACKCMD) != 0
-	    && (cmdentry.cmdtype != CMDBUILTIN ||
-		 !safe_builtin(cmdentry.u.index, argc, argv)))) {
-		jp = makejob(cmd, 1);
-		mode = FORK_FG;
-		if (flags & EV_BACKCMD) {
-			mode = FORK_NOJOB;
-			if (pipe(pip) < 0)
-				error("Pipe call failed: %s", strerror(errno));
-		}
-		if (cmdentry.cmdtype == CMDNORMAL &&
-		    cmd->ncmd.redirect == NULL &&
-		    varlist.count == 0 &&
-		    (mode == FORK_FG || mode == FORK_NOJOB) &&
-		    !disvforkset() && !iflag && !mflag) {
-			vforkexecshell(jp, argv, environment(), path,
-			    cmdentry.u.index, flags & EV_BACKCMD ? pip : NULL);
-			goto parent;
-		}
-		if (forkshell(jp, cmd, mode) != 0)
-			goto parent;	/* at end of routine */
-		if (flags & EV_BACKCMD) {
-			FORCEINTON;
-			close(pip[0]);
-			if (pip[1] != 1) {
-				dup2(pip[1], 1);
-				close(pip[1]);
-			}
-			flags &= ~EV_BACKCMD;
-		}
-		flags |= EV_EXIT;
-	}
-
-	/* This is the child process if a fork occurred. */
-	/* Execute the command. */
-	if (cmdentry.cmdtype == CMDFUNCTION) {
-#ifdef DEBUG
-		trputs("Shell function:  ");  trargs(argv);
-#endif
-		saveparam = shellparam;
-		shellparam.malloc = 0;
-		shellparam.reset = 1;
-		shellparam.nparam = argc - 1;
-		shellparam.p = argv + 1;
-		shellparam.optp = NULL;
-		shellparam.optnext = NULL;
-		INTOFF;
-		savelocalvars = localvars;
-		localvars = NULL;
-		reffunc(cmdentry.u.func);
-		savehandler = handler;
-		if (setjmp(jmploc.loc)) {
-			popredir();
-			unreffunc(cmdentry.u.func);
-			poplocalvars();
-			localvars = savelocalvars;
-			freeparam(&shellparam);
-			shellparam = saveparam;
-			funcnest--;
-			handler = savehandler;
-			longjmp(handler->loc, 1);
-		}
-		handler = &jmploc;
-		funcnest++;
-		redirect(cmd->ncmd.redirect, REDIR_PUSH);
-		INTON;
-		for (i = 0; i < varlist.count; i++)
-			mklocal(varlist.args[i]);
-		exitstatus = oexitstatus;
-		evaltree(getfuncnode(cmdentry.u.func),
-		    flags & (EV_TESTED | EV_EXIT));
-		INTOFF;
-		unreffunc(cmdentry.u.func);
-		poplocalvars();
-		localvars = savelocalvars;
-		freeparam(&shellparam);
-		shellparam = saveparam;
-		handler = savehandler;
-		funcnest--;
-		popredir();
-		INTON;
-		if (evalskip == SKIPRETURN) {
-			evalskip = 0;
-			skipcount = 0;
-		}
-		if (jp)
-			exitshell(exitstatus);
-	} else if (cmdentry.cmdtype == CMDBUILTIN) {
-#ifdef DEBUG
-		trputs("builtin command:  ");  trargs(argv);
-#endif
-		mode = (cmdentry.u.index == EXECCMD)? 0 : REDIR_PUSH;
-		if (flags == EV_BACKCMD) {
-			memout.nextc = memout.buf;
-			mode |= REDIR_BACKQ;
-		}
-		savecmdname = commandname;
-		savetopfile = getcurrentfile();
-		cmdenviron = &varlist;
-		e = -1;
-		savehandler = handler;
-		if (setjmp(jmploc.loc)) {
-			e = exception;
-			if (e == EXINT)
-				exitstatus = SIGINT+128;
-			else if (e != EXEXIT)
-				exitstatus = 2;
-			goto cmddone;
-		}
-		handler = &jmploc;
-		redirect(cmd->ncmd.redirect, mode);
-		outclearerror(out1);
-		/*
-		 * If there is no command word, redirection errors should
-		 * not be fatal but assignment errors should.
-		 */
-		if (argc == 0)
-			cmdentry.special = 1;
-		listsetvar(cmdenviron, cmdentry.special ? 0 : VNOSET);
-		if (argc > 0)
-			bltinsetlocale();
-		commandname = argv[0];
-		argptr = argv + 1;
-		nextopt_optptr = NULL;		/* initialize nextopt */
-		builtin_flags = flags;
-		exitstatus = (*builtinfunc[cmdentry.u.index])(argc, argv);
-		flushall();
-		if (outiserror(out1)) {
-			warning("write error on stdout");
-			if (exitstatus == 0 || exitstatus == 1)
-				exitstatus = 2;
-		}
-cmddone:
-		if (argc > 0)
-			bltinunsetlocale();
-		cmdenviron = NULL;
-		out1 = &output;
-		out2 = &errout;
-		freestdout();
-		handler = savehandler;
-		commandname = savecmdname;
-		if (jp)
-			exitshell(exitstatus);
-		if (flags == EV_BACKCMD) {
-			backcmd->buf = memout.buf;
-			backcmd->nleft = memout.buf != NULL ?
-			    memout.nextc - memout.buf : 0;
-			memout.buf = NULL;
-			memout.nextc = NULL;
-			memout.bufend = NULL;
-			memout.bufsize = 64;
-		}
-		if (cmdentry.u.index != EXECCMD)
-			popredir();
-		if (e != -1) {
-			if ((e != EXERROR && e != EXEXEC)
-			    || cmdentry.special)
-				exraise(e);
-			popfilesupto(savetopfile);
-			if (flags != EV_BACKCMD)
-				FORCEINTON;
-		}
-	} else {
-#ifdef DEBUG
-		trputs("normal command:  ");  trargs(argv);
-#endif
-		redirect(cmd->ncmd.redirect, 0);
-		for (i = 0; i < varlist.count; i++)
-			setvareq(varlist.args[i], VEXPORT|VSTACK);
-		envp = environment();
-		shellexec(argv, envp, path, cmdentry.u.index);
-		/*NOTREACHED*/
-	}
-	goto out;
-
-parent:	/* parent process gets here (if we forked) */
-	if (mode == FORK_FG) {	/* argument to fork */
-		INTOFF;
-		exitstatus = waitforjob(jp, &signaled);
-		INTON;
-		if (iflag && loopnest > 0 && signaled) {
-			evalskip = SKIPBREAK;
-			skipcount = loopnest;
-		}
-	} else if (mode == FORK_NOJOB) {
-		backcmd->fd = pip[0];
-		close(pip[1]);
-		backcmd->jp = jp;
-	}
-
-out:
-	if (lastarg)
-		setvar("_", lastarg, 0);
-	if (do_clearcmdentry)
-		clearcmdentry();
-}
-
-
-
-/*
- * Search for a command.  This is called before we fork so that the
- * location of the command will be available in the parent as well as
- * the child.  The check for "goodname" is an overly conservative
- * check that the name will not be subject to expansion.
- */
-
-static void
-prehash(union node *n)
-{
-	struct cmdentry entry;
-
-	if (n && n->type == NCMD && n->ncmd.args)
-		if (goodname(n->ncmd.args->narg.text))
-			find_command(n->ncmd.args->narg.text, &entry, 0,
-				     pathval());
-}
-
-
-
-/*
- * Builtin commands.  Builtin commands whose functions are closely
- * tied to evaluation are implemented here.
- */
-
-/*
- * No command given, a bltin command with no arguments, or a bltin command
- * with an invalid name.
- */
-
-int
-bltincmd(int argc, char **argv)
-{
-	if (argc > 1) {
-		out2fmt_flush("%s: not found\n", argv[1]);
-		return 127;
-	}
-	/*
-	 * Preserve exitstatus of a previous possible command substitution
-	 * as POSIX mandates
-	 */
-	return exitstatus;
-}
-
-
-/*
- * Handle break and continue commands.  Break, continue, and return are
- * all handled by setting the evalskip flag.  The evaluation routines
- * above all check this flag, and if it is set they start skipping
- * commands rather than executing them.  The variable skipcount is
- * the number of loops to break/continue, or the number of function
- * levels to return.  (The latter is always 1.)  It should probably
- * be an error to break out of more loops than exist, but it isn't
- * in the standard shell so we don't make it one here.
- */
-
-int
-breakcmd(int argc, char **argv)
-{
-	long n;
-	char *end;
-
-	if (argc > 1) {
-		/* Allow arbitrarily large numbers. */
-		n = strtol(argv[1], &end, 10);
-		if (!is_digit(argv[1][0]) || *end != '\0')
-			error("Illegal number: %s", argv[1]);
-	} else
-		n = 1;
-	if (n > loopnest)
-		n = loopnest;
-	if (n > 0) {
-		evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK;
-		skipcount = n;
-	}
-	return 0;
-}
-
-/*
- * The `command' command.
- */
-int
-commandcmd(int argc __unused, char **argv __unused)
-{
-	const char *path;
-	int ch;
-	int cmd = -1;
-
-	path = bltinlookup("PATH", 1);
-
-	while ((ch = nextopt("pvV")) != '\0') {
-		switch (ch) {
-		case 'p':
-			path = _PATH_STDPATH;
-			break;
-		case 'v':
-			cmd = TYPECMD_SMALLV;
-			break;
-		case 'V':
-			cmd = TYPECMD_BIGV;
-			break;
-		}
-	}
-
-	if (cmd != -1) {
-		if (*argptr == NULL || argptr[1] != NULL)
-			error("wrong number of arguments");
-		return typecmd_impl(2, argptr - 1, cmd, path);
-	}
-	if (*argptr != NULL)
-		error("commandcmd bad call");
-
-	/*
-	 * Do nothing successfully if no command was specified;
-	 * ksh also does this.
-	 */
-	return 0;
-}
-
-
-/*
- * The return command.
- */
-
-int
-returncmd(int argc, char **argv)
-{
-	int ret = argc > 1 ? number(argv[1]) : oexitstatus;
-
-	evalskip = SKIPRETURN;
-	skipcount = 1;
-	return ret;
-}
-
-
-int
-falsecmd(int argc __unused, char **argv __unused)
-{
-	return 1;
-}
-
-
-int
-truecmd(int argc __unused, char **argv __unused)
-{
-	return 0;
-}
-
-
-int
-execcmd(int argc, char **argv)
-{
-	int i;
-
-	/*
-	 * Because we have historically not supported any options,
-	 * only treat "--" specially.
-	 */
-	if (argc > 1 && strcmp(argv[1], "--") == 0)
-		argc--, argv++;
-	if (argc > 1) {
-		iflag = 0;		/* exit on error */
-		mflag = 0;
-		optschanged();
-		for (i = 0; i < cmdenviron->count; i++)
-			setvareq(cmdenviron->args[i], VEXPORT|VSTACK);
-		shellexec(argv + 1, environment(), pathval(), 0);
-
-	}
-	return 0;
-}
-
-
-int
-timescmd(int argc __unused, char **argv __unused)
-{
-	struct rusage ru;
-	long shumins, shsmins, chumins, chsmins;
-	double shusecs, shssecs, chusecs, chssecs;
-
-	if (getrusage(RUSAGE_SELF, &ru) < 0)
-		return 1;
-	shumins = ru.ru_utime.tv_sec / 60;
-	shusecs = ru.ru_utime.tv_sec % 60 + ru.ru_utime.tv_usec / 1000000.;
-	shsmins = ru.ru_stime.tv_sec / 60;
-	shssecs = ru.ru_stime.tv_sec % 60 + ru.ru_stime.tv_usec / 1000000.;
-	if (getrusage(RUSAGE_CHILDREN, &ru) < 0)
-		return 1;
-	chumins = ru.ru_utime.tv_sec / 60;
-	chusecs = ru.ru_utime.tv_sec % 60 + ru.ru_utime.tv_usec / 1000000.;
-	chsmins = ru.ru_stime.tv_sec / 60;
-	chssecs = ru.ru_stime.tv_sec % 60 + ru.ru_stime.tv_usec / 1000000.;
-	out1fmt("%ldm%.3fs %ldm%.3fs\n%ldm%.3fs %ldm%.3fs\n", shumins,
-	    shusecs, shsmins, shssecs, chumins, chusecs, chsmins, chssecs);
-	return 0;
-}
diff --git a/bin/1sh/eval.h b/bin/1sh/eval.h
deleted file mode 100644
index 7bfa0216..00000000
--- a/bin/1sh/eval.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)eval.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/eval.h 314436 2017-02-28 23:42:47Z imp $
- */
-
-extern char *commandname;	/* currently executing command */
-extern int exitstatus;		/* exit status of last command */
-extern int oexitstatus;		/* saved exit status */
-extern struct arglist *cmdenviron;  /* environment for builtin command */
-
-
-struct backcmd {		/* result of evalbackcmd */
-	int fd;			/* file descriptor to read from */
-	char *buf;		/* buffer */
-	int nleft;		/* number of chars in buffer */
-	struct job *jp;		/* job structure for command */
-};
-
-void reseteval(void);
-
-/* flags in argument to evaltree/evalstring */
-#define EV_EXIT 01		/* exit after evaluating tree */
-#define EV_TESTED 02		/* exit status is checked; ignore -e flag */
-#define EV_BACKCMD 04		/* command executing within back quotes */
-
-void evalstring(const char *, int);
-union node;	/* BLETCH for ansi C */
-void evaltree(union node *, int);
-void evalbackcmd(union node *, struct backcmd *);
-
-/* in_function returns nonzero if we are currently evaluating a function */
-#define in_function()	funcnest
-extern int funcnest;
-extern int evalskip;
-extern int skipcount;
-
-/* reasons for skipping commands (see comment on breakcmd routine) */
-#define SKIPBREAK	1
-#define SKIPCONT	2
-#define SKIPRETURN	3
diff --git a/bin/1sh/exec.c b/bin/1sh/exec.c
deleted file mode 100644
index 5026e644..00000000
--- a/bin/1sh/exec.c
+++ /dev/null
@@ -1,784 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)exec.c	8.4 (Berkeley) 6/8/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/exec.c 336320 2018-07-15 21:55:17Z jilles $");
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <paths.h>
-#include <stdlib.h>
-
-/*
- * When commands are first encountered, they are entered in a hash table.
- * This ensures that a full path search will not have to be done for them
- * on each invocation.
- *
- * We should investigate converting to a linear search, even though that
- * would make the command name "hash" a misnomer.
- */
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"
-#include "parser.h"
-#include "redir.h"
-#include "eval.h"
-#include "exec.h"
-#include "builtins.h"
-#include "var.h"
-#include "options.h"
-#include "input.h"
-#include "output.h"
-#include "syntax.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "show.h"
-#include "jobs.h"
-#include "alias.h"
-
-
-#define CMDTABLESIZE 31		/* should be prime */
-
-
-
-struct tblentry {
-	struct tblentry *next;	/* next entry in hash chain */
-	union param param;	/* definition of builtin function */
-	int special;		/* flag for special builtin commands */
-	signed char cmdtype;	/* index identifying command */
-	char cmdname[];		/* name of command */
-};
-
-
-static struct tblentry *cmdtable[CMDTABLESIZE];
-static int cmdtable_cd = 0;	/* cmdtable contains cd-dependent entries */
-int exerrno = 0;			/* Last exec error */
-
-
-static void tryexec(char *, char **, char **);
-static void printentry(struct tblentry *, int);
-static struct tblentry *cmdlookup(const char *, int);
-static void delete_cmd_entry(void);
-static void addcmdentry(const char *, struct cmdentry *);
-
-
-
-/*
- * Exec a program.  Never returns.  If you change this routine, you may
- * have to change the find_command routine as well.
- *
- * The argv array may be changed and element argv[-1] should be writable.
- */
-
-void
-shellexec(char **argv, char **envp, const char *path, int idx)
-{
-	char *cmdname;
-	const char *opt;
-	int e;
-
-	if (strchr(argv[0], '/') != NULL) {
-		tryexec(argv[0], argv, envp);
-		e = errno;
-	} else {
-		e = ENOENT;
-		while ((cmdname = padvance(&path, &opt, argv[0])) != NULL) {
-			if (--idx < 0 && opt == NULL) {
-				tryexec(cmdname, argv, envp);
-				if (errno != ENOENT && errno != ENOTDIR)
-					e = errno;
-				if (e == ENOEXEC)
-					break;
-			}
-			stunalloc(cmdname);
-		}
-	}
-
-	/* Map to POSIX errors */
-	if (e == ENOENT || e == ENOTDIR) {
-		exerrno = 127;
-		exerror(EXEXEC, "%s: not found", argv[0]);
-	} else {
-		exerrno = 126;
-		exerror(EXEXEC, "%s: %s", argv[0], strerror(e));
-	}
-}
-
-
-static void
-tryexec(char *cmd, char **argv, char **envp)
-{
-	int e, in;
-	ssize_t n;
-	char buf[256];
-
-	execve(cmd, argv, envp);
-	e = errno;
-	if (e == ENOEXEC) {
-		INTOFF;
-		in = open(cmd, O_RDONLY | O_NONBLOCK);
-		if (in != -1) {
-			n = pread(in, buf, sizeof buf, 0);
-			close(in);
-			if (n > 0 && memchr(buf, '\0', n) != NULL) {
-				errno = ENOEXEC;
-				return;
-			}
-		}
-		*argv = cmd;
-		*--argv = __DECONST(char *, _PATH_BSHELL);
-		execve(_PATH_BSHELL, argv, envp);
-	}
-	errno = e;
-}
-
-/*
- * Do a path search.  The variable path (passed by reference) should be
- * set to the start of the path before the first call; padvance will update
- * this value as it proceeds.  Successive calls to padvance will return
- * the possible path expansions in sequence.  If popt is not NULL, options
- * are processed: if an option (indicated by a percent sign) appears in
- * the path entry then *popt will be set to point to it; else *popt will be
- * set to NULL.  If popt is NULL, percent signs are not special.
- */
-
-char *
-padvance(const char **path, const char **popt, const char *name)
-{
-	const char *p, *start;
-	char *q;
-	size_t len, namelen;
-
-	if (*path == NULL)
-		return NULL;
-	start = *path;
-	if (popt != NULL)
-		for (p = start; *p && *p != ':' && *p != '%'; p++)
-			; /* nothing */
-	else
-		for (p = start; *p && *p != ':'; p++)
-			; /* nothing */
-	namelen = strlen(name);
-	len = p - start + namelen + 2;	/* "2" is for '/' and '\0' */
-	STARTSTACKSTR(q);
-	CHECKSTRSPACE(len, q);
-	if (p != start) {
-		memcpy(q, start, p - start);
-		q += p - start;
-		*q++ = '/';
-	}
-	memcpy(q, name, namelen + 1);
-	if (popt != NULL) {
-		if (*p == '%') {
-			*popt = ++p;
-			while (*p && *p != ':')  p++;
-		} else
-			*popt = NULL;
-	}
-	if (*p == ':')
-		*path = p + 1;
-	else
-		*path = NULL;
-	return stalloc(len);
-}
-
-
-
-/*** Command hashing code ***/
-
-
-int
-hashcmd(int argc __unused, char **argv __unused)
-{
-	struct tblentry **pp;
-	struct tblentry *cmdp;
-	int c;
-	int verbose;
-	struct cmdentry entry;
-	char *name;
-	int errors;
-
-	errors = 0;
-	verbose = 0;
-	while ((c = nextopt("rv")) != '\0') {
-		if (c == 'r') {
-			clearcmdentry();
-		} else if (c == 'v') {
-			verbose++;
-		}
-	}
-	if (*argptr == NULL) {
-		for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
-			for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
-				if (cmdp->cmdtype == CMDNORMAL)
-					printentry(cmdp, verbose);
-			}
-		}
-		return 0;
-	}
-	while ((name = *argptr) != NULL) {
-		if ((cmdp = cmdlookup(name, 0)) != NULL
-		 && cmdp->cmdtype == CMDNORMAL)
-			delete_cmd_entry();
-		find_command(name, &entry, DO_ERR, pathval());
-		if (entry.cmdtype == CMDUNKNOWN)
-			errors = 1;
-		else if (verbose) {
-			cmdp = cmdlookup(name, 0);
-			if (cmdp != NULL)
-				printentry(cmdp, verbose);
-			else {
-				outfmt(out2, "%s: not found\n", name);
-				errors = 1;
-			}
-			flushall();
-		}
-		argptr++;
-	}
-	return errors;
-}
-
-
-static void
-printentry(struct tblentry *cmdp, int verbose)
-{
-	int idx;
-	const char *path, *opt;
-	char *name;
-
-	if (cmdp->cmdtype == CMDNORMAL) {
-		idx = cmdp->param.index;
-		path = pathval();
-		do {
-			name = padvance(&path, &opt, cmdp->cmdname);
-			stunalloc(name);
-		} while (--idx >= 0);
-		out1str(name);
-	} else if (cmdp->cmdtype == CMDBUILTIN) {
-		out1fmt("builtin %s", cmdp->cmdname);
-	} else if (cmdp->cmdtype == CMDFUNCTION) {
-		out1fmt("function %s", cmdp->cmdname);
-		if (verbose) {
-			INTOFF;
-			name = commandtext(getfuncnode(cmdp->param.func));
-			out1c(' ');
-			out1str(name);
-			ckfree(name);
-			INTON;
-		}
-#ifdef DEBUG
-	} else {
-		error("internal error: cmdtype %d", cmdp->cmdtype);
-#endif
-	}
-	out1c('\n');
-}
-
-
-
-/*
- * Resolve a command name.  If you change this routine, you may have to
- * change the shellexec routine as well.
- */
-
-void
-find_command(const char *name, struct cmdentry *entry, int act,
-    const char *path)
-{
-	struct tblentry *cmdp, loc_cmd;
-	int idx;
-	const char *opt;
-	char *fullname;
-	struct stat statb;
-	int e;
-	int i;
-	int spec;
-	int cd;
-
-	/* If name contains a slash, don't use the hash table */
-	if (strchr(name, '/') != NULL) {
-		entry->cmdtype = CMDNORMAL;
-		entry->u.index = 0;
-		entry->special = 0;
-		return;
-	}
-
-	cd = 0;
-
-	/* If name is in the table, we're done */
-	if ((cmdp = cmdlookup(name, 0)) != NULL) {
-		if (cmdp->cmdtype == CMDFUNCTION && act & DO_NOFUNC)
-			cmdp = NULL;
-		else
-			goto success;
-	}
-
-	/* Check for builtin next */
-	if ((i = find_builtin(name, &spec)) >= 0) {
-		INTOFF;
-		cmdp = cmdlookup(name, 1);
-		if (cmdp->cmdtype == CMDFUNCTION)
-			cmdp = &loc_cmd;
-		cmdp->cmdtype = CMDBUILTIN;
-		cmdp->param.index = i;
-		cmdp->special = spec;
-		INTON;
-		goto success;
-	}
-
-	/* We have to search path. */
-
-	e = ENOENT;
-	idx = -1;
-	for (;(fullname = padvance(&path, &opt, name)) != NULL;
-	    stunalloc(fullname)) {
-		idx++;
-		if (opt) {
-			if (strncmp(opt, "func", 4) == 0) {
-				/* handled below */
-			} else {
-				continue; /* ignore unimplemented options */
-			}
-		}
-		if (fullname[0] != '/')
-			cd = 1;
-		if (stat(fullname, &statb) < 0) {
-			if (errno != ENOENT && errno != ENOTDIR)
-				e = errno;
-			continue;
-		}
-		e = EACCES;	/* if we fail, this will be the error */
-		if (!S_ISREG(statb.st_mode))
-			continue;
-		if (opt) {		/* this is a %func directory */
-			readcmdfile(fullname);
-			if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION)
-				error("%s not defined in %s", name, fullname);
-			stunalloc(fullname);
-			goto success;
-		}
-#ifdef notdef
-		if (statb.st_uid == geteuid()) {
-			if ((statb.st_mode & 0100) == 0)
-				goto loop;
-		} else if (statb.st_gid == getegid()) {
-			if ((statb.st_mode & 010) == 0)
-				goto loop;
-		} else {
-			if ((statb.st_mode & 01) == 0)
-				goto loop;
-		}
-#endif
-		TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
-		INTOFF;
-		stunalloc(fullname);
-		cmdp = cmdlookup(name, 1);
-		if (cmdp->cmdtype == CMDFUNCTION)
-			cmdp = &loc_cmd;
-		cmdp->cmdtype = CMDNORMAL;
-		cmdp->param.index = idx;
-		cmdp->special = 0;
-		INTON;
-		goto success;
-	}
-
-	if (act & DO_ERR) {
-		if (e == ENOENT || e == ENOTDIR)
-			outfmt(out2, "%s: not found\n", name);
-		else
-			outfmt(out2, "%s: %s\n", name, strerror(e));
-	}
-	entry->cmdtype = CMDUNKNOWN;
-	entry->u.index = 0;
-	entry->special = 0;
-	return;
-
-success:
-	if (cd)
-		cmdtable_cd = 1;
-	entry->cmdtype = cmdp->cmdtype;
-	entry->u = cmdp->param;
-	entry->special = cmdp->special;
-}
-
-
-
-/*
- * Search the table of builtin commands.
- */
-
-int
-find_builtin(const char *name, int *special)
-{
-	const unsigned char *bp;
-	size_t len;
-
-	len = strlen(name);
-	for (bp = builtincmd ; *bp ; bp += 2 + bp[0]) {
-		if (bp[0] == len && memcmp(bp + 2, name, len) == 0) {
-			*special = (bp[1] & BUILTIN_SPECIAL) != 0;
-			return bp[1] & ~BUILTIN_SPECIAL;
-		}
-	}
-	return -1;
-}
-
-
-
-/*
- * Called when a cd is done.  If any entry in cmdtable depends on the current
- * directory, simply clear cmdtable completely.
- */
-
-void
-hashcd(void)
-{
-	if (cmdtable_cd)
-		clearcmdentry();
-}
-
-
-
-/*
- * Called before PATH is changed.  The argument is the new value of PATH;
- * pathval() still returns the old value at this point.  Called with
- * interrupts off.
- */
-
-void
-changepath(const char *newval __unused)
-{
-	clearcmdentry();
-}
-
-
-/*
- * Clear out cached utility locations.
- */
-
-void
-clearcmdentry(void)
-{
-	struct tblentry **tblp;
-	struct tblentry **pp;
-	struct tblentry *cmdp;
-
-	INTOFF;
-	for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
-		pp = tblp;
-		while ((cmdp = *pp) != NULL) {
-			if (cmdp->cmdtype == CMDNORMAL) {
-				*pp = cmdp->next;
-				ckfree(cmdp);
-			} else {
-				pp = &cmdp->next;
-			}
-		}
-	}
-	cmdtable_cd = 0;
-	INTON;
-}
-
-
-/*
- * Locate a command in the command hash table.  If "add" is nonzero,
- * add the command to the table if it is not already present.  The
- * variable "lastcmdentry" is set to point to the address of the link
- * pointing to the entry, so that delete_cmd_entry can delete the
- * entry.
- */
-
-static struct tblentry **lastcmdentry;
-
-
-static struct tblentry *
-cmdlookup(const char *name, int add)
-{
-	unsigned int hashval;
-	const char *p;
-	struct tblentry *cmdp;
-	struct tblentry **pp;
-	size_t len;
-
-	p = name;
-	hashval = (unsigned char)*p << 4;
-	while (*p)
-		hashval += *p++;
-	pp = &cmdtable[hashval % CMDTABLESIZE];
-	for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
-		if (equal(cmdp->cmdname, name))
-			break;
-		pp = &cmdp->next;
-	}
-	if (add && cmdp == NULL) {
-		INTOFF;
-		len = strlen(name);
-		cmdp = *pp = ckmalloc(sizeof (struct tblentry) + len + 1);
-		cmdp->next = NULL;
-		cmdp->cmdtype = CMDUNKNOWN;
-		memcpy(cmdp->cmdname, name, len + 1);
-		INTON;
-	}
-	lastcmdentry = pp;
-	return cmdp;
-}
-
-/*
- * Delete the command entry returned on the last lookup.
- */
-
-static void
-delete_cmd_entry(void)
-{
-	struct tblentry *cmdp;
-
-	INTOFF;
-	cmdp = *lastcmdentry;
-	*lastcmdentry = cmdp->next;
-	ckfree(cmdp);
-	INTON;
-}
-
-
-
-/*
- * Add a new command entry, replacing any existing command entry for
- * the same name.
- */
-
-static void
-addcmdentry(const char *name, struct cmdentry *entry)
-{
-	struct tblentry *cmdp;
-
-	INTOFF;
-	cmdp = cmdlookup(name, 1);
-	if (cmdp->cmdtype == CMDFUNCTION) {
-		unreffunc(cmdp->param.func);
-	}
-	cmdp->cmdtype = entry->cmdtype;
-	cmdp->param = entry->u;
-	cmdp->special = entry->special;
-	INTON;
-}
-
-
-/*
- * Define a shell function.
- */
-
-void
-defun(const char *name, union node *func)
-{
-	struct cmdentry entry;
-
-	INTOFF;
-	entry.cmdtype = CMDFUNCTION;
-	entry.u.func = copyfunc(func);
-	entry.special = 0;
-	addcmdentry(name, &entry);
-	INTON;
-}
-
-
-/*
- * Delete a function if it exists.
- * Called with interrupts off.
- */
-
-int
-unsetfunc(const char *name)
-{
-	struct tblentry *cmdp;
-
-	if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) {
-		unreffunc(cmdp->param.func);
-		delete_cmd_entry();
-		return (0);
-	}
-	return (0);
-}
-
-
-/*
- * Check if a function by a certain name exists.
- */
-int
-isfunc(const char *name)
-{
-	struct tblentry *cmdp;
-	cmdp = cmdlookup(name, 0);
-	return (cmdp != NULL && cmdp->cmdtype == CMDFUNCTION);
-}
-
-
-/*
- * Shared code for the following builtin commands:
- *    type, command -v, command -V
- */
-
-int
-typecmd_impl(int argc, char **argv, int cmd, const char *path)
-{
-	struct cmdentry entry;
-	struct tblentry *cmdp;
-	const char *const *pp;
-	struct alias *ap;
-	int i;
-	int error1 = 0;
-
-	if (path != pathval())
-		clearcmdentry();
-
-	for (i = 1; i < argc; i++) {
-		/* First look at the keywords */
-		for (pp = parsekwd; *pp; pp++)
-			if (**pp == *argv[i] && equal(*pp, argv[i]))
-				break;
-
-		if (*pp) {
-			if (cmd == TYPECMD_SMALLV)
-				out1fmt("%s\n", argv[i]);
-			else
-				out1fmt("%s is a shell keyword\n", argv[i]);
-			continue;
-		}
-
-		/* Then look at the aliases */
-		if ((ap = lookupalias(argv[i], 1)) != NULL) {
-			if (cmd == TYPECMD_SMALLV) {
-				out1fmt("alias %s=", argv[i]);
-				out1qstr(ap->val);
-				outcslow('\n', out1);
-			} else
-				out1fmt("%s is an alias for %s\n", argv[i],
-				    ap->val);
-			continue;
-		}
-
-		/* Then check if it is a tracked alias */
-		if ((cmdp = cmdlookup(argv[i], 0)) != NULL) {
-			entry.cmdtype = cmdp->cmdtype;
-			entry.u = cmdp->param;
-			entry.special = cmdp->special;
-		}
-		else {
-			/* Finally use brute force */
-			find_command(argv[i], &entry, 0, path);
-		}
-
-		switch (entry.cmdtype) {
-		case CMDNORMAL: {
-			if (strchr(argv[i], '/') == NULL) {
-				const char *path2 = path;
-				const char *opt2;
-				char *name;
-				int j = entry.u.index;
-				do {
-					name = padvance(&path2, &opt2, argv[i]);
-					stunalloc(name);
-				} while (--j >= 0);
-				if (cmd == TYPECMD_SMALLV)
-					out1fmt("%s\n", name);
-				else
-					out1fmt("%s is%s %s\n", argv[i],
-					    (cmdp && cmd == TYPECMD_TYPE) ?
-						" a tracked alias for" : "",
-					    name);
-			} else {
-				if (faccessat(AT_FDCWD, argv[i], X_OK, AT_EACCESS) == 0) {
-					if (cmd == TYPECMD_SMALLV)
-						out1fmt("%s\n", argv[i]);
-					else
-						out1fmt("%s is %s\n", argv[i],
-						    argv[i]);
-				} else {
-					if (cmd != TYPECMD_SMALLV)
-						outfmt(out2, "%s: %s\n",
-						    argv[i], strerror(errno));
-					error1 |= 127;
-				}
-			}
-			break;
-		}
-		case CMDFUNCTION:
-			if (cmd == TYPECMD_SMALLV)
-				out1fmt("%s\n", argv[i]);
-			else
-				out1fmt("%s is a shell function\n", argv[i]);
-			break;
-
-		case CMDBUILTIN:
-			if (cmd == TYPECMD_SMALLV)
-				out1fmt("%s\n", argv[i]);
-			else if (entry.special)
-				out1fmt("%s is a special shell builtin\n",
-				    argv[i]);
-			else
-				out1fmt("%s is a shell builtin\n", argv[i]);
-			break;
-
-		default:
-			if (cmd != TYPECMD_SMALLV)
-				outfmt(out2, "%s: not found\n", argv[i]);
-			error1 |= 127;
-			break;
-		}
-	}
-
-	if (path != pathval())
-		clearcmdentry();
-
-	return error1;
-}
-
-/*
- * Locate and print what a word is...
- */
-
-int
-typecmd(int argc, char **argv)
-{
-	if (argc > 2 && strcmp(argv[1], "--") == 0)
-		argc--, argv++;
-	return typecmd_impl(argc, argv, TYPECMD_TYPE, bltinlookup("PATH", 1));
-}
diff --git a/bin/1sh/exec.h b/bin/1sh/exec.h
deleted file mode 100644
index 3b3a5b77..00000000
--- a/bin/1sh/exec.h
+++ /dev/null
@@ -1,76 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)exec.h	8.3 (Berkeley) 6/8/95
- * $FreeBSD: releng/12.0/bin/sh/exec.h 336320 2018-07-15 21:55:17Z jilles $
- */
-
-/* values of cmdtype */
-#define CMDUNKNOWN -1		/* no entry in table for command */
-#define CMDNORMAL 0		/* command is an executable program */
-#define CMDBUILTIN 1		/* command is a shell builtin */
-#define CMDFUNCTION 2		/* command is a shell function */
-
-/* values for typecmd_impl's third parameter */
-enum {
-	TYPECMD_SMALLV,		/* command -v */
-	TYPECMD_BIGV,		/* command -V */
-	TYPECMD_TYPE		/* type */
-};
-
-union node;
-struct cmdentry {
-	int cmdtype;
-	union param {
-		int index;
-		struct funcdef *func;
-	} u;
-	int special;
-};
-
-
-/* action to find_command() */
-#define DO_ERR		0x01	/* prints errors */
-#define DO_NOFUNC	0x02	/* don't return shell functions, for command */
-
-extern int exerrno;		/* last exec error */
-
-void shellexec(char **, char **, const char *, int) __dead2;
-char *padvance(const char **, const char **, const char *);
-void find_command(const char *, struct cmdentry *, int, const char *);
-int find_builtin(const char *, int *);
-void hashcd(void);
-void changepath(const char *);
-void defun(const char *, union node *);
-int unsetfunc(const char *);
-int isfunc(const char *);
-int typecmd_impl(int, char **, int, const char *);
-void clearcmdentry(void);
diff --git a/bin/1sh/expand.c b/bin/1sh/expand.c
deleted file mode 100644
index 7c419b80..00000000
--- a/bin/1sh/expand.c
+++ /dev/null
@@ -1,1552 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- * Copyright (c) 1997-2005
- *	Herbert Xu <herbert@gondor.apana.org.au>.  All rights reserved.
- * Copyright (c) 2010-2015
- *	Jilles Tjoelker <jilles@stack.nl>.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)expand.c	8.5 (Berkeley) 5/15/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/expand.c 338473 2018-09-05 19:16:09Z jilles $");
-
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wchar.h>
-#include <wctype.h>
-
-/*
- * Routines to expand arguments to commands.  We have to deal with
- * backquotes, shell variables, and file metacharacters.
- */
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"
-#include "eval.h"
-#include "expand.h"
-#include "syntax.h"
-#include "parser.h"
-#include "jobs.h"
-#include "options.h"
-#include "var.h"
-#include "input.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "arith.h"
-#include "show.h"
-#include "builtins.h"
-
-enum wordstate { WORD_IDLE, WORD_WS_DELIMITED, WORD_QUOTEMARK };
-
-struct worddest {
-	struct arglist *list;
-	enum wordstate state;
-};
-
-static char *expdest;			/* output of current string */
-
-static const char *argstr(const char *, struct nodelist **restrict, int,
-    struct worddest *);
-static const char *exptilde(const char *, int);
-static const char *expari(const char *, struct nodelist **restrict, int,
-    struct worddest *);
-static void expbackq(union node *, int, int, struct worddest *);
-static const char *subevalvar_trim(const char *, struct nodelist **restrict,
-    int, int, int);
-static const char *subevalvar_misc(const char *, struct nodelist **restrict,
-    const char *, int, int, int);
-static const char *evalvar(const char *, struct nodelist **restrict, int,
-    struct worddest *);
-static int varisset(const char *, int);
-static void strtodest(const char *, int, int, int, struct worddest *);
-static void reprocess(int, int, int, int, struct worddest *);
-static void varvalue(const char *, int, int, int, struct worddest *);
-static void expandmeta(char *, struct arglist *);
-static void expmeta(char *, char *, struct arglist *);
-static int expsortcmp(const void *, const void *);
-static int patmatch(const char *, const char *);
-static void cvtnum(int, char *);
-static int collate_range_cmp(wchar_t, wchar_t);
-
-void
-emptyarglist(struct arglist *list)
-{
-
-	list->args = list->smallarg;
-	list->count = 0;
-	list->capacity = sizeof(list->smallarg) / sizeof(list->smallarg[0]);
-}
-
-void
-appendarglist(struct arglist *list, char *str)
-{
-	char **newargs;
-	int newcapacity;
-
-	if (list->count >= list->capacity) {
-		newcapacity = list->capacity * 2;
-		if (newcapacity < 16)
-			newcapacity = 16;
-		if (newcapacity > INT_MAX / (int)sizeof(newargs[0]))
-			error("Too many entries in arglist");
-		newargs = stalloc(newcapacity * sizeof(newargs[0]));
-		memcpy(newargs, list->args, list->count * sizeof(newargs[0]));
-		list->args = newargs;
-		list->capacity = newcapacity;
-	}
-	list->args[list->count++] = str;
-}
-
-static int
-collate_range_cmp(wchar_t c1, wchar_t c2)
-{
-	wchar_t s1[2], s2[2];
-
-	s1[0] = c1;
-	s1[1] = L'\0';
-	s2[0] = c2;
-	s2[1] = L'\0';
-	return (wcscoll(s1, s2));
-}
-
-static char *
-stputs_quotes(const char *data, const char *syntax, char *p)
-{
-	while (*data) {
-		CHECKSTRSPACE(2, p);
-		if (syntax[(int)*data] == CCTL)
-			USTPUTC(CTLESC, p);
-		USTPUTC(*data++, p);
-	}
-	return (p);
-}
-#define STPUTS_QUOTES(data, syntax, p) p = stputs_quotes((data), syntax, p)
-
-static char *
-nextword(char c, int flag, char *p, struct worddest *dst)
-{
-	int is_ws;
-
-	is_ws = c == '\t' || c == '\n' || c == ' ';
-	if (p != stackblock() || (is_ws ? dst->state == WORD_QUOTEMARK :
-	    dst->state != WORD_WS_DELIMITED) || c == '\0') {
-		STPUTC('\0', p);
-		if (flag & EXP_GLOB)
-			expandmeta(grabstackstr(p), dst->list);
-		else
-			appendarglist(dst->list, grabstackstr(p));
-		dst->state = is_ws ? WORD_WS_DELIMITED : WORD_IDLE;
-	} else if (!is_ws && dst->state == WORD_WS_DELIMITED)
-		dst->state = WORD_IDLE;
-	/* Reserve space while the stack string is empty. */
-	appendarglist(dst->list, NULL);
-	dst->list->count--;
-	STARTSTACKSTR(p);
-	return p;
-}
-#define NEXTWORD(c, flag, p, dstlist) p = nextword(c, flag, p, dstlist)
-
-static char *
-stputs_split(const char *data, const char *syntax, int flag, char *p,
-    struct worddest *dst)
-{
-	const char *ifs;
-	char c;
-
-	ifs = ifsset() ? ifsval() : " \t\n";
-	while (*data) {
-		CHECKSTRSPACE(2, p);
-		c = *data++;
-		if (strchr(ifs, c) != NULL) {
-			NEXTWORD(c, flag, p, dst);
-			continue;
-		}
-		if (flag & EXP_GLOB && syntax[(int)c] == CCTL)
-			USTPUTC(CTLESC, p);
-		USTPUTC(c, p);
-	}
-	return (p);
-}
-#define STPUTS_SPLIT(data, syntax, flag, p, dst) p = stputs_split((data), syntax, flag, p, dst)
-
-/*
- * Perform expansions on an argument, placing the resulting list of arguments
- * in arglist.  Parameter expansion, command substitution and arithmetic
- * expansion are always performed; additional expansions can be requested
- * via flag (EXP_*).
- * The result is left in the stack string.
- * When arglist is NULL, perform here document expansion.
- *
- * When doing something that may cause this to be re-entered, make sure
- * the stack string is empty via grabstackstr() and do not assume expdest
- * remains valid.
- */
-void
-expandarg(union node *arg, struct arglist *arglist, int flag)
-{
-	struct worddest exparg;
-	struct nodelist *argbackq;
-
-	if (fflag)
-		flag &= ~EXP_GLOB;
-	argbackq = arg->narg.backquote;
-	exparg.list = arglist;
-	exparg.state = WORD_IDLE;
-	STARTSTACKSTR(expdest);
-	argstr(arg->narg.text, &argbackq, flag, &exparg);
-	if (arglist == NULL) {
-		STACKSTRNUL(expdest);
-		return;			/* here document expanded */
-	}
-	if ((flag & EXP_SPLIT) == 0 || expdest != stackblock() ||
-	    exparg.state == WORD_QUOTEMARK) {
-		STPUTC('\0', expdest);
-		if (flag & EXP_SPLIT) {
-			if (flag & EXP_GLOB)
-				expandmeta(grabstackstr(expdest), exparg.list);
-			else
-				appendarglist(exparg.list, grabstackstr(expdest));
-		}
-	}
-	if ((flag & EXP_SPLIT) == 0)
-		appendarglist(arglist, grabstackstr(expdest));
-}
-
-
-
-/*
- * Perform parameter expansion, command substitution and arithmetic
- * expansion, and tilde expansion if requested via EXP_TILDE/EXP_VARTILDE.
- * Processing ends at a CTLENDVAR or CTLENDARI character as well as '\0'.
- * This is used to expand word in ${var+word} etc.
- * If EXP_GLOB or EXP_CASE are set, keep and/or generate CTLESC
- * characters to allow for further processing.
- *
- * If EXP_SPLIT is set, dst receives any complete words produced.
- */
-static const char *
-argstr(const char *p, struct nodelist **restrict argbackq, int flag,
-    struct worddest *dst)
-{
-	char c;
-	int quotes = flag & (EXP_GLOB | EXP_CASE);	/* do CTLESC */
-	int firsteq = 1;
-	int split_lit;
-	int lit_quoted;
-
-	split_lit = flag & EXP_SPLIT_LIT;
-	lit_quoted = flag & EXP_LIT_QUOTED;
-	flag &= ~(EXP_SPLIT_LIT | EXP_LIT_QUOTED);
-	if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE)))
-		p = exptilde(p, flag);
-	for (;;) {
-		CHECKSTRSPACE(2, expdest);
-		switch (c = *p++) {
-		case '\0':
-			return (p - 1);
-		case CTLENDVAR:
-		case CTLENDARI:
-			return (p);
-		case CTLQUOTEMARK:
-			lit_quoted = 1;
-			/* "$@" syntax adherence hack */
-			if (p[0] == CTLVAR && (p[1] & VSQUOTE) != 0 &&
-			    p[2] == '@' && p[3] == '=')
-				break;
-			if ((flag & EXP_SPLIT) != 0 && expdest == stackblock())
-				dst->state = WORD_QUOTEMARK;
-			break;
-		case CTLQUOTEEND:
-			lit_quoted = 0;
-			break;
-		case CTLESC:
-			c = *p++;
-			if (split_lit && !lit_quoted &&
-			    strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
-				NEXTWORD(c, flag, expdest, dst);
-				break;
-			}
-			if (quotes)
-				USTPUTC(CTLESC, expdest);
-			USTPUTC(c, expdest);
-			break;
-		case CTLVAR:
-			p = evalvar(p, argbackq, flag, dst);
-			break;
-		case CTLBACKQ:
-		case CTLBACKQ|CTLQUOTE:
-			expbackq((*argbackq)->n, c & CTLQUOTE, flag, dst);
-			*argbackq = (*argbackq)->next;
-			break;
-		case CTLARI:
-			p = expari(p, argbackq, flag, dst);
-			break;
-		case ':':
-		case '=':
-			/*
-			 * sort of a hack - expand tildes in variable
-			 * assignments (after the first '=' and after ':'s).
-			 */
-			if (split_lit && !lit_quoted &&
-			    strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
-				NEXTWORD(c, flag, expdest, dst);
-				break;
-			}
-			USTPUTC(c, expdest);
-			if (flag & EXP_VARTILDE && *p == '~' &&
-			    (c != '=' || firsteq)) {
-				if (c == '=')
-					firsteq = 0;
-				p = exptilde(p, flag);
-			}
-			break;
-		default:
-			if (split_lit && !lit_quoted &&
-			    strchr(ifsset() ? ifsval() : " \t\n", c) != NULL) {
-				NEXTWORD(c, flag, expdest, dst);
-				break;
-			}
-			USTPUTC(c, expdest);
-		}
-	}
-}
-
-/*
- * Perform tilde expansion, placing the result in the stack string and
- * returning the next position in the input string to process.
- */
-static const char *
-exptilde(const char *p, int flag)
-{
-	char c;
-	const char *startp = p;
-	const char *user;
-	struct passwd *pw;
-	char *home;
-	int len;
-
-	for (;;) {
-		c = *p;
-		switch(c) {
-		case CTLESC: /* This means CTL* are always considered quoted. */
-		case CTLVAR:
-		case CTLBACKQ:
-		case CTLBACKQ | CTLQUOTE:
-		case CTLARI:
-		case CTLENDARI:
-		case CTLQUOTEMARK:
-			return (startp);
-		case ':':
-			if ((flag & EXP_VARTILDE) == 0)
-				break;
-			/* FALLTHROUGH */
-		case '\0':
-		case '/':
-		case CTLENDVAR:
-			len = p - startp - 1;
-			STPUTBIN(startp + 1, len, expdest);
-			STACKSTRNUL(expdest);
-			user = expdest - len;
-			if (*user == '\0') {
-				home = lookupvar("HOME");
-			} else {
-				pw = getpwnam(user);
-				home = pw != NULL ? pw->pw_dir : NULL;
-			}
-			STADJUST(-len, expdest);
-			if (home == NULL || *home == '\0')
-				return (startp);
-			strtodest(home, flag, VSNORMAL, 1, NULL);
-			return (p);
-		}
-		p++;
-	}
-}
-
-
-/*
- * Expand arithmetic expression.
- */
-static const char *
-expari(const char *p, struct nodelist **restrict argbackq, int flag,
-    struct worddest *dst)
-{
-	char *q, *start;
-	arith_t result;
-	int begoff;
-	int quoted;
-	int adj;
-
-	quoted = *p++ == '"';
-	begoff = expdest - stackblock();
-	p = argstr(p, argbackq, 0, NULL);
-	STPUTC('\0', expdest);
-	start = stackblock() + begoff;
-
-	q = grabstackstr(expdest);
-	result = arith(start);
-	ungrabstackstr(q, expdest);
-
-	start = stackblock() + begoff;
-	adj = start - expdest;
-	STADJUST(adj, expdest);
-
-	CHECKSTRSPACE((int)(DIGITS(result) + 1), expdest);
-	fmtstr(expdest, DIGITS(result), ARITH_FORMAT_STR, result);
-	adj = strlen(expdest);
-	STADJUST(adj, expdest);
-	/*
-	 * If this is quoted, a '-' must not indicate a range in [...].
-	 * If this is not quoted, splitting may occur.
-	 */
-	if (quoted ?
-	    result < 0 && begoff > 1 && flag & (EXP_GLOB | EXP_CASE) :
-	    flag & EXP_SPLIT)
-		reprocess(expdest - adj - stackblock(), flag, VSNORMAL, quoted,
-		    dst);
-	return p;
-}
-
-
-/*
- * Perform command substitution.
- */
-static void
-expbackq(union node *cmd, int quoted, int flag, struct worddest *dst)
-{
-	struct backcmd in;
-	int i;
-	char buf[128];
-	char *p;
-	char *dest = expdest;
-	char lastc;
-	char const *syntax = quoted? DQSYNTAX : BASESYNTAX;
-	int quotes = flag & (EXP_GLOB | EXP_CASE);
-	size_t nnl;
-	const char *ifs;
-	int startloc;
-
-	INTOFF;
-	p = grabstackstr(dest);
-	evalbackcmd(cmd, &in);
-	ungrabstackstr(p, dest);
-
-	p = in.buf;
-	startloc = dest - stackblock();
-	nnl = 0;
-	if (!quoted && flag & EXP_SPLIT)
-		ifs = ifsset() ? ifsval() : " \t\n";
-	else
-		ifs = "";
-	/* Remove trailing newlines */
-	for (;;) {
-		if (--in.nleft < 0) {
-			if (in.fd < 0)
-				break;
-			while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR)
-				;
-			TRACE(("expbackq: read returns %d\n", i));
-			if (i <= 0)
-				break;
-			p = buf;
-			in.nleft = i - 1;
-		}
-		lastc = *p++;
-		if (lastc == '\0')
-			continue;
-		if (nnl > 0 && lastc != '\n') {
-			NEXTWORD('\n', flag, dest, dst);
-			nnl = 0;
-		}
-		if (strchr(ifs, lastc) != NULL) {
-			if (lastc == '\n')
-				nnl++;
-			else
-				NEXTWORD(lastc, flag, dest, dst);
-		} else {
-			CHECKSTRSPACE(2, dest);
-			if (quotes && syntax[(int)lastc] == CCTL)
-				USTPUTC(CTLESC, dest);
-			USTPUTC(lastc, dest);
-		}
-	}
-	while (dest > stackblock() + startloc && STTOPC(dest) == '\n')
-		STUNPUTC(dest);
-
-	if (in.fd >= 0)
-		close(in.fd);
-	if (in.buf)
-		ckfree(in.buf);
-	if (in.jp) {
-		p = grabstackstr(dest);
-		exitstatus = waitforjob(in.jp, (int *)NULL);
-		ungrabstackstr(p, dest);
-	}
-	TRACE(("expbackq: done\n"));
-	expdest = dest;
-	INTON;
-}
-
-
-
-static void
-recordleft(const char *str, const char *loc, char *startp)
-{
-	int amount;
-
-	amount = ((str - 1) - (loc - startp)) - expdest;
-	STADJUST(amount, expdest);
-	while (loc != str - 1)
-		*startp++ = *loc++;
-}
-
-static const char *
-subevalvar_trim(const char *p, struct nodelist **restrict argbackq, int strloc,
-    int subtype, int startloc)
-{
-	char *startp;
-	char *loc = NULL;
-	char *str;
-	int c = 0;
-	int amount;
-
-	p = argstr(p, argbackq, EXP_CASE | EXP_TILDE, NULL);
-	STACKSTRNUL(expdest);
-	startp = stackblock() + startloc;
-	str = stackblock() + strloc;
-
-	switch (subtype) {
-	case VSTRIMLEFT:
-		for (loc = startp; loc < str; loc++) {
-			c = *loc;
-			*loc = '\0';
-			if (patmatch(str, startp)) {
-				*loc = c;
-				recordleft(str, loc, startp);
-				return p;
-			}
-			*loc = c;
-		}
-		break;
-
-	case VSTRIMLEFTMAX:
-		for (loc = str - 1; loc >= startp;) {
-			c = *loc;
-			*loc = '\0';
-			if (patmatch(str, startp)) {
-				*loc = c;
-				recordleft(str, loc, startp);
-				return p;
-			}
-			*loc = c;
-			loc--;
-		}
-		break;
-
-	case VSTRIMRIGHT:
-		for (loc = str - 1; loc >= startp;) {
-			if (patmatch(str, loc)) {
-				amount = loc - expdest;
-				STADJUST(amount, expdest);
-				return p;
-			}
-			loc--;
-		}
-		break;
-
-	case VSTRIMRIGHTMAX:
-		for (loc = startp; loc < str - 1; loc++) {
-			if (patmatch(str, loc)) {
-				amount = loc - expdest;
-				STADJUST(amount, expdest);
-				return p;
-			}
-		}
-		break;
-
-
-	default:
-		abort();
-	}
-	amount = (expdest - stackblock() - strloc) + 1;
-	STADJUST(-amount, expdest);
-	return p;
-}
-
-
-static const char *
-subevalvar_misc(const char *p, struct nodelist **restrict argbackq,
-    const char *var, int subtype, int startloc, int varflags)
-{
-	char *startp;
-	int amount;
-
-	p = argstr(p, argbackq, EXP_TILDE, NULL);
-	STACKSTRNUL(expdest);
-	startp = stackblock() + startloc;
-
-	switch (subtype) {
-	case VSASSIGN:
-		setvar(var, startp, 0);
-		amount = startp - expdest;
-		STADJUST(amount, expdest);
-		return p;
-
-	case VSQUESTION:
-		if (*p != CTLENDVAR) {
-			outfmt(out2, "%s\n", startp);
-			error((char *)NULL);
-		}
-		error("%.*s: parameter %snot set", (int)(p - var - 1),
-		      var, (varflags & VSNUL) ? "null or " : "");
-
-	default:
-		abort();
-	}
-}
-
-
-/*
- * Expand a variable, and return a pointer to the next character in the
- * input string.
- */
-
-static const char *
-evalvar(const char *p, struct nodelist **restrict argbackq, int flag,
-    struct worddest *dst)
-{
-	int subtype;
-	int varflags;
-	const char *var;
-	const char *val;
-	int patloc;
-	int c;
-	int set;
-	int special;
-	int startloc;
-	int varlen;
-	int varlenb;
-	char buf[21];
-
-	varflags = (unsigned char)*p++;
-	subtype = varflags & VSTYPE;
-	var = p;
-	special = 0;
-	if (! is_name(*p))
-		special = 1;
-	p = strchr(p, '=') + 1;
-	if (varflags & VSLINENO) {
-		set = 1;
-		special = 1;
-		val = NULL;
-	} else if (special) {
-		set = varisset(var, varflags & VSNUL);
-		val = NULL;
-	} else {
-		val = bltinlookup(var, 1);
-		if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
-			val = NULL;
-			set = 0;
-		} else
-			set = 1;
-	}
-	varlen = 0;
-	startloc = expdest - stackblock();
-	if (!set && uflag && *var != '@' && *var != '*') {
-		switch (subtype) {
-		case VSNORMAL:
-		case VSTRIMLEFT:
-		case VSTRIMLEFTMAX:
-		case VSTRIMRIGHT:
-		case VSTRIMRIGHTMAX:
-		case VSLENGTH:
-			error("%.*s: parameter not set", (int)(p - var - 1),
-			    var);
-		}
-	}
-	if (set && subtype != VSPLUS) {
-		/* insert the value of the variable */
-		if (special) {
-			if (varflags & VSLINENO) {
-				if (p - var > (ptrdiff_t)sizeof(buf))
-					abort();
-				memcpy(buf, var, p - var - 1);
-				buf[p - var - 1] = '\0';
-				strtodest(buf, flag, subtype,
-				    varflags & VSQUOTE, dst);
-			} else
-				varvalue(var, varflags & VSQUOTE, subtype, flag,
-				    dst);
-			if (subtype == VSLENGTH) {
-				varlenb = expdest - stackblock() - startloc;
-				varlen = varlenb;
-				if (localeisutf8) {
-					val = stackblock() + startloc;
-					for (;val != expdest; val++)
-						if ((*val & 0xC0) == 0x80)
-							varlen--;
-				}
-				STADJUST(-varlenb, expdest);
-			}
-		} else {
-			if (subtype == VSLENGTH) {
-				for (;*val; val++)
-					if (!localeisutf8 ||
-					    (*val & 0xC0) != 0x80)
-						varlen++;
-			}
-			else
-				strtodest(val, flag, subtype,
-				    varflags & VSQUOTE, dst);
-		}
-	}
-
-	if (subtype == VSPLUS)
-		set = ! set;
-
-	switch (subtype) {
-	case VSLENGTH:
-		cvtnum(varlen, buf);
-		strtodest(buf, flag, VSNORMAL, varflags & VSQUOTE, dst);
-		break;
-
-	case VSNORMAL:
-		return p;
-
-	case VSPLUS:
-	case VSMINUS:
-		if (!set) {
-			return argstr(p, argbackq,
-			    flag | (flag & EXP_SPLIT ? EXP_SPLIT_LIT : 0) |
-			    (varflags & VSQUOTE ? EXP_LIT_QUOTED : 0), dst);
-		}
-		break;
-
-	case VSTRIMLEFT:
-	case VSTRIMLEFTMAX:
-	case VSTRIMRIGHT:
-	case VSTRIMRIGHTMAX:
-		if (!set)
-			break;
-		/*
-		 * Terminate the string and start recording the pattern
-		 * right after it
-		 */
-		STPUTC('\0', expdest);
-		patloc = expdest - stackblock();
-		p = subevalvar_trim(p, argbackq, patloc, subtype, startloc);
-		reprocess(startloc, flag, VSNORMAL, varflags & VSQUOTE, dst);
-		if (flag & EXP_SPLIT && *var == '@' && varflags & VSQUOTE)
-			dst->state = WORD_QUOTEMARK;
-		return p;
-
-	case VSASSIGN:
-	case VSQUESTION:
-		if (!set) {
-			p = subevalvar_misc(p, argbackq, var, subtype,
-			    startloc, varflags);
-			/* assert(subtype == VSASSIGN); */
-			val = lookupvar(var);
-			strtodest(val, flag, subtype, varflags & VSQUOTE, dst);
-			return p;
-		}
-		break;
-
-	case VSERROR:
-		c = p - var - 1;
-		error("${%.*s%s}: Bad substitution", c, var,
-		    (c > 0 && *p != CTLENDVAR) ? "..." : "");
-
-	default:
-		abort();
-	}
-
-	{	/* skip to end of alternative */
-		int nesting = 1;
-		for (;;) {
-			if ((c = *p++) == CTLESC)
-				p++;
-			else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE))
-				*argbackq = (*argbackq)->next;
-			else if (c == CTLVAR) {
-				if ((*p++ & VSTYPE) != VSNORMAL)
-					nesting++;
-			} else if (c == CTLENDVAR) {
-				if (--nesting == 0)
-					break;
-			}
-		}
-	}
-	return p;
-}
-
-
-
-/*
- * Test whether a special or positional parameter is set.
- */
-
-static int
-varisset(const char *name, int nulok)
-{
-
-	if (*name == '!')
-		return backgndpidset();
-	else if (*name == '@' || *name == '*') {
-		if (*shellparam.p == NULL)
-			return 0;
-
-		if (nulok) {
-			char **av;
-
-			for (av = shellparam.p; *av; av++)
-				if (**av != '\0')
-					return 1;
-			return 0;
-		}
-	} else if (is_digit(*name)) {
-		char *ap;
-		long num;
-
-		errno = 0;
-		num = strtol(name, NULL, 10);
-		if (errno != 0 || num > shellparam.nparam)
-			return 0;
-
-		if (num == 0)
-			ap = arg0;
-		else
-			ap = shellparam.p[num - 1];
-
-		if (nulok && (ap == NULL || *ap == '\0'))
-			return 0;
-	}
-	return 1;
-}
-
-static void
-strtodest(const char *p, int flag, int subtype, int quoted,
-    struct worddest *dst)
-{
-	if (subtype == VSLENGTH || subtype == VSTRIMLEFT ||
-	    subtype == VSTRIMLEFTMAX || subtype == VSTRIMRIGHT ||
-	    subtype == VSTRIMRIGHTMAX)
-		STPUTS(p, expdest);
-	else if (flag & EXP_SPLIT && !quoted && dst != NULL)
-		STPUTS_SPLIT(p, BASESYNTAX, flag, expdest, dst);
-	else if (flag & (EXP_GLOB | EXP_CASE))
-		STPUTS_QUOTES(p, quoted ? DQSYNTAX : BASESYNTAX, expdest);
-	else
-		STPUTS(p, expdest);
-}
-
-static void
-reprocess(int startloc, int flag, int subtype, int quoted,
-    struct worddest *dst)
-{
-	static char *buf = NULL;
-	static size_t buflen = 0;
-	char *startp;
-	size_t len, zpos, zlen;
-
-	startp = stackblock() + startloc;
-	len = expdest - startp;
-	if (len >= SIZE_MAX / 2 || len > PTRDIFF_MAX)
-		abort();
-	INTOFF;
-	if (len >= buflen) {
-		ckfree(buf);
-		buf = NULL;
-	}
-	if (buflen < 128)
-		buflen = 128;
-	while (len >= buflen)
-		buflen <<= 1;
-	if (buf == NULL)
-		buf = ckmalloc(buflen);
-	INTON;
-	memcpy(buf, startp, len);
-	buf[len] = '\0';
-	STADJUST(-(ptrdiff_t)len, expdest);
-	for (zpos = 0;;) {
-		zlen = strlen(buf + zpos);
-		strtodest(buf + zpos, flag, subtype, quoted, dst);
-		zpos += zlen + 1;
-		if (zpos == len + 1)
-			break;
-		if (flag & EXP_SPLIT && (quoted || (zlen > 0 && zpos < len)))
-			NEXTWORD('\0', flag, expdest, dst);
-	}
-}
-
-/*
- * Add the value of a special or positional parameter to the stack string.
- */
-
-static void
-varvalue(const char *name, int quoted, int subtype, int flag,
-    struct worddest *dst)
-{
-	int num;
-	char *p;
-	int i;
-	int splitlater;
-	char sep[2];
-	char **ap;
-	char buf[(NSHORTOPTS > 10 ? NSHORTOPTS : 10) + 1];
-
-	if (subtype == VSLENGTH)
-		flag &= ~EXP_FULL;
-	splitlater = subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX ||
-		subtype == VSTRIMRIGHT || subtype == VSTRIMRIGHTMAX;
-
-	switch (*name) {
-	case '$':
-		num = rootpid;
-		break;
-	case '?':
-		num = oexitstatus;
-		break;
-	case '#':
-		num = shellparam.nparam;
-		break;
-	case '!':
-		num = backgndpidval();
-		break;
-	case '-':
-		p = buf;
-		for (i = 0 ; i < NSHORTOPTS ; i++) {
-			if (optval[i])
-				*p++ = optletter[i];
-		}
-		*p = '\0';
-		strtodest(buf, flag, subtype, quoted, dst);
-		return;
-	case '@':
-		if (flag & EXP_SPLIT && quoted) {
-			for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
-				strtodest(p, flag, subtype, quoted, dst);
-				if (*ap) {
-					if (splitlater)
-						STPUTC('\0', expdest);
-					else
-						NEXTWORD('\0', flag, expdest,
-						    dst);
-				}
-			}
-			if (shellparam.nparam > 0)
-				dst->state = WORD_QUOTEMARK;
-			return;
-		}
-		/* FALLTHROUGH */
-	case '*':
-		if (ifsset())
-			sep[0] = ifsval()[0];
-		else
-			sep[0] = ' ';
-		sep[1] = '\0';
-		for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
-			strtodest(p, flag, subtype, quoted, dst);
-			if (!*ap)
-				break;
-			if (sep[0])
-				strtodest(sep, flag, subtype, quoted, dst);
-			else if (flag & EXP_SPLIT && !quoted && **ap != '\0') {
-				if (splitlater)
-					STPUTC('\0', expdest);
-				else
-					NEXTWORD('\0', flag, expdest, dst);
-			}
-		}
-		return;
-	default:
-		if (is_digit(*name)) {
-			num = atoi(name);
-			if (num == 0)
-				p = arg0;
-			else if (num > 0 && num <= shellparam.nparam)
-				p = shellparam.p[num - 1];
-			else
-				return;
-			strtodest(p, flag, subtype, quoted, dst);
-		}
-		return;
-	}
-	cvtnum(num, buf);
-	strtodest(buf, flag, subtype, quoted, dst);
-}
-
-
-
-static char expdir[PATH_MAX];
-#define expdir_end (expdir + sizeof(expdir))
-
-/*
- * Perform pathname generation and remove control characters.
- * At this point, the only control characters should be CTLESC.
- * The results are stored in the list dstlist.
- */
-static void
-expandmeta(char *pattern, struct arglist *dstlist)
-{
-	char *p;
-	int firstmatch;
-	char c;
-
-	firstmatch = dstlist->count;
-	p = pattern;
-	for (; (c = *p) != '\0'; p++) {
-		/* fast check for meta chars */
-		if (c == '*' || c == '?' || c == '[') {
-			INTOFF;
-			expmeta(expdir, pattern, dstlist);
-			INTON;
-			break;
-		}
-	}
-	if (dstlist->count == firstmatch) {
-		/*
-		 * no matches
-		 */
-		rmescapes(pattern);
-		appendarglist(dstlist, pattern);
-	} else {
-		qsort(&dstlist->args[firstmatch],
-		    dstlist->count - firstmatch,
-		    sizeof(dstlist->args[0]), expsortcmp);
-	}
-}
-
-
-/*
- * Do metacharacter (i.e. *, ?, [...]) expansion.
- */
-
-static void
-expmeta(char *enddir, char *name, struct arglist *arglist)
-{
-	const char *p;
-	const char *q;
-	const char *start;
-	char *endname;
-	int metaflag;
-	struct stat statb;
-	DIR *dirp;
-	struct dirent *dp;
-	int atend;
-	int matchdot;
-	int esc;
-	int namlen;
-
-	metaflag = 0;
-	start = name;
-	for (p = name; esc = 0, *p; p += esc + 1) {
-		if (*p == '*' || *p == '?')
-			metaflag = 1;
-		else if (*p == '[') {
-			q = p + 1;
-			if (*q == '!' || *q == '^')
-				q++;
-			for (;;) {
-				if (*q == CTLESC)
-					q++;
-				if (*q == '/' || *q == '\0')
-					break;
-				if (*++q == ']') {
-					metaflag = 1;
-					break;
-				}
-			}
-		} else if (*p == '\0')
-			break;
-		else {
-			if (*p == CTLESC)
-				esc++;
-			if (p[esc] == '/') {
-				if (metaflag)
-					break;
-				start = p + esc + 1;
-			}
-		}
-	}
-	if (metaflag == 0) {	/* we've reached the end of the file name */
-		if (enddir != expdir)
-			metaflag++;
-		for (p = name ; ; p++) {
-			if (*p == CTLESC)
-				p++;
-			*enddir++ = *p;
-			if (*p == '\0')
-				break;
-			if (enddir == expdir_end)
-				return;
-		}
-		if (metaflag == 0 || lstat(expdir, &statb) >= 0)
-			appendarglist(arglist, stsavestr(expdir));
-		return;
-	}
-	endname = name + (p - name);
-	if (start != name) {
-		p = name;
-		while (p < start) {
-			if (*p == CTLESC)
-				p++;
-			*enddir++ = *p++;
-			if (enddir == expdir_end)
-				return;
-		}
-	}
-	if (enddir == expdir) {
-		p = ".";
-	} else if (enddir == expdir + 1 && *expdir == '/') {
-		p = "/";
-	} else {
-		p = expdir;
-		enddir[-1] = '\0';
-	}
-	if ((dirp = opendir(p)) == NULL)
-		return;
-	if (enddir != expdir)
-		enddir[-1] = '/';
-	if (*endname == 0) {
-		atend = 1;
-	} else {
-		atend = 0;
-		*endname = '\0';
-		endname += esc + 1;
-	}
-	matchdot = 0;
-	p = start;
-	if (*p == CTLESC)
-		p++;
-	if (*p == '.')
-		matchdot++;
-	while (! int_pending() && (dp = readdir(dirp)) != NULL) {
-		if (dp->d_name[0] == '.' && ! matchdot)
-			continue;
-		if (patmatch(start, dp->d_name)) {
-			namlen = dp->d_namlen;
-			if (enddir + namlen + 1 > expdir_end)
-				continue;
-			memcpy(enddir, dp->d_name, namlen + 1);
-			if (atend)
-				appendarglist(arglist, stsavestr(expdir));
-			else {
-				if (dp->d_type != DT_UNKNOWN &&
-				    dp->d_type != DT_DIR &&
-				    dp->d_type != DT_LNK)
-					continue;
-				if (enddir + namlen + 2 > expdir_end)
-					continue;
-				enddir[namlen] = '/';
-				enddir[namlen + 1] = '\0';
-				expmeta(enddir + namlen + 1, endname, arglist);
-			}
-		}
-	}
-	closedir(dirp);
-	if (! atend)
-		endname[-esc - 1] = esc ? CTLESC : '/';
-}
-
-
-static int
-expsortcmp(const void *p1, const void *p2)
-{
-	const char *s1 = *(const char * const *)p1;
-	const char *s2 = *(const char * const *)p2;
-
-	return (strcoll(s1, s2));
-}
-
-
-
-static wchar_t
-get_wc(const char **p)
-{
-	wchar_t c;
-	int chrlen;
-
-	chrlen = mbtowc(&c, *p, 4);
-	if (chrlen == 0)
-		return 0;
-	else if (chrlen == -1)
-		c = 0;
-	else
-		*p += chrlen;
-	return c;
-}
-
-
-/*
- * See if a character matches a character class, starting at the first colon
- * of "[:class:]".
- * If a valid character class is recognized, a pointer to the next character
- * after the final closing bracket is stored into *end, otherwise a null
- * pointer is stored into *end.
- */
-static int
-match_charclass(const char *p, wchar_t chr, const char **end)
-{
-	char name[20];
-	const char *nameend;
-	wctype_t cclass;
-
-	*end = NULL;
-	p++;
-	nameend = strstr(p, ":]");
-	if (nameend == NULL || (size_t)(nameend - p) >= sizeof(name) ||
-	    nameend == p)
-		return 0;
-	memcpy(name, p, nameend - p);
-	name[nameend - p] = '\0';
-	*end = nameend + 2;
-	cclass = wctype(name);
-	/* An unknown class matches nothing but is valid nevertheless. */
-	if (cclass == 0)
-		return 0;
-	return iswctype(chr, cclass);
-}
-
-
-/*
- * Returns true if the pattern matches the string.
- */
-
-static int
-patmatch(const char *pattern, const char *string)
-{
-	const char *p, *q, *end;
-	const char *bt_p, *bt_q;
-	char c;
-	wchar_t wc, wc2;
-
-	p = pattern;
-	q = string;
-	bt_p = NULL;
-	bt_q = NULL;
-	for (;;) {
-		switch (c = *p++) {
-		case '\0':
-			if (*q != '\0')
-				goto backtrack;
-			return 1;
-		case CTLESC:
-			if (*q++ != *p++)
-				goto backtrack;
-			break;
-		case '?':
-			if (*q == '\0')
-				return 0;
-			if (localeisutf8) {
-				wc = get_wc(&q);
-				/*
-				 * A '?' does not match invalid UTF-8 but a
-				 * '*' does, so backtrack.
-				 */
-				if (wc == 0)
-					goto backtrack;
-			} else
-				q++;
-			break;
-		case '*':
-			c = *p;
-			while (c == '*')
-				c = *++p;
-			/*
-			 * If the pattern ends here, we know the string
-			 * matches without needing to look at the rest of it.
-			 */
-			if (c == '\0')
-				return 1;
-			/*
-			 * First try the shortest match for the '*' that
-			 * could work. We can forget any earlier '*' since
-			 * there is no way having it match more characters
-			 * can help us, given that we are already here.
-			 */
-			bt_p = p;
-			bt_q = q;
-			break;
-		case '[': {
-			const char *savep, *saveq;
-			int invert, found;
-			wchar_t chr;
-
-			savep = p, saveq = q;
-			invert = 0;
-			if (*p == '!' || *p == '^') {
-				invert++;
-				p++;
-			}
-			found = 0;
-			if (*q == '\0')
-				return 0;
-			if (localeisutf8) {
-				chr = get_wc(&q);
-				if (chr == 0)
-					goto backtrack;
-			} else
-				chr = (unsigned char)*q++;
-			c = *p++;
-			do {
-				if (c == '\0') {
-					p = savep, q = saveq;
-					c = '[';
-					goto dft;
-				}
-				if (c == '[' && *p == ':') {
-					found |= match_charclass(p, chr, &end);
-					if (end != NULL) {
-						p = end;
-						continue;
-					}
-				}
-				if (c == CTLESC)
-					c = *p++;
-				if (localeisutf8 && c & 0x80) {
-					p--;
-					wc = get_wc(&p);
-					if (wc == 0) /* bad utf-8 */
-						return 0;
-				} else
-					wc = (unsigned char)c;
-				if (*p == '-' && p[1] != ']') {
-					p++;
-					if (*p == CTLESC)
-						p++;
-					if (localeisutf8) {
-						wc2 = get_wc(&p);
-						if (wc2 == 0) /* bad utf-8 */
-							return 0;
-					} else
-						wc2 = (unsigned char)*p++;
-					if (   collate_range_cmp(chr, wc) >= 0
-					    && collate_range_cmp(chr, wc2) <= 0
-					   )
-						found = 1;
-				} else {
-					if (chr == wc)
-						found = 1;
-				}
-			} while ((c = *p++) != ']');
-			if (found == invert)
-				goto backtrack;
-			break;
-		}
-dft:	        default:
-			if (*q == '\0')
-				return 0;
-			if (*q++ == c)
-				break;
-backtrack:
-			/*
-			 * If we have a mismatch (other than hitting the end
-			 * of the string), go back to the last '*' seen and
-			 * have it match one additional character.
-			 */
-			if (bt_p == NULL)
-				return 0;
-			if (*bt_q == '\0')
-				return 0;
-			bt_q++;
-			p = bt_p;
-			q = bt_q;
-			break;
-		}
-	}
-}
-
-
-
-/*
- * Remove any CTLESC and CTLQUOTEMARK characters from a string.
- */
-
-void
-rmescapes(char *str)
-{
-	char *p, *q;
-
-	p = str;
-	while (*p != CTLESC && *p != CTLQUOTEMARK && *p != CTLQUOTEEND) {
-		if (*p++ == '\0')
-			return;
-	}
-	q = p;
-	while (*p) {
-		if (*p == CTLQUOTEMARK || *p == CTLQUOTEEND) {
-			p++;
-			continue;
-		}
-		if (*p == CTLESC)
-			p++;
-		*q++ = *p++;
-	}
-	*q = '\0';
-}
-
-
-
-/*
- * See if a pattern matches in a case statement.
- */
-
-int
-casematch(union node *pattern, const char *val)
-{
-	struct stackmark smark;
-	struct nodelist *argbackq;
-	int result;
-	char *p;
-
-	setstackmark(&smark);
-	argbackq = pattern->narg.backquote;
-	STARTSTACKSTR(expdest);
-	argstr(pattern->narg.text, &argbackq, EXP_TILDE | EXP_CASE, NULL);
-	STPUTC('\0', expdest);
-	p = grabstackstr(expdest);
-	result = patmatch(p, val);
-	popstackmark(&smark);
-	return result;
-}
-
-/*
- * Our own itoa().
- */
-
-static void
-cvtnum(int num, char *buf)
-{
-	char temp[32];
-	int neg = num < 0;
-	char *p = temp + 31;
-
-	temp[31] = '\0';
-
-	do {
-		*--p = num % 10 + '0';
-	} while ((num /= 10) != 0);
-
-	if (neg)
-		*--p = '-';
-
-	memcpy(buf, p, temp + 32 - p);
-}
-
-/*
- * Do most of the work for wordexp(3).
- */
-
-int
-wordexpcmd(int argc, char **argv)
-{
-	size_t len;
-	int i;
-
-	out1fmt("%08x", argc - 1);
-	for (i = 1, len = 0; i < argc; i++)
-		len += strlen(argv[i]);
-	out1fmt("%08x", (int)len);
-	for (i = 1; i < argc; i++)
-		outbin(argv[i], strlen(argv[i]) + 1, out1);
-        return (0);
-}
-
-/*
- * Do most of the work for wordexp(3), new version.
- */
-
-int
-freebsd_wordexpcmd(int argc __unused, char **argv __unused)
-{
-	struct arglist arglist;
-	union node *args, *n;
-	size_t len;
-	int ch;
-	int protected = 0;
-	int fd = -1;
-	int i;
-
-	while ((ch = nextopt("f:p")) != '\0') {
-		switch (ch) {
-		case 'f':
-			fd = number(shoptarg);
-			break;
-		case 'p':
-			protected = 1;
-			break;
-		}
-	}
-	if (*argptr != NULL)
-		error("wrong number of arguments");
-	if (fd < 0)
-		error("missing fd");
-	INTOFF;
-	setinputfd(fd, 1);
-	INTON;
-	args = parsewordexp();
-	popfile(); /* will also close fd */
-	if (protected)
-		for (n = args; n != NULL; n = n->narg.next) {
-			if (n->narg.backquote != NULL) {
-				outcslow('C', out1);
-				error("command substitution disabled");
-			}
-		}
-	outcslow(' ', out1);
-	emptyarglist(&arglist);
-	for (n = args; n != NULL; n = n->narg.next)
-		expandarg(n, &arglist, EXP_FULL | EXP_TILDE);
-	for (i = 0, len = 0; i < arglist.count; i++)
-		len += strlen(arglist.args[i]);
-	out1fmt("%016x %016zx", arglist.count, len);
-	for (i = 0; i < arglist.count; i++)
-		outbin(arglist.args[i], strlen(arglist.args[i]) + 1, out1);
-	return (0);
-}
diff --git a/bin/1sh/expand.h b/bin/1sh/expand.h
deleted file mode 100644
index 92e344d9..00000000
--- a/bin/1sh/expand.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)expand.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/expand.h 314436 2017-02-28 23:42:47Z imp $
- */
-
-struct arglist {
-	char **args;
-	int count;
-	int capacity;
-	char *smallarg[1];
-};
-
-/*
- * expandarg() flags
- */
-#define EXP_SPLIT	0x1	/* perform word splitting */
-#define EXP_TILDE	0x2	/* do normal tilde expansion */
-#define	EXP_VARTILDE	0x4	/* expand tildes in an assignment */
-#define EXP_CASE	0x10	/* keeps quotes around for CASE pattern */
-#define EXP_SPLIT_LIT	0x20	/* IFS split literal text ${v+-a b c} */
-#define EXP_LIT_QUOTED	0x40	/* for EXP_SPLIT_LIT, start off quoted */
-#define EXP_GLOB	0x80	/* perform file globbing */
-
-#define EXP_FULL	(EXP_SPLIT | EXP_GLOB)
-
-
-void emptyarglist(struct arglist *);
-void appendarglist(struct arglist *, char *);
-union node;
-void expandarg(union node *, struct arglist *, int);
-void rmescapes(char *);
-int casematch(union node *, const char *);
diff --git a/bin/1sh/histedit.c b/bin/1sh/histedit.c
deleted file mode 100644
index 12ff54b5..00000000
--- a/bin/1sh/histedit.c
+++ /dev/null
@@ -1,536 +0,0 @@
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)histedit.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/histedit.c 319635 2017-06-06 21:08:05Z jilles $");
-
-#include <sys/param.h>
-#include <limits.h>
-#include <paths.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-/*
- * Editline and history functions (and glue).
- */
-#include "shell.h"
-#include "parser.h"
-#include "var.h"
-#include "options.h"
-#include "main.h"
-#include "output.h"
-#include "mystring.h"
-#ifndef NO_HISTORY
-#include "myhistedit.h"
-#include "error.h"
-#include "eval.h"
-#include "memalloc.h"
-#include "builtins.h"
-
-#define MAXHISTLOOPS	4	/* max recursions through fc */
-#define DEFEDITOR	"ed"	/* default editor *should* be $EDITOR */
-
-History *hist;	/* history cookie */
-EditLine *el;	/* editline cookie */
-int displayhist;
-static FILE *el_in, *el_out, *el_err;
-
-static void history_load(const char *hf);
-static void history_save(const char *hf);
-
-static char *fc_replace(const char *, char *, char *);
-static int not_fcnumber(const char *);
-static int str_to_event(const char *, int);
-
-/*
- * Set history and editing status.  Called whenever the status may
- * have changed (figures out what to do).
- */
-void
-histedit(void)
-{
-
-#define editing (Eflag || Vflag)
-
-	if (iflag) {
-		if (!hist) {
-			/*
-			 * turn history on
-			 */
-			INTOFF;
-			hist = history_init();
-			INTON;
-
-			if (hist != NULL) {
-				sethistsize(histsizeval());
-				sethistfile(histfileval());
-			} else
-				out2fmt_flush("sh: can't initialize history\n");
-		}
-		if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
-			/*
-			 * turn editing on
-			 */
-			char *term;
-
-			INTOFF;
-			if (el_in == NULL)
-				el_in = fdopen(0, "r");
-			if (el_err == NULL)
-				el_err = fdopen(1, "w");
-			if (el_out == NULL)
-				el_out = fdopen(2, "w");
-			if (el_in == NULL || el_err == NULL || el_out == NULL)
-				goto bad;
-			term = lookupvar("TERM");
-			if (term)
-				setenv("TERM", term, 1);
-			else
-				unsetenv("TERM");
-			el = el_init(arg0, el_in, el_out, el_err);
-			if (el != NULL) {
-				if (hist)
-					el_set(el, EL_HIST, history, hist);
-				el_set(el, EL_PROMPT, getprompt);
-				el_set(el, EL_RPROMPT, getrprompt);
-				el_set(el, EL_ADDFN, "sh-complete",
-				    "Filename completion",
-				    _el_fn_sh_complete);
-			} else {
-bad:
-				out2fmt_flush("sh: can't initialize editing\n");
-			}
-			INTON;
-		} else if (!editing && el) {
-			INTOFF;
-			el_end(el);
-			el = NULL;
-			INTON;
-		}
-		if (el) {
-			el_source(el, NULL);
-			if (Vflag)
-				el_set(el, EL_EDITOR, "vi");
-			else if (Eflag)
-				el_set(el, EL_EDITOR, "emacs");
-			el_set(el, EL_BIND, "^I", "sh-complete", NULL);
-		}
-	} else {
-		INTOFF;
-		if (el) {	/* no editing if not interactive */
-			el_end(el);
-			el = NULL;
-		}
-		if (hist) {
-			if (*histfileval() != '\0')
-				history_save(histfileval());
-			history_end(hist);
-			hist = NULL;
-		}
-		INTON;
-	}
-}
-
-
-void
-sethistfile(const char *hf)
-{
-	if (hist != NULL && hf != NULL && *hf != '\0')
-		history_load(hf);
-}
-
-
-static void
-history_load(const char *hf) {
-	HistEvent he;
-
-	if (history(hist, &he, H_LOAD, hf) == -1)
-		warning("%s: %s", he.str, hf);
-}
-
-
-static void
-history_save(const char *hf) {
-	HistEvent he;
-
-	if (history(hist, &he, H_SAVE, hf) == -1)
-		warning("%s: %s", he.str, hf);
-}
-
-
-void
-sethistsize(const char *hs)
-{
-	int histsize;
-	HistEvent he;
-
-	if (hist != NULL) {
-		if (hs == NULL || !is_number(hs))
-			histsize = 100;
-		else
-			histsize = atoi(hs);
-		history(hist, &he, H_SETSIZE, histsize);
-		history(hist, &he, H_SETUNIQUE, 1);
-	}
-}
-
-void
-setterm(const char *term)
-{
-	if (rootshell && el != NULL && term != NULL)
-		el_set(el, EL_TERMINAL, term);
-}
-
-int
-histcmd(int argc, char **argv __unused)
-{
-	int ch;
-	const char *editor = NULL;
-	HistEvent he;
-	int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
-	int i, retval;
-	const char *firststr, *laststr;
-	int first, last, direction;
-	char *pat = NULL, *repl = NULL;
-	static int active = 0;
-	struct jmploc jmploc;
-	struct jmploc *savehandler;
-	char editfilestr[PATH_MAX];
-	char *volatile editfile;
-	FILE *efp = NULL;
-	int oldhistnum;
-
-	if (hist == NULL)
-		error("history not active");
-
-	if (argc == 1)
-		error("missing history argument");
-
-	while (not_fcnumber(*argptr) && (ch = nextopt("e:lnrs")) != '\0')
-		switch ((char)ch) {
-		case 'e':
-			editor = shoptarg;
-			break;
-		case 'l':
-			lflg = 1;
-			break;
-		case 'n':
-			nflg = 1;
-			break;
-		case 'r':
-			rflg = 1;
-			break;
-		case 's':
-			sflg = 1;
-			break;
-		}
-
-	savehandler = handler;
-	/*
-	 * If executing...
-	 */
-	if (lflg == 0 || editor || sflg) {
-		lflg = 0;	/* ignore */
-		editfile = NULL;
-		/*
-		 * Catch interrupts to reset active counter and
-		 * cleanup temp files.
-		 */
-		if (setjmp(jmploc.loc)) {
-			active = 0;
-			if (editfile)
-				unlink(editfile);
-			handler = savehandler;
-			longjmp(handler->loc, 1);
-		}
-		handler = &jmploc;
-		if (++active > MAXHISTLOOPS) {
-			active = 0;
-			displayhist = 0;
-			error("called recursively too many times");
-		}
-		/*
-		 * Set editor.
-		 */
-		if (sflg == 0) {
-			if (editor == NULL &&
-			    (editor = bltinlookup("FCEDIT", 1)) == NULL &&
-			    (editor = bltinlookup("EDITOR", 1)) == NULL)
-				editor = DEFEDITOR;
-			if (editor[0] == '-' && editor[1] == '\0') {
-				sflg = 1;	/* no edit */
-				editor = NULL;
-			}
-		}
-	}
-
-	/*
-	 * If executing, parse [old=new] now
-	 */
-	if (lflg == 0 && *argptr != NULL &&
-	     ((repl = strchr(*argptr, '=')) != NULL)) {
-		pat = *argptr;
-		*repl++ = '\0';
-		argptr++;
-	}
-	/*
-	 * determine [first] and [last]
-	 */
-	if (*argptr == NULL) {
-		firststr = lflg ? "-16" : "-1";
-		laststr = "-1";
-	} else if (argptr[1] == NULL) {
-		firststr = argptr[0];
-		laststr = lflg ? "-1" : argptr[0];
-	} else if (argptr[2] == NULL) {
-		firststr = argptr[0];
-		laststr = argptr[1];
-	} else
-		error("too many arguments");
-	/*
-	 * Turn into event numbers.
-	 */
-	first = str_to_event(firststr, 0);
-	last = str_to_event(laststr, 1);
-
-	if (rflg) {
-		i = last;
-		last = first;
-		first = i;
-	}
-	/*
-	 * XXX - this should not depend on the event numbers
-	 * always increasing.  Add sequence numbers or offset
-	 * to the history element in next (diskbased) release.
-	 */
-	direction = first < last ? H_PREV : H_NEXT;
-
-	/*
-	 * If editing, grab a temp file.
-	 */
-	if (editor) {
-		int fd;
-		INTOFF;		/* easier */
-		sprintf(editfilestr, "%s/_shXXXXXX", _PATH_TMP);
-		if ((fd = mkstemp(editfilestr)) < 0)
-			error("can't create temporary file %s", editfile);
-		editfile = editfilestr;
-		if ((efp = fdopen(fd, "w")) == NULL) {
-			close(fd);
-			error("Out of space");
-		}
-	}
-
-	/*
-	 * Loop through selected history events.  If listing or executing,
-	 * do it now.  Otherwise, put into temp file and call the editor
-	 * after.
-	 *
-	 * The history interface needs rethinking, as the following
-	 * convolutions will demonstrate.
-	 */
-	history(hist, &he, H_FIRST);
-	retval = history(hist, &he, H_NEXT_EVENT, first);
-	for (;retval != -1; retval = history(hist, &he, direction)) {
-		if (lflg) {
-			if (!nflg)
-				out1fmt("%5d ", he.num);
-			out1str(he.str);
-		} else {
-			const char *s = pat ?
-			   fc_replace(he.str, pat, repl) : he.str;
-
-			if (sflg) {
-				if (displayhist) {
-					out2str(s);
-					flushout(out2);
-				}
-				evalstring(s, 0);
-				if (displayhist && hist) {
-					/*
-					 *  XXX what about recursive and
-					 *  relative histnums.
-					 */
-					oldhistnum = he.num;
-					history(hist, &he, H_ENTER, s);
-					/*
-					 * XXX H_ENTER moves the internal
-					 * cursor, set it back to the current
-					 * entry.
-					 */
-					history(hist, &he,
-					    H_NEXT_EVENT, oldhistnum);
-				}
-			} else
-				fputs(s, efp);
-		}
-		/*
-		 * At end?  (if we were to lose last, we'd sure be
-		 * messed up).
-		 */
-		if (he.num == last)
-			break;
-	}
-	if (editor) {
-		char *editcmd;
-
-		fclose(efp);
-		INTON;
-		editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
-		sprintf(editcmd, "%s %s", editor, editfile);
-		evalstring(editcmd, 0);	/* XXX - should use no JC command */
-		readcmdfile(editfile);	/* XXX - should read back - quick tst */
-		unlink(editfile);
-	}
-
-	if (lflg == 0 && active > 0)
-		--active;
-	if (displayhist)
-		displayhist = 0;
-	handler = savehandler;
-	return 0;
-}
-
-static char *
-fc_replace(const char *s, char *p, char *r)
-{
-	char *dest;
-	int plen = strlen(p);
-
-	STARTSTACKSTR(dest);
-	while (*s) {
-		if (strncmp(s, p, plen) == 0) {
-			STPUTS(r, dest);
-			s += plen;
-			break;
-		}
-		STPUTC(*s++, dest);
-	}
-	STPUTS(s, dest);
-	STPUTC('\0', dest);
-	dest = grabstackstr(dest);
-
-	return (dest);
-}
-
-static int
-not_fcnumber(const char *s)
-{
-	if (s == NULL)
-		return (0);
-	if (*s == '-')
-		s++;
-	return (!is_number(s));
-}
-
-static int
-str_to_event(const char *str, int last)
-{
-	HistEvent he;
-	const char *s = str;
-	int relative = 0;
-	int i, retval;
-
-	retval = history(hist, &he, H_FIRST);
-	switch (*s) {
-	case '-':
-		relative = 1;
-		/*FALLTHROUGH*/
-	case '+':
-		s++;
-	}
-	if (is_number(s)) {
-		i = atoi(s);
-		if (relative) {
-			while (retval != -1 && i--) {
-				retval = history(hist, &he, H_NEXT);
-			}
-			if (retval == -1)
-				retval = history(hist, &he, H_LAST);
-		} else {
-			retval = history(hist, &he, H_NEXT_EVENT, i);
-			if (retval == -1) {
-				/*
-				 * the notion of first and last is
-				 * backwards to that of the history package
-				 */
-				retval = history(hist, &he, last ? H_FIRST : H_LAST);
-			}
-		}
-		if (retval == -1)
-			error("history number %s not found (internal error)",
-			       str);
-	} else {
-		/*
-		 * pattern
-		 */
-		retval = history(hist, &he, H_PREV_STR, str);
-		if (retval == -1)
-			error("history pattern not found: %s", str);
-	}
-	return (he.num);
-}
-
-int
-bindcmd(int argc, char **argv)
-{
-
-	if (el == NULL)
-		error("line editing is disabled");
-	return (el_parse(el, argc, __DECONST(const char **, argv)));
-}
-
-#else
-#include "error.h"
-
-int
-histcmd(int argc, char **argv)
-{
-
-	error("not compiled with history support");
-	/*NOTREACHED*/
-	return (0);
-}
-
-int
-bindcmd(int argc, char **argv)
-{
-
-	error("not compiled with line editing support");
-	return (0);
-}
-#endif
diff --git a/bin/1sh/input.c b/bin/1sh/input.c
deleted file mode 100644
index 24ba73b5..00000000
--- a/bin/1sh/input.c
+++ /dev/null
@@ -1,520 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)input.c	8.3 (Berkeley) 6/9/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/input.c 314436 2017-02-28 23:42:47Z imp $");
-
-#include <stdio.h>	/* defines BUFSIZ */
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-
-/*
- * This file implements the input routines used by the parser.
- */
-
-#include "shell.h"
-#include "redir.h"
-#include "syntax.h"
-#include "input.h"
-#include "output.h"
-#include "options.h"
-#include "memalloc.h"
-#include "error.h"
-#include "alias.h"
-#include "parser.h"
-#include "myhistedit.h"
-#include "trap.h"
-
-#define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */
-
-struct strpush {
-	struct strpush *prev;	/* preceding string on stack */
-	const char *prevstring;
-	int prevnleft;
-	int prevlleft;
-	struct alias *ap;	/* if push was associated with an alias */
-};
-
-/*
- * The parsefile structure pointed to by the global variable parsefile
- * contains information about the current file being read.
- */
-
-struct parsefile {
-	struct parsefile *prev;	/* preceding file on stack */
-	int linno;		/* current line */
-	int fd;			/* file descriptor (or -1 if string) */
-	int nleft;		/* number of chars left in this line */
-	int lleft;		/* number of lines left in this buffer */
-	const char *nextc;	/* next char in buffer */
-	char *buf;		/* input buffer */
-	struct strpush *strpush; /* for pushing strings at this level */
-	struct strpush basestrpush; /* so pushing one is fast */
-};
-
-
-int plinno = 1;			/* input line number */
-int parsenleft;			/* copy of parsefile->nleft */
-static int parselleft;		/* copy of parsefile->lleft */
-const char *parsenextc;		/* copy of parsefile->nextc */
-static char basebuf[BUFSIZ + 1];/* buffer for top level input file */
-static struct parsefile basepf = {	/* top level input file */
-	.nextc = basebuf,
-	.buf = basebuf
-};
-static struct parsefile *parsefile = &basepf;	/* current input file */
-int whichprompt;		/* 1 == PS1, 2 == PS2 */
-
-EditLine *el;			/* cookie for editline package */
-
-static void pushfile(void);
-static int preadfd(void);
-static void popstring(void);
-
-void
-resetinput(void)
-{
-	popallfiles();
-	parselleft = parsenleft = 0;	/* clear input buffer */
-}
-
-
-
-/*
- * Read a character from the script, returning PEOF on end of file.
- * Nul characters in the input are silently discarded.
- */
-
-int
-pgetc(void)
-{
-	return pgetc_macro();
-}
-
-
-static int
-preadfd(void)
-{
-	int nr;
-	parsenextc = parsefile->buf;
-
-retry:
-#ifndef NO_HISTORY
-	if (parsefile->fd == 0 && el) {
-		static const char *rl_cp;
-		static int el_len;
-
-		if (rl_cp == NULL) {
-			el_resize(el);
-			rl_cp = el_gets(el, &el_len);
-		}
-		if (rl_cp == NULL)
-			nr = el_len == 0 ? 0 : -1;
-		else {
-			nr = el_len;
-			if (nr > BUFSIZ)
-				nr = BUFSIZ;
-			memcpy(parsefile->buf, rl_cp, nr);
-			if (nr != el_len) {
-				el_len -= nr;
-				rl_cp += nr;
-			} else
-				rl_cp = NULL;
-		}
-	} else
-#endif
-		nr = read(parsefile->fd, parsefile->buf, BUFSIZ);
-
-	if (nr <= 0) {
-                if (nr < 0) {
-                        if (errno == EINTR)
-                                goto retry;
-                        if (parsefile->fd == 0 && errno == EWOULDBLOCK) {
-                                int flags = fcntl(0, F_GETFL, 0);
-                                if (flags >= 0 && flags & O_NONBLOCK) {
-                                        flags &=~ O_NONBLOCK;
-                                        if (fcntl(0, F_SETFL, flags) >= 0) {
-						out2fmt_flush("sh: turning off NDELAY mode\n");
-                                                goto retry;
-                                        }
-                                }
-                        }
-                }
-                nr = -1;
-	}
-	return nr;
-}
-
-/*
- * Refill the input buffer and return the next input character:
- *
- * 1) If a string was pushed back on the input, pop it;
- * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
- *    from a string so we can't refill the buffer, return EOF.
- * 3) If there is more in this buffer, use it else call read to fill it.
- * 4) Process input up to the next newline, deleting nul characters.
- */
-
-int
-preadbuffer(void)
-{
-	char *p, *q, *r, *end;
-	char savec;
-
-	while (parsefile->strpush) {
-		/*
-		 * Add a space to the end of an alias to ensure that the
-		 * alias remains in use while parsing its last word.
-		 * This avoids alias recursions.
-		 */
-		if (parsenleft == -1 && parsefile->strpush->ap != NULL)
-			return ' ';
-		popstring();
-		if (--parsenleft >= 0)
-			return (*parsenextc++);
-	}
-	if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
-		return PEOF;
-
-again:
-	if (parselleft <= 0) {
-		if ((parselleft = preadfd()) == -1) {
-			parselleft = parsenleft = EOF_NLEFT;
-			return PEOF;
-		}
-	}
-
-	p = parsefile->buf + (parsenextc - parsefile->buf);
-	end = p + parselleft;
-	*end = '\0';
-	q = strchr(p, '\n');
-	if (!q) q = strchr(p, '\0');
-	if (q != end && *q == '\0') {
-		/* delete nul characters */
-		for (r = q; q != end; q++) {
-			if (*q != '\0')
-				*r++ = *q;
-		}
-		parselleft -= end - r;
-		if (parselleft == 0)
-			goto again;
-		end = p + parselleft;
-		*end = '\0';
-		q = strchr(p, '\n');
-		if (!q) q = strchr(p, '\0');
-	}
-	if (q == end) {
-		parsenleft = parselleft;
-		parselleft = 0;
-	} else /* *q == '\n' */ {
-		q++;
-		parsenleft = q - parsenextc;
-		parselleft -= parsenleft;
-	}
-	parsenleft--;
-
-	savec = *q;
-	*q = '\0';
-
-#ifndef NO_HISTORY
-	if (parsefile->fd == 0 && hist &&
-	    parsenextc[strspn(parsenextc, " \t\n")] != '\0') {
-		HistEvent he;
-		INTOFF;
-		history(hist, &he, whichprompt == 1 ? H_ENTER : H_ADD,
-		    parsenextc);
-		INTON;
-	}
-#endif
-
-	if (vflag) {
-		out2str(parsenextc);
-		flushout(out2);
-	}
-
-	*q = savec;
-
-	return *parsenextc++;
-}
-
-/*
- * Returns if we are certain we are at EOF. Does not cause any more input
- * to be read from the outside world.
- */
-
-int
-preadateof(void)
-{
-	if (parsenleft > 0)
-		return 0;
-	if (parsefile->strpush)
-		return 0;
-	if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
-		return 1;
-	return 0;
-}
-
-/*
- * Undo the last call to pgetc.  Only one character may be pushed back.
- * PEOF may be pushed back.
- */
-
-void
-pungetc(void)
-{
-	parsenleft++;
-	parsenextc--;
-}
-
-/*
- * Push a string back onto the input at this current parsefile level.
- * We handle aliases this way.
- */
-void
-pushstring(const char *s, int len, struct alias *ap)
-{
-	struct strpush *sp;
-
-	INTOFF;
-/*out2fmt_flush("*** calling pushstring: %s, %d\n", s, len);*/
-	if (parsefile->strpush) {
-		sp = ckmalloc(sizeof (struct strpush));
-		sp->prev = parsefile->strpush;
-		parsefile->strpush = sp;
-	} else
-		sp = parsefile->strpush = &(parsefile->basestrpush);
-	sp->prevstring = parsenextc;
-	sp->prevnleft = parsenleft;
-	sp->prevlleft = parselleft;
-	sp->ap = ap;
-	if (ap)
-		ap->flag |= ALIASINUSE;
-	parsenextc = s;
-	parsenleft = len;
-	INTON;
-}
-
-static void
-popstring(void)
-{
-	struct strpush *sp = parsefile->strpush;
-
-	INTOFF;
-	if (sp->ap) {
-		if (parsenextc != sp->ap->val &&
-		    (parsenextc[-1] == ' ' || parsenextc[-1] == '\t'))
-			forcealias();
-		sp->ap->flag &= ~ALIASINUSE;
-	}
-	parsenextc = sp->prevstring;
-	parsenleft = sp->prevnleft;
-	parselleft = sp->prevlleft;
-/*out2fmt_flush("*** calling popstring: restoring to '%s'\n", parsenextc);*/
-	parsefile->strpush = sp->prev;
-	if (sp != &(parsefile->basestrpush))
-		ckfree(sp);
-	INTON;
-}
-
-/*
- * Set the input to take input from a file.  If push is set, push the
- * old input onto the stack first.
- */
-
-void
-setinputfile(const char *fname, int push)
-{
-	int fd;
-	int fd2;
-
-	INTOFF;
-	if ((fd = open(fname, O_RDONLY | O_CLOEXEC)) < 0)
-		error("cannot open %s: %s", fname, strerror(errno));
-	if (fd < 10) {
-		fd2 = fcntl(fd, F_DUPFD_CLOEXEC, 10);
-		close(fd);
-		if (fd2 < 0)
-			error("Out of file descriptors");
-		fd = fd2;
-	}
-	setinputfd(fd, push);
-	INTON;
-}
-
-
-/*
- * Like setinputfile, but takes an open file descriptor (which should have
- * its FD_CLOEXEC flag already set).  Call this with interrupts off.
- */
-
-void
-setinputfd(int fd, int push)
-{
-	if (push) {
-		pushfile();
-		parsefile->buf = ckmalloc(BUFSIZ + 1);
-	}
-	if (parsefile->fd > 0)
-		close(parsefile->fd);
-	parsefile->fd = fd;
-	if (parsefile->buf == NULL)
-		parsefile->buf = ckmalloc(BUFSIZ + 1);
-	parselleft = parsenleft = 0;
-	plinno = 1;
-}
-
-
-/*
- * Like setinputfile, but takes input from a string.
- */
-
-void
-setinputstring(const char *string, int push)
-{
-	INTOFF;
-	if (push)
-		pushfile();
-	parsenextc = string;
-	parselleft = parsenleft = strlen(string);
-	parsefile->buf = NULL;
-	plinno = 1;
-	INTON;
-}
-
-
-
-/*
- * To handle the "." command, a stack of input files is used.  Pushfile
- * adds a new entry to the stack and popfile restores the previous level.
- */
-
-static void
-pushfile(void)
-{
-	struct parsefile *pf;
-
-	parsefile->nleft = parsenleft;
-	parsefile->lleft = parselleft;
-	parsefile->nextc = parsenextc;
-	parsefile->linno = plinno;
-	pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile));
-	pf->prev = parsefile;
-	pf->fd = -1;
-	pf->strpush = NULL;
-	pf->basestrpush.prev = NULL;
-	parsefile = pf;
-}
-
-
-void
-popfile(void)
-{
-	struct parsefile *pf = parsefile;
-
-	INTOFF;
-	if (pf->fd >= 0)
-		close(pf->fd);
-	if (pf->buf)
-		ckfree(pf->buf);
-	while (pf->strpush)
-		popstring();
-	parsefile = pf->prev;
-	ckfree(pf);
-	parsenleft = parsefile->nleft;
-	parselleft = parsefile->lleft;
-	parsenextc = parsefile->nextc;
-	plinno = parsefile->linno;
-	INTON;
-}
-
-
-/*
- * Return current file (to go back to it later using popfilesupto()).
- */
-
-struct parsefile *
-getcurrentfile(void)
-{
-	return parsefile;
-}
-
-
-/*
- * Pop files until the given file is on top again. Useful for regular
- * builtins that read shell commands from files or strings.
- * If the given file is not an active file, an error is raised.
- */
-
-void
-popfilesupto(struct parsefile *file)
-{
-	while (parsefile != file && parsefile != &basepf)
-		popfile();
-	if (parsefile != file)
-		error("popfilesupto() misused");
-}
-
-/*
- * Return to top level.
- */
-
-void
-popallfiles(void)
-{
-	while (parsefile != &basepf)
-		popfile();
-}
-
-
-
-/*
- * Close the file(s) that the shell is reading commands from.  Called
- * after a fork is done.
- */
-
-void
-closescript(void)
-{
-	popallfiles();
-	if (parsefile->fd > 0) {
-		close(parsefile->fd);
-		parsefile->fd = 0;
-	}
-}
diff --git a/bin/1sh/input.h b/bin/1sh/input.h
deleted file mode 100644
index 2a04921d..00000000
--- a/bin/1sh/input.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)input.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/input.h 314436 2017-02-28 23:42:47Z imp $
- */
-
-/* PEOF (the end of file marker) is defined in syntax.h */
-
-/*
- * The input line number.  Input.c just defines this variable, and saves
- * and restores it when files are pushed and popped.  The user of this
- * package must set its value.
- */
-extern int plinno;
-extern int parsenleft;		/* number of characters left in input buffer */
-extern const char *parsenextc;	/* next character in input buffer */
-
-struct alias;
-struct parsefile;
-
-void resetinput(void);
-int pgetc(void);
-int preadbuffer(void);
-int preadateof(void);
-void pungetc(void);
-void pushstring(const char *, int, struct alias *);
-void setinputfile(const char *, int);
-void setinputfd(int, int);
-void setinputstring(const char *, int);
-void popfile(void);
-struct parsefile *getcurrentfile(void);
-void popfilesupto(struct parsefile *);
-void popallfiles(void);
-void closescript(void);
-
-#define pgetc_macro()	(--parsenleft >= 0? *parsenextc++ : preadbuffer())
diff --git a/bin/1sh/jobs.c b/bin/1sh/jobs.c
deleted file mode 100644
index 88703edd..00000000
--- a/bin/1sh/jobs.c
+++ /dev/null
@@ -1,1552 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)jobs.c	8.5 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/jobs.c 328818 2018-02-02 22:53:58Z jilles $");
-
-#include <sys/ioctl.h>
-#include <sys/param.h>
-#include <sys/resource.h>
-#include <sys/time.h>
-#include <sys/wait.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <paths.h>
-#include <signal.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include "shell.h"
-#if JOBS
-#include <termios.h>
-#undef CEOF			/* syntax.h redefines this */
-#endif
-#include "redir.h"
-#include "exec.h"
-#include "show.h"
-#include "main.h"
-#include "parser.h"
-#include "nodes.h"
-#include "jobs.h"
-#include "options.h"
-#include "trap.h"
-#include "syntax.h"
-#include "input.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "var.h"
-#include "builtins.h"
-
-
-/*
- * A job structure contains information about a job.  A job is either a
- * single process or a set of processes contained in a pipeline.  In the
- * latter case, pidlist will be non-NULL, and will point to a -1 terminated
- * array of pids.
- */
-
-struct procstat {
-	pid_t pid;		/* process id */
-	int status;		/* status flags (defined above) */
-	char *cmd;		/* text of command being run */
-};
-
-
-/* states */
-#define JOBSTOPPED 1		/* all procs are stopped */
-#define JOBDONE 2		/* all procs are completed */
-
-
-struct job {
-	struct procstat ps0;	/* status of process */
-	struct procstat *ps;	/* status or processes when more than one */
-	short nprocs;		/* number of processes */
-	pid_t pgrp;		/* process group of this job */
-	char state;		/* true if job is finished */
-	char used;		/* true if this entry is in used */
-	char changed;		/* true if status has changed */
-	char foreground;	/* true if running in the foreground */
-	char remembered;	/* true if $! referenced */
-#if JOBS
-	char jobctl;		/* job running under job control */
-	struct job *next;	/* job used after this one */
-#endif
-};
-
-
-static struct job *jobtab;	/* array of jobs */
-static int njobs;		/* size of array */
-static pid_t backgndpid = -1;	/* pid of last background process */
-static struct job *bgjob = NULL; /* last background process */
-#if JOBS
-static struct job *jobmru;	/* most recently used job list */
-static pid_t initialpgrp;	/* pgrp of shell on invocation */
-#endif
-static int ttyfd = -1;
-
-/* mode flags for dowait */
-#define DOWAIT_BLOCK	0x1 /* wait until a child exits */
-#define DOWAIT_SIG	0x2 /* if DOWAIT_BLOCK, abort on signal */
-#define DOWAIT_SIG_TRAP	0x4 /* if DOWAIT_SIG, abort on trapped signal only */
-
-#if JOBS
-static void restartjob(struct job *);
-#endif
-static void freejob(struct job *);
-static int waitcmdloop(struct job *);
-static struct job *getjob_nonotfound(const char *);
-static struct job *getjob(const char *);
-pid_t killjob(const char *, int);
-static pid_t dowait(int, struct job *);
-static void checkzombies(void);
-static void cmdtxt(union node *);
-static void cmdputs(const char *);
-#if JOBS
-static void setcurjob(struct job *);
-static void deljob(struct job *);
-static struct job *getcurjob(struct job *);
-#endif
-static void printjobcmd(struct job *);
-static void showjob(struct job *, int);
-
-
-/*
- * Turn job control on and off.
- */
-
-static int jobctl;
-
-#if JOBS
-static void
-jobctl_notty(void)
-{
-	if (ttyfd >= 0) {
-		close(ttyfd);
-		ttyfd = -1;
-	}
-	if (!iflag) {
-		setsignal(SIGTSTP);
-		setsignal(SIGTTOU);
-		setsignal(SIGTTIN);
-		jobctl = 1;
-		return;
-	}
-	out2fmt_flush("sh: can't access tty; job control turned off\n");
-	mflag = 0;
-}
-
-void
-setjobctl(int on)
-{
-	int i;
-
-	if (on == jobctl || rootshell == 0)
-		return;
-	if (on) {
-		if (ttyfd != -1)
-			close(ttyfd);
-		if ((ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC)) < 0) {
-			i = 0;
-			while (i <= 2 && !isatty(i))
-				i++;
-			if (i > 2 ||
-			    (ttyfd = fcntl(i, F_DUPFD_CLOEXEC, 10)) < 0) {
-				jobctl_notty();
-				return;
-			}
-		}
-		if (ttyfd < 10) {
-			/*
-			 * Keep our TTY file descriptor out of the way of
-			 * the user's redirections.
-			 */
-			if ((i = fcntl(ttyfd, F_DUPFD_CLOEXEC, 10)) < 0) {
-				jobctl_notty();
-				return;
-			}
-			close(ttyfd);
-			ttyfd = i;
-		}
-		do { /* while we are in the background */
-			initialpgrp = tcgetpgrp(ttyfd);
-			if (initialpgrp < 0) {
-				jobctl_notty();
-				return;
-			}
-			if (initialpgrp != getpgrp()) {
-				if (!iflag) {
-					initialpgrp = -1;
-					jobctl_notty();
-					return;
-				}
-				kill(0, SIGTTIN);
-				continue;
-			}
-		} while (0);
-		setsignal(SIGTSTP);
-		setsignal(SIGTTOU);
-		setsignal(SIGTTIN);
-		setpgid(0, rootpid);
-		tcsetpgrp(ttyfd, rootpid);
-	} else { /* turning job control off */
-		setpgid(0, initialpgrp);
-		if (ttyfd >= 0) {
-			tcsetpgrp(ttyfd, initialpgrp);
-			close(ttyfd);
-			ttyfd = -1;
-		}
-		setsignal(SIGTSTP);
-		setsignal(SIGTTOU);
-		setsignal(SIGTTIN);
-	}
-	jobctl = on;
-}
-#endif
-
-
-#if JOBS
-int
-fgcmd(int argc __unused, char **argv __unused)
-{
-	struct job *jp;
-	pid_t pgrp;
-	int status;
-
-	nextopt("");
-	jp = getjob(*argptr);
-	if (jp->jobctl == 0)
-		error("job not created under job control");
-	printjobcmd(jp);
-	flushout(&output);
-	pgrp = jp->ps[0].pid;
-	if (ttyfd >= 0)
-		tcsetpgrp(ttyfd, pgrp);
-	restartjob(jp);
-	jp->foreground = 1;
-	INTOFF;
-	status = waitforjob(jp, (int *)NULL);
-	INTON;
-	return status;
-}
-
-
-int
-bgcmd(int argc __unused, char **argv __unused)
-{
-	struct job *jp;
-
-	nextopt("");
-	do {
-		jp = getjob(*argptr);
-		if (jp->jobctl == 0)
-			error("job not created under job control");
-		if (jp->state == JOBDONE)
-			continue;
-		restartjob(jp);
-		jp->foreground = 0;
-		out1fmt("[%td] ", jp - jobtab + 1);
-		printjobcmd(jp);
-	} while (*argptr != NULL && *++argptr != NULL);
-	return 0;
-}
-
-
-static void
-restartjob(struct job *jp)
-{
-	struct procstat *ps;
-	int i;
-
-	if (jp->state == JOBDONE)
-		return;
-	setcurjob(jp);
-	INTOFF;
-	kill(-jp->ps[0].pid, SIGCONT);
-	for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) {
-		if (WIFSTOPPED(ps->status)) {
-			ps->status = -1;
-			jp->state = 0;
-		}
-	}
-	INTON;
-}
-#endif
-
-
-int
-jobscmd(int argc __unused, char *argv[] __unused)
-{
-	char *id;
-	int ch, mode;
-
-	mode = SHOWJOBS_DEFAULT;
-	while ((ch = nextopt("lps")) != '\0') {
-		switch (ch) {
-		case 'l':
-			mode = SHOWJOBS_VERBOSE;
-			break;
-		case 'p':
-			mode = SHOWJOBS_PGIDS;
-			break;
-		case 's':
-			mode = SHOWJOBS_PIDS;
-			break;
-		}
-	}
-
-	if (*argptr == NULL)
-		showjobs(0, mode);
-	else
-		while ((id = *argptr++) != NULL)
-			showjob(getjob(id), mode);
-
-	return (0);
-}
-
-static void
-printjobcmd(struct job *jp)
-{
-	struct procstat *ps;
-	int i;
-
-	for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) {
-		out1str(ps->cmd);
-		if (i > 0)
-			out1str(" | ");
-	}
-	out1c('\n');
-}
-
-static void
-showjob(struct job *jp, int mode)
-{
-	char s[64];
-	char statebuf[16];
-	const char *statestr, *coredump;
-	struct procstat *ps;
-	struct job *j;
-	int col, curr, i, jobno, prev, procno, status;
-	char c;
-
-	procno = (mode == SHOWJOBS_PGIDS) ? 1 : jp->nprocs;
-	jobno = jp - jobtab + 1;
-	curr = prev = 0;
-#if JOBS
-	if ((j = getcurjob(NULL)) != NULL) {
-		curr = j - jobtab + 1;
-		if ((j = getcurjob(j)) != NULL)
-			prev = j - jobtab + 1;
-	}
-#endif
-	coredump = "";
-	status = jp->ps[jp->nprocs - 1].status;
-	if (jp->state == 0) {
-		statestr = "Running";
-#if JOBS
-	} else if (jp->state == JOBSTOPPED) {
-		ps = jp->ps + jp->nprocs - 1;
-		while (!WIFSTOPPED(ps->status) && ps > jp->ps)
-			ps--;
-		if (WIFSTOPPED(ps->status))
-			i = WSTOPSIG(ps->status);
-		else
-			i = -1;
-		statestr = strsignal(i);
-		if (statestr == NULL)
-			statestr = "Suspended";
-#endif
-	} else if (WIFEXITED(status)) {
-		if (WEXITSTATUS(status) == 0)
-			statestr = "Done";
-		else {
-			fmtstr(statebuf, sizeof(statebuf), "Done(%d)",
-			    WEXITSTATUS(status));
-			statestr = statebuf;
-		}
-	} else {
-		i = WTERMSIG(status);
-		statestr = strsignal(i);
-		if (statestr == NULL)
-			statestr = "Unknown signal";
-		if (WCOREDUMP(status))
-			coredump = " (core dumped)";
-	}
-
-	for (ps = jp->ps ; procno > 0 ; ps++, procno--) { /* for each process */
-		if (mode == SHOWJOBS_PIDS || mode == SHOWJOBS_PGIDS) {
-			out1fmt("%d\n", (int)ps->pid);
-			continue;
-		}
-		if (mode != SHOWJOBS_VERBOSE && ps != jp->ps)
-			continue;
-		if (jobno == curr && ps == jp->ps)
-			c = '+';
-		else if (jobno == prev && ps == jp->ps)
-			c = '-';
-		else
-			c = ' ';
-		if (ps == jp->ps)
-			fmtstr(s, 64, "[%d] %c ", jobno, c);
-		else
-			fmtstr(s, 64, "    %c ", c);
-		out1str(s);
-		col = strlen(s);
-		if (mode == SHOWJOBS_VERBOSE) {
-			fmtstr(s, 64, "%d ", (int)ps->pid);
-			out1str(s);
-			col += strlen(s);
-		}
-		if (ps == jp->ps) {
-			out1str(statestr);
-			out1str(coredump);
-			col += strlen(statestr) + strlen(coredump);
-		}
-		do {
-			out1c(' ');
-			col++;
-		} while (col < 30);
-		if (mode == SHOWJOBS_VERBOSE) {
-			out1str(ps->cmd);
-			out1c('\n');
-		} else
-			printjobcmd(jp);
-	}
-}
-
-/*
- * Print a list of jobs.  If "change" is nonzero, only print jobs whose
- * statuses have changed since the last call to showjobs.
- *
- * If the shell is interrupted in the process of creating a job, the
- * result may be a job structure containing zero processes.  Such structures
- * will be freed here.
- */
-
-void
-showjobs(int change, int mode)
-{
-	int jobno;
-	struct job *jp;
-
-	TRACE(("showjobs(%d) called\n", change));
-	checkzombies();
-	for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) {
-		if (! jp->used)
-			continue;
-		if (jp->nprocs == 0) {
-			freejob(jp);
-			continue;
-		}
-		if (change && ! jp->changed)
-			continue;
-		showjob(jp, mode);
-		if (mode == SHOWJOBS_DEFAULT || mode == SHOWJOBS_VERBOSE) {
-			jp->changed = 0;
-			/* Hack: discard jobs for which $! has not been
-			 * referenced in interactive mode when they terminate.
-			 */
-			if (jp->state == JOBDONE && !jp->remembered &&
-					(iflag || jp != bgjob)) {
-				freejob(jp);
-			}
-		}
-	}
-}
-
-
-/*
- * Mark a job structure as unused.
- */
-
-static void
-freejob(struct job *jp)
-{
-	struct procstat *ps;
-	int i;
-
-	INTOFF;
-	if (bgjob == jp)
-		bgjob = NULL;
-	for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) {
-		if (ps->cmd != nullstr)
-			ckfree(ps->cmd);
-	}
-	if (jp->ps != &jp->ps0)
-		ckfree(jp->ps);
-	jp->used = 0;
-#if JOBS
-	deljob(jp);
-#endif
-	INTON;
-}
-
-
-
-int
-waitcmd(int argc __unused, char **argv __unused)
-{
-	struct job *job;
-	int retval;
-
-	nextopt("");
-	if (*argptr == NULL)
-		return (waitcmdloop(NULL));
-
-	do {
-		job = getjob_nonotfound(*argptr);
-		if (job == NULL)
-			retval = 127;
-		else
-			retval = waitcmdloop(job);
-		argptr++;
-	} while (*argptr != NULL);
-
-	return (retval);
-}
-
-static int
-waitcmdloop(struct job *job)
-{
-	int status, retval, sig;
-	struct job *jp;
-
-	/*
-	 * Loop until a process is terminated or stopped, or a SIGINT is
-	 * received.
-	 */
-
-	do {
-		if (job != NULL) {
-			if (job->state == JOBDONE) {
-				status = job->ps[job->nprocs - 1].status;
-				if (WIFEXITED(status))
-					retval = WEXITSTATUS(status);
-				else
-					retval = WTERMSIG(status) + 128;
-				if (! iflag || ! job->changed)
-					freejob(job);
-				else {
-					job->remembered = 0;
-					if (job == bgjob)
-						bgjob = NULL;
-				}
-				return retval;
-			}
-		} else {
-			for (jp = jobtab ; jp < jobtab + njobs; jp++)
-				if (jp->used && jp->state == JOBDONE) {
-					if (! iflag || ! jp->changed)
-						freejob(jp);
-					else {
-						jp->remembered = 0;
-						if (jp == bgjob)
-							bgjob = NULL;
-					}
-				}
-			for (jp = jobtab ; ; jp++) {
-				if (jp >= jobtab + njobs) {	/* no running procs */
-					return 0;
-				}
-				if (jp->used && jp->state == 0)
-					break;
-			}
-		}
-	} while (dowait(DOWAIT_BLOCK | DOWAIT_SIG, (struct job *)NULL) != -1);
-
-	sig = pendingsig_waitcmd;
-	pendingsig_waitcmd = 0;
-	return sig + 128;
-}
-
-
-
-int
-jobidcmd(int argc __unused, char **argv __unused)
-{
-	struct job *jp;
-	int i;
-
-	nextopt("");
-	jp = getjob(*argptr);
-	for (i = 0 ; i < jp->nprocs ; ) {
-		out1fmt("%d", (int)jp->ps[i].pid);
-		out1c(++i < jp->nprocs? ' ' : '\n');
-	}
-	return 0;
-}
-
-
-
-/*
- * Convert a job name to a job structure.
- */
-
-static struct job *
-getjob_nonotfound(const char *name)
-{
-	int jobno;
-	struct job *found, *jp;
-	size_t namelen;
-	pid_t pid;
-	int i;
-
-	if (name == NULL) {
-#if JOBS
-		name = "%+";
-#else
-		error("No current job");
-#endif
-	}
-	if (name[0] == '%') {
-		if (is_digit(name[1])) {
-			jobno = number(name + 1);
-			if (jobno > 0 && jobno <= njobs
-			 && jobtab[jobno - 1].used != 0)
-				return &jobtab[jobno - 1];
-#if JOBS
-		} else if ((name[1] == '%' || name[1] == '+') &&
-		    name[2] == '\0') {
-			if ((jp = getcurjob(NULL)) == NULL)
-				error("No current job");
-			return (jp);
-		} else if (name[1] == '-' && name[2] == '\0') {
-			if ((jp = getcurjob(NULL)) == NULL ||
-			    (jp = getcurjob(jp)) == NULL)
-				error("No previous job");
-			return (jp);
-#endif
-		} else if (name[1] == '?') {
-			found = NULL;
-			for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
-				if (jp->used && jp->nprocs > 0
-				 && strstr(jp->ps[0].cmd, name + 2) != NULL) {
-					if (found)
-						error("%s: ambiguous", name);
-					found = jp;
-				}
-			}
-			if (found != NULL)
-				return (found);
-		} else {
-			namelen = strlen(name);
-			found = NULL;
-			for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
-				if (jp->used && jp->nprocs > 0
-				 && strncmp(jp->ps[0].cmd, name + 1,
-				 namelen - 1) == 0) {
-					if (found)
-						error("%s: ambiguous", name);
-					found = jp;
-				}
-			}
-			if (found)
-				return found;
-		}
-	} else if (is_number(name)) {
-		pid = (pid_t)number(name);
-		for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
-			if (jp->used && jp->nprocs > 0
-			 && jp->ps[jp->nprocs - 1].pid == pid)
-				return jp;
-		}
-	}
-	return NULL;
-}
-
-
-static struct job *
-getjob(const char *name)
-{
-	struct job *jp;
-
-	jp = getjob_nonotfound(name);
-	if (jp == NULL)
-		error("No such job: %s", name);
-	return (jp);
-}
-
-
-int
-killjob(const char *name, int sig)
-{
-	struct job *jp;
-	int i, ret;
-
-	jp = getjob(name);
-	if (jp->state == JOBDONE)
-		return 0;
-	if (jp->jobctl)
-		return kill(-jp->ps[0].pid, sig);
-	ret = -1;
-	errno = ESRCH;
-	for (i = 0; i < jp->nprocs; i++)
-		if (jp->ps[i].status == -1 || WIFSTOPPED(jp->ps[i].status)) {
-			if (kill(jp->ps[i].pid, sig) == 0)
-				ret = 0;
-		} else
-			ret = 0;
-	return ret;
-}
-
-/*
- * Return a new job structure,
- */
-
-struct job *
-makejob(union node *node __unused, int nprocs)
-{
-	int i;
-	struct job *jp;
-
-	for (i = njobs, jp = jobtab ; ; jp++) {
-		if (--i < 0) {
-			INTOFF;
-			if (njobs == 0) {
-				jobtab = ckmalloc(4 * sizeof jobtab[0]);
-#if JOBS
-				jobmru = NULL;
-#endif
-			} else {
-				jp = ckmalloc((njobs + 4) * sizeof jobtab[0]);
-				memcpy(jp, jobtab, njobs * sizeof jp[0]);
-#if JOBS
-				/* Relocate `next' pointers and list head */
-				if (jobmru != NULL)
-					jobmru = &jp[jobmru - jobtab];
-				for (i = 0; i < njobs; i++)
-					if (jp[i].next != NULL)
-						jp[i].next = &jp[jp[i].next -
-						    jobtab];
-#endif
-				if (bgjob != NULL)
-					bgjob = &jp[bgjob - jobtab];
-				/* Relocate `ps' pointers */
-				for (i = 0; i < njobs; i++)
-					if (jp[i].ps == &jobtab[i].ps0)
-						jp[i].ps = &jp[i].ps0;
-				ckfree(jobtab);
-				jobtab = jp;
-			}
-			jp = jobtab + njobs;
-			for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0)
-				;
-			INTON;
-			break;
-		}
-		if (jp->used == 0)
-			break;
-	}
-	INTOFF;
-	jp->state = 0;
-	jp->used = 1;
-	jp->changed = 0;
-	jp->nprocs = 0;
-	jp->foreground = 0;
-	jp->remembered = 0;
-#if JOBS
-	jp->jobctl = jobctl;
-	jp->next = NULL;
-#endif
-	if (nprocs > 1) {
-		jp->ps = ckmalloc(nprocs * sizeof (struct procstat));
-	} else {
-		jp->ps = &jp->ps0;
-	}
-	INTON;
-	TRACE(("makejob(%p, %d) returns %%%td\n", (void *)node, nprocs,
-	    jp - jobtab + 1));
-	return jp;
-}
-
-#if JOBS
-static void
-setcurjob(struct job *cj)
-{
-	struct job *jp, *prev;
-
-	for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) {
-		if (jp == cj) {
-			if (prev != NULL)
-				prev->next = jp->next;
-			else
-				jobmru = jp->next;
-			jp->next = jobmru;
-			jobmru = cj;
-			return;
-		}
-	}
-	cj->next = jobmru;
-	jobmru = cj;
-}
-
-static void
-deljob(struct job *j)
-{
-	struct job *jp, *prev;
-
-	for (prev = NULL, jp = jobmru; jp != NULL; prev = jp, jp = jp->next) {
-		if (jp == j) {
-			if (prev != NULL)
-				prev->next = jp->next;
-			else
-				jobmru = jp->next;
-			return;
-		}
-	}
-}
-
-/*
- * Return the most recently used job that isn't `nj', and preferably one
- * that is stopped.
- */
-static struct job *
-getcurjob(struct job *nj)
-{
-	struct job *jp;
-
-	/* Try to find a stopped one.. */
-	for (jp = jobmru; jp != NULL; jp = jp->next)
-		if (jp->used && jp != nj && jp->state == JOBSTOPPED)
-			return (jp);
-	/* Otherwise the most recently used job that isn't `nj' */
-	for (jp = jobmru; jp != NULL; jp = jp->next)
-		if (jp->used && jp != nj)
-			return (jp);
-
-	return (NULL);
-}
-
-#endif
-
-/*
- * Fork of a subshell.  If we are doing job control, give the subshell its
- * own process group.  Jp is a job structure that the job is to be added to.
- * N is the command that will be evaluated by the child.  Both jp and n may
- * be NULL.  The mode parameter can be one of the following:
- *	FORK_FG - Fork off a foreground process.
- *	FORK_BG - Fork off a background process.
- *	FORK_NOJOB - Like FORK_FG, but don't give the process its own
- *		     process group even if job control is on.
- *
- * When job control is turned off, background processes have their standard
- * input redirected to /dev/null (except for the second and later processes
- * in a pipeline).
- */
-
-pid_t
-forkshell(struct job *jp, union node *n, int mode)
-{
-	pid_t pid;
-	pid_t pgrp;
-
-	TRACE(("forkshell(%%%td, %p, %d) called\n", jp - jobtab, (void *)n,
-	    mode));
-	INTOFF;
-	if (mode == FORK_BG && (jp == NULL || jp->nprocs == 0))
-		checkzombies();
-	flushall();
-	pid = fork();
-	if (pid == -1) {
-		TRACE(("Fork failed, errno=%d\n", errno));
-		INTON;
-		error("Cannot fork: %s", strerror(errno));
-	}
-	if (pid == 0) {
-		struct job *p;
-		int wasroot;
-		int i;
-
-		TRACE(("Child shell %d\n", (int)getpid()));
-		wasroot = rootshell;
-		rootshell = 0;
-		handler = &main_handler;
-		closescript();
-		INTON;
-		forcelocal = 0;
-		clear_traps();
-#if JOBS
-		jobctl = 0;		/* do job control only in root shell */
-		if (wasroot && mode != FORK_NOJOB && mflag) {
-			if (jp == NULL || jp->nprocs == 0)
-				pgrp = getpid();
-			else
-				pgrp = jp->ps[0].pid;
-			if (setpgid(0, pgrp) == 0 && mode == FORK_FG &&
-			    ttyfd >= 0) {
-				/*** this causes superfluous TIOCSPGRPS ***/
-				if (tcsetpgrp(ttyfd, pgrp) < 0)
-					error("tcsetpgrp failed, errno=%d", errno);
-			}
-			setsignal(SIGTSTP);
-			setsignal(SIGTTOU);
-		} else if (mode == FORK_BG) {
-			ignoresig(SIGINT);
-			ignoresig(SIGQUIT);
-			if ((jp == NULL || jp->nprocs == 0) &&
-			    ! fd0_redirected_p ()) {
-				close(0);
-				if (open(_PATH_DEVNULL, O_RDONLY) != 0)
-					error("cannot open %s: %s",
-					    _PATH_DEVNULL, strerror(errno));
-			}
-		}
-#else
-		if (mode == FORK_BG) {
-			ignoresig(SIGINT);
-			ignoresig(SIGQUIT);
-			if ((jp == NULL || jp->nprocs == 0) &&
-			    ! fd0_redirected_p ()) {
-				close(0);
-				if (open(_PATH_DEVNULL, O_RDONLY) != 0)
-					error("cannot open %s: %s",
-					    _PATH_DEVNULL, strerror(errno));
-			}
-		}
-#endif
-		INTOFF;
-		for (i = njobs, p = jobtab ; --i >= 0 ; p++)
-			if (p->used)
-				freejob(p);
-		INTON;
-		if (wasroot && iflag) {
-			setsignal(SIGINT);
-			setsignal(SIGQUIT);
-			setsignal(SIGTERM);
-		}
-		return pid;
-	}
-	if (rootshell && mode != FORK_NOJOB && mflag) {
-		if (jp == NULL || jp->nprocs == 0)
-			pgrp = pid;
-		else
-			pgrp = jp->ps[0].pid;
-		setpgid(pid, pgrp);
-	}
-	if (mode == FORK_BG) {
-		if (bgjob != NULL && bgjob->state == JOBDONE &&
-		    !bgjob->remembered && !iflag)
-			freejob(bgjob);
-		backgndpid = pid;		/* set $! */
-		bgjob = jp;
-	}
-	if (jp) {
-		struct procstat *ps = &jp->ps[jp->nprocs++];
-		ps->pid = pid;
-		ps->status = -1;
-		ps->cmd = nullstr;
-		if (iflag && rootshell && n)
-			ps->cmd = commandtext(n);
-		jp->foreground = mode == FORK_FG;
-#if JOBS
-		setcurjob(jp);
-#endif
-	}
-	INTON;
-	TRACE(("In parent shell:  child = %d\n", (int)pid));
-	return pid;
-}
-
-
-pid_t
-vforkexecshell(struct job *jp, char **argv, char **envp, const char *path, int idx, int pip[2])
-{
-	pid_t pid;
-	struct jmploc jmploc;
-	struct jmploc *savehandler;
-
-	TRACE(("vforkexecshell(%%%td, %s, %p) called\n", jp - jobtab, argv[0],
-	    (void *)pip));
-	INTOFF;
-	flushall();
-	savehandler = handler;
-	pid = vfork();
-	if (pid == -1) {
-		TRACE(("Vfork failed, errno=%d\n", errno));
-		INTON;
-		error("Cannot fork: %s", strerror(errno));
-	}
-	if (pid == 0) {
-		TRACE(("Child shell %d\n", (int)getpid()));
-		if (setjmp(jmploc.loc))
-			_exit(exception == EXEXEC ? exerrno : 2);
-		if (pip != NULL) {
-			close(pip[0]);
-			if (pip[1] != 1) {
-				dup2(pip[1], 1);
-				close(pip[1]);
-			}
-		}
-		handler = &jmploc;
-		shellexec(argv, envp, path, idx);
-	}
-	handler = savehandler;
-	if (jp) {
-		struct procstat *ps = &jp->ps[jp->nprocs++];
-		ps->pid = pid;
-		ps->status = -1;
-		ps->cmd = nullstr;
-		jp->foreground = 1;
-#if JOBS
-		setcurjob(jp);
-#endif
-	}
-	INTON;
-	TRACE(("In parent shell:  child = %d\n", (int)pid));
-	return pid;
-}
-
-
-/*
- * Wait for job to finish.
- *
- * Under job control we have the problem that while a child process is
- * running interrupts generated by the user are sent to the child but not
- * to the shell.  This means that an infinite loop started by an inter-
- * active user may be hard to kill.  With job control turned off, an
- * interactive user may place an interactive program inside a loop.  If
- * the interactive program catches interrupts, the user doesn't want
- * these interrupts to also abort the loop.  The approach we take here
- * is to have the shell ignore interrupt signals while waiting for a
- * foreground process to terminate, and then send itself an interrupt
- * signal if the child process was terminated by an interrupt signal.
- * Unfortunately, some programs want to do a bit of cleanup and then
- * exit on interrupt; unless these processes terminate themselves by
- * sending a signal to themselves (instead of calling exit) they will
- * confuse this approach.
- */
-
-int
-waitforjob(struct job *jp, int *signaled)
-{
-#if JOBS
-	int propagate_int = jp->jobctl && jp->foreground;
-#endif
-	int status;
-	int st;
-
-	INTOFF;
-	TRACE(("waitforjob(%%%td) called\n", jp - jobtab + 1));
-	while (jp->state == 0)
-		if (dowait(DOWAIT_BLOCK | (Tflag ? DOWAIT_SIG |
-		    DOWAIT_SIG_TRAP : 0), jp) == -1)
-			dotrap();
-#if JOBS
-	if (jp->jobctl) {
-		if (ttyfd >= 0 && tcsetpgrp(ttyfd, rootpid) < 0)
-			error("tcsetpgrp failed, errno=%d\n", errno);
-	}
-	if (jp->state == JOBSTOPPED)
-		setcurjob(jp);
-#endif
-	status = jp->ps[jp->nprocs - 1].status;
-	if (signaled != NULL)
-		*signaled = WIFSIGNALED(status);
-	/* convert to 8 bits */
-	if (WIFEXITED(status))
-		st = WEXITSTATUS(status);
-#if JOBS
-	else if (WIFSTOPPED(status))
-		st = WSTOPSIG(status) + 128;
-#endif
-	else
-		st = WTERMSIG(status) + 128;
-	if (! JOBS || jp->state == JOBDONE)
-		freejob(jp);
-	if (int_pending()) {
-		if (!WIFSIGNALED(status) || WTERMSIG(status) != SIGINT)
-			CLEAR_PENDING_INT;
-	}
-#if JOBS
-	else if (rootshell && propagate_int &&
-			WIFSIGNALED(status) && WTERMSIG(status) == SIGINT)
-		kill(getpid(), SIGINT);
-#endif
-	INTON;
-	return st;
-}
-
-
-static void
-dummy_handler(int sig __unused)
-{
-}
-
-/*
- * Wait for a process to terminate.
- */
-
-static pid_t
-dowait(int mode, struct job *job)
-{
-	struct sigaction sa, osa;
-	sigset_t mask, omask;
-	pid_t pid;
-	int status;
-	struct procstat *sp;
-	struct job *jp;
-	struct job *thisjob;
-	const char *sigstr;
-	int done;
-	int stopped;
-	int sig;
-	int coredump;
-	int wflags;
-	int restore_sigchld;
-
-	TRACE(("dowait(%d, %p) called\n", mode, job));
-	restore_sigchld = 0;
-	if ((mode & DOWAIT_SIG) != 0) {
-		sigfillset(&mask);
-		sigprocmask(SIG_BLOCK, &mask, &omask);
-		INTOFF;
-		if (!issigchldtrapped()) {
-			restore_sigchld = 1;
-			sa.sa_handler = dummy_handler;
-			sa.sa_flags = 0;
-			sigemptyset(&sa.sa_mask);
-			sigaction(SIGCHLD, &sa, &osa);
-		}
-	}
-	do {
-#if JOBS
-		if (iflag)
-			wflags = WUNTRACED | WCONTINUED;
-		else
-#endif
-			wflags = 0;
-		if ((mode & (DOWAIT_BLOCK | DOWAIT_SIG)) != DOWAIT_BLOCK)
-			wflags |= WNOHANG;
-		pid = wait3(&status, wflags, (struct rusage *)NULL);
-		TRACE(("wait returns %d, status=%d\n", (int)pid, status));
-		if (pid == 0 && (mode & DOWAIT_SIG) != 0) {
-			pid = -1;
-			if (((mode & DOWAIT_SIG_TRAP) != 0 ?
-			    pendingsig : pendingsig_waitcmd) != 0) {
-				errno = EINTR;
-				break;
-			}
-			sigsuspend(&omask);
-			if (int_pending())
-				break;
-		}
-	} while (pid == -1 && errno == EINTR);
-	if (pid == -1 && errno == ECHILD && job != NULL)
-		job->state = JOBDONE;
-	if ((mode & DOWAIT_SIG) != 0) {
-		if (restore_sigchld)
-			sigaction(SIGCHLD, &osa, NULL);
-		sigprocmask(SIG_SETMASK, &omask, NULL);
-		INTON;
-	}
-	if (pid <= 0)
-		return pid;
-	INTOFF;
-	thisjob = NULL;
-	for (jp = jobtab ; jp < jobtab + njobs ; jp++) {
-		if (jp->used && jp->nprocs > 0) {
-			done = 1;
-			stopped = 1;
-			for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) {
-				if (sp->pid == -1)
-					continue;
-				if (sp->pid == pid && (sp->status == -1 ||
-				    WIFSTOPPED(sp->status))) {
-					TRACE(("Changing status of proc %d from 0x%x to 0x%x\n",
-						   (int)pid, sp->status,
-						   status));
-					if (WIFCONTINUED(status)) {
-						sp->status = -1;
-						jp->state = 0;
-					} else
-						sp->status = status;
-					thisjob = jp;
-				}
-				if (sp->status == -1)
-					stopped = 0;
-				else if (WIFSTOPPED(sp->status))
-					done = 0;
-			}
-			if (stopped) {		/* stopped or done */
-				int state = done? JOBDONE : JOBSTOPPED;
-				if (jp->state != state) {
-					TRACE(("Job %td: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state));
-					jp->state = state;
-					if (jp != job) {
-						if (done && !jp->remembered &&
-						    !iflag && jp != bgjob)
-							freejob(jp);
-#if JOBS
-						else if (done)
-							deljob(jp);
-#endif
-					}
-				}
-			}
-		}
-	}
-	INTON;
-	if (!thisjob || thisjob->state == 0)
-		;
-	else if ((!rootshell || !iflag || thisjob == job) &&
-	    thisjob->foreground && thisjob->state != JOBSTOPPED) {
-		sig = 0;
-		coredump = 0;
-		for (sp = thisjob->ps; sp < thisjob->ps + thisjob->nprocs; sp++)
-			if (WIFSIGNALED(sp->status)) {
-				sig = WTERMSIG(sp->status);
-				coredump = WCOREDUMP(sp->status);
-			}
-		if (sig > 0 && sig != SIGINT && sig != SIGPIPE) {
-			sigstr = strsignal(sig);
-			if (sigstr != NULL)
-				out2str(sigstr);
-			else
-				out2str("Unknown signal");
-			if (coredump)
-				out2str(" (core dumped)");
-			out2c('\n');
-			flushout(out2);
-		}
-	} else {
-		TRACE(("Not printing status, rootshell=%d, job=%p\n", rootshell, job));
-		thisjob->changed = 1;
-	}
-	return pid;
-}
-
-
-
-/*
- * return 1 if there are stopped jobs, otherwise 0
- */
-int job_warning = 0;
-int
-stoppedjobs(void)
-{
-	int jobno;
-	struct job *jp;
-
-	if (job_warning)
-		return (0);
-	for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) {
-		if (jp->used == 0)
-			continue;
-		if (jp->state == JOBSTOPPED) {
-			out2fmt_flush("You have stopped jobs.\n");
-			job_warning = 2;
-			return (1);
-		}
-	}
-
-	return (0);
-}
-
-
-static void
-checkzombies(void)
-{
-	while (njobs > 0 && dowait(0, NULL) > 0)
-		;
-}
-
-
-int
-backgndpidset(void)
-{
-	return backgndpid != -1;
-}
-
-
-pid_t
-backgndpidval(void)
-{
-	if (bgjob != NULL && !forcelocal)
-		bgjob->remembered = 1;
-	return backgndpid;
-}
-
-/*
- * Return a string identifying a command (to be printed by the
- * jobs command.
- */
-
-static char *cmdnextc;
-static int cmdnleft;
-#define MAXCMDTEXT	200
-
-char *
-commandtext(union node *n)
-{
-	char *name;
-
-	cmdnextc = name = ckmalloc(MAXCMDTEXT);
-	cmdnleft = MAXCMDTEXT - 4;
-	cmdtxt(n);
-	*cmdnextc = '\0';
-	return name;
-}
-
-
-static void
-cmdtxtdogroup(union node *n)
-{
-	cmdputs("; do ");
-	cmdtxt(n);
-	cmdputs("; done");
-}
-
-
-static void
-cmdtxtredir(union node *n, const char *op, int deffd)
-{
-	char s[2];
-
-	if (n->nfile.fd != deffd) {
-		s[0] = n->nfile.fd + '0';
-		s[1] = '\0';
-		cmdputs(s);
-	}
-	cmdputs(op);
-	if (n->type == NTOFD || n->type == NFROMFD) {
-		if (n->ndup.dupfd >= 0)
-			s[0] = n->ndup.dupfd + '0';
-		else
-			s[0] = '-';
-		s[1] = '\0';
-		cmdputs(s);
-	} else {
-		cmdtxt(n->nfile.fname);
-	}
-}
-
-
-static void
-cmdtxt(union node *n)
-{
-	union node *np;
-	struct nodelist *lp;
-
-	if (n == NULL)
-		return;
-	switch (n->type) {
-	case NSEMI:
-		cmdtxt(n->nbinary.ch1);
-		cmdputs("; ");
-		cmdtxt(n->nbinary.ch2);
-		break;
-	case NAND:
-		cmdtxt(n->nbinary.ch1);
-		cmdputs(" && ");
-		cmdtxt(n->nbinary.ch2);
-		break;
-	case NOR:
-		cmdtxt(n->nbinary.ch1);
-		cmdputs(" || ");
-		cmdtxt(n->nbinary.ch2);
-		break;
-	case NPIPE:
-		for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
-			cmdtxt(lp->n);
-			if (lp->next)
-				cmdputs(" | ");
-		}
-		break;
-	case NSUBSHELL:
-		cmdputs("(");
-		cmdtxt(n->nredir.n);
-		cmdputs(")");
-		break;
-	case NREDIR:
-	case NBACKGND:
-		cmdtxt(n->nredir.n);
-		break;
-	case NIF:
-		cmdputs("if ");
-		cmdtxt(n->nif.test);
-		cmdputs("; then ");
-		cmdtxt(n->nif.ifpart);
-		cmdputs("...");
-		break;
-	case NWHILE:
-		cmdputs("while ");
-		cmdtxt(n->nbinary.ch1);
-		cmdtxtdogroup(n->nbinary.ch2);
-		break;
-	case NUNTIL:
-		cmdputs("until ");
-		cmdtxt(n->nbinary.ch1);
-		cmdtxtdogroup(n->nbinary.ch2);
-		break;
-	case NFOR:
-		cmdputs("for ");
-		cmdputs(n->nfor.var);
-		cmdputs(" in ...");
-		break;
-	case NCASE:
-		cmdputs("case ");
-		cmdputs(n->ncase.expr->narg.text);
-		cmdputs(" in ...");
-		break;
-	case NDEFUN:
-		cmdputs(n->narg.text);
-		cmdputs("() ...");
-		break;
-	case NNOT:
-		cmdputs("! ");
-		cmdtxt(n->nnot.com);
-		break;
-	case NCMD:
-		for (np = n->ncmd.args ; np ; np = np->narg.next) {
-			cmdtxt(np);
-			if (np->narg.next)
-				cmdputs(" ");
-		}
-		for (np = n->ncmd.redirect ; np ; np = np->nfile.next) {
-			cmdputs(" ");
-			cmdtxt(np);
-		}
-		break;
-	case NARG:
-		cmdputs(n->narg.text);
-		break;
-	case NTO:
-		cmdtxtredir(n, ">", 1);
-		break;
-	case NAPPEND:
-		cmdtxtredir(n, ">>", 1);
-		break;
-	case NTOFD:
-		cmdtxtredir(n, ">&", 1);
-		break;
-	case NCLOBBER:
-		cmdtxtredir(n, ">|", 1);
-		break;
-	case NFROM:
-		cmdtxtredir(n, "<", 0);
-		break;
-	case NFROMTO:
-		cmdtxtredir(n, "<>", 0);
-		break;
-	case NFROMFD:
-		cmdtxtredir(n, "<&", 0);
-		break;
-	case NHERE:
-	case NXHERE:
-		cmdputs("<<...");
-		break;
-	default:
-		cmdputs("???");
-		break;
-	}
-}
-
-
-
-static void
-cmdputs(const char *s)
-{
-	const char *p;
-	char *q;
-	char c;
-	int subtype = 0;
-
-	if (cmdnleft <= 0)
-		return;
-	p = s;
-	q = cmdnextc;
-	while ((c = *p++) != '\0') {
-		if (c == CTLESC)
-			*q++ = *p++;
-		else if (c == CTLVAR) {
-			*q++ = '$';
-			if (--cmdnleft > 0)
-				*q++ = '{';
-			subtype = *p++;
-			if ((subtype & VSTYPE) == VSLENGTH && --cmdnleft > 0)
-				*q++ = '#';
-		} else if (c == '=' && subtype != 0) {
-			*q = "}-+?=##%%\0X"[(subtype & VSTYPE) - VSNORMAL];
-			if (*q)
-				q++;
-			else
-				cmdnleft++;
-			if (((subtype & VSTYPE) == VSTRIMLEFTMAX ||
-			    (subtype & VSTYPE) == VSTRIMRIGHTMAX) &&
-			    --cmdnleft > 0)
-				*q = q[-1], q++;
-			subtype = 0;
-		} else if (c == CTLENDVAR) {
-			*q++ = '}';
-		} else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE) {
-			cmdnleft -= 5;
-			if (cmdnleft > 0) {
-				*q++ = '$';
-				*q++ = '(';
-				*q++ = '.';
-				*q++ = '.';
-				*q++ = '.';
-				*q++ = ')';
-			}
-		} else if (c == CTLARI) {
-			cmdnleft -= 2;
-			if (cmdnleft > 0) {
-				*q++ = '$';
-				*q++ = '(';
-				*q++ = '(';
-			}
-			p++;
-		} else if (c == CTLENDARI) {
-			if (--cmdnleft > 0) {
-				*q++ = ')';
-				*q++ = ')';
-			}
-		} else if (c == CTLQUOTEMARK || c == CTLQUOTEEND)
-			cmdnleft++; /* ignore */
-		else
-			*q++ = c;
-		if (--cmdnleft <= 0) {
-			*q++ = '.';
-			*q++ = '.';
-			*q++ = '.';
-			break;
-		}
-	}
-	cmdnextc = q;
-}
diff --git a/bin/1sh/jobs.h b/bin/1sh/jobs.h
deleted file mode 100644
index 52c3abe1..00000000
--- a/bin/1sh/jobs.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)jobs.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/jobs.h 327475 2018-01-01 22:31:52Z jilles $
- */
-
-/* Mode argument to forkshell.  Don't change FORK_FG or FORK_BG. */
-#define FORK_FG 0
-#define FORK_BG 1
-#define FORK_NOJOB 2
-
-#include <signal.h>		/* for sig_atomic_t */
-
-struct job;
-
-enum {
-	SHOWJOBS_DEFAULT,	/* job number, status, command */
-	SHOWJOBS_VERBOSE,	/* job number, PID, status, command */
-	SHOWJOBS_PIDS,		/* PID only */
-	SHOWJOBS_PGIDS		/* PID of the group leader only */
-};
-
-extern int job_warning;		/* user was warned about stopped jobs */
-
-void setjobctl(int);
-void showjobs(int, int);
-struct job *makejob(union node *, int);
-pid_t forkshell(struct job *, union node *, int);
-pid_t vforkexecshell(struct job *, char **, char **, const char *, int, int []);
-int waitforjob(struct job *, int *);
-int stoppedjobs(void);
-int backgndpidset(void);
-pid_t backgndpidval(void);
-char *commandtext(union node *);
-
-#if ! JOBS
-#define setjobctl(on)	/* do nothing */
-#endif
diff --git a/bin/1sh/kill.c b/bin/1sh/kill.c
deleted file mode 100644
index f58987cc..00000000
--- a/bin/1sh/kill.c
+++ /dev/null
@@ -1,215 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1988, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-/*
- * Important: This file is used both as a standalone program /bin/kill and
- * as a builtin for /bin/sh (#define SHELL).
- */
-
-#if 0
-#ifndef lint
-static char const copyright[] =
-"@(#) Copyright (c) 1988, 1993, 1994\n\
-	The Regents of the University of California.  All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-static char sccsid[] = "@(#)kill.c	8.4 (Berkeley) 4/28/95";
-#endif /* not lint */
-#endif
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/kill/kill.c 326025 2017-11-20 19:49:47Z pfg $");
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifdef SHELL
-#define main killcmd
-#include "bltin.h"
-#endif
-
-static void nosig(const char *);
-static void printsignals(FILE *);
-static int signame_to_signum(const char *);
-static void usage(void);
-
-int
-main(int argc, char *argv[])
-{
-	long pidl;
-	pid_t pid;
-	int errors, numsig, ret;
-	char *ep;
-
-	if (argc < 2)
-		usage();
-
-	numsig = SIGTERM;
-
-	argc--, argv++;
-	if (!strcmp(*argv, "-l")) {
-		argc--, argv++;
-		if (argc > 1)
-			usage();
-		if (argc == 1) {
-			if (!isdigit(**argv))
-				usage();
-			numsig = strtol(*argv, &ep, 10);
-			if (!**argv || *ep)
-				errx(2, "illegal signal number: %s", *argv);
-			if (numsig >= 128)
-				numsig -= 128;
-			if (numsig <= 0 || numsig >= NSIG)
-				nosig(*argv);
-			printf("%s\n", sys_signame[numsig]);
-			return (0);
-		}
-		printsignals(stdout);
-		return (0);
-	}
-
-	if (!strcmp(*argv, "-s")) {
-		argc--, argv++;
-		if (argc < 1) {
-			warnx("option requires an argument -- s");
-			usage();
-		}
-		if (strcmp(*argv, "0")) {
-			if ((numsig = signame_to_signum(*argv)) < 0)
-				nosig(*argv);
-		} else
-			numsig = 0;
-		argc--, argv++;
-	} else if (**argv == '-' && *(*argv + 1) != '-') {
-		++*argv;
-		if (isalpha(**argv)) {
-			if ((numsig = signame_to_signum(*argv)) < 0)
-				nosig(*argv);
-		} else if (isdigit(**argv)) {
-			numsig = strtol(*argv, &ep, 10);
-			if (!**argv || *ep)
-				errx(2, "illegal signal number: %s", *argv);
-			if (numsig < 0)
-				nosig(*argv);
-		} else
-			nosig(*argv);
-		argc--, argv++;
-	}
-
-	if (argc > 0 && strncmp(*argv, "--", 2) == 0)
-		argc--, argv++;
-
-	if (argc == 0)
-		usage();
-
-	for (errors = 0; argc; argc--, argv++) {
-#ifdef SHELL
-		if (**argv == '%')
-			ret = killjob(*argv, numsig);
-		else
-#endif
-		{
-			pidl = strtol(*argv, &ep, 10);
-			/* Check for overflow of pid_t. */
-			pid = (pid_t)pidl;
-			if (!**argv || *ep || pid != pidl)
-				errx(2, "illegal process id: %s", *argv);
-			ret = kill(pid, numsig);
-		}
-		if (ret == -1) {
-			warn("%s", *argv);
-			errors = 1;
-		}
-	}
-
-	return (errors);
-}
-
-static int
-signame_to_signum(const char *sig)
-{
-	int n;
-
-	if (strncasecmp(sig, "SIG", 3) == 0)
-		sig += 3;
-	for (n = 1; n < NSIG; n++) {
-		if (!strcasecmp(sys_signame[n], sig))
-			return (n);
-	}
-	return (-1);
-}
-
-static void
-nosig(const char *name)
-{
-
-	warnx("unknown signal %s; valid signals:", name);
-	printsignals(stderr);
-#ifdef SHELL
-	error(NULL);
-#else
-	exit(2);
-#endif
-}
-
-static void
-printsignals(FILE *fp)
-{
-	int n;
-
-	for (n = 1; n < NSIG; n++) {
-		(void)fprintf(fp, "%s", sys_signame[n]);
-		if (n == (NSIG / 2) || n == (NSIG - 1))
-			(void)fprintf(fp, "\n");
-		else
-			(void)fprintf(fp, " ");
-	}
-}
-
-static void
-usage(void)
-{
-
-	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
-		"usage: kill [-s signal_name] pid ...",
-		"       kill -l [exit_status]",
-		"       kill -signal_name pid ...",
-		"       kill -signal_number pid ...");
-#ifdef SHELL
-	error(NULL);
-#else
-	exit(2);
-#endif
-}
diff --git a/bin/1sh/mail.c b/bin/1sh/mail.c
deleted file mode 100644
index 6f8a3d39..00000000
--- a/bin/1sh/mail.c
+++ /dev/null
@@ -1,120 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)mail.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/mail.c 336303 2018-07-15 09:14:30Z jilles $");
-
-/*
- * Routines to check for mail.  (Perhaps make part of main.c?)
- */
-
-#include "shell.h"
-#include "mail.h"
-#include "var.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <stdlib.h>
-
-
-#define MAXMBOXES 10
-
-
-static int nmboxes;			/* number of mailboxes */
-static time_t mailtime[MAXMBOXES];	/* times of mailboxes */
-
-
-
-/*
- * Print appropriate message(s) if mail has arrived.  If the argument is
- * nozero, then the value of MAIL has changed, so we just update the
- * values.
- */
-
-void
-chkmail(int silent)
-{
-	int i;
-	char *mpath;
-	char *p;
-	char *msg;
-	struct stackmark smark;
-	struct stat statb;
-
-	if (silent)
-		nmboxes = 10;
-	if (nmboxes == 0)
-		return;
-	setstackmark(&smark);
-	mpath = stsavestr(mpathset()? mpathval() : mailval());
-	for (i = 0 ; i < nmboxes ; i++) {
-		p = mpath;
-		if (*p == '\0')
-			break;
-		mpath = strchr(p, ':');
-		if (!mpath) mpath = strchr(p, '\0');
-		if (*mpath != '\0') {
-			*mpath++ = '\0';
-			if (p == mpath - 1)
-				continue;
-		}
-		msg = strchr(p, '%');
-		if (msg != NULL)
-			*msg++ = '\0';
-#ifdef notdef /* this is what the System V shell claims to do (it lies) */
-		if (stat(p, &statb) < 0)
-			statb.st_mtime = 0;
-		if (statb.st_mtime > mailtime[i] && ! silent) {
-			out2str(msg? msg : "you have mail");
-			out2c('\n');
-		}
-		mailtime[i] = statb.st_mtime;
-#else /* this is what it should do */
-		if (stat(p, &statb) < 0)
-			statb.st_size = 0;
-		if (statb.st_size > mailtime[i] && ! silent) {
-			out2str(msg? msg : "you have mail");
-			out2c('\n');
-		}
-		mailtime[i] = statb.st_size;
-#endif
-	}
-	nmboxes = i;
-	popstackmark(&smark);
-}
diff --git a/bin/1sh/mail.h b/bin/1sh/mail.h
deleted file mode 100644
index adeced2d..00000000
--- a/bin/1sh/mail.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)mail.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/mail.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-void chkmail(int);
diff --git a/bin/1sh/main.c b/bin/1sh/main.c
deleted file mode 100644
index 7a0bf25b..00000000
--- a/bin/1sh/main.c
+++ /dev/null
@@ -1,350 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/28/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/main.c 336320 2018-07-15 21:55:17Z jilles $");
-
-#include <stdio.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <locale.h>
-#include <errno.h>
-
-#include "shell.h"
-#include "main.h"
-#include "mail.h"
-#include "options.h"
-#include "output.h"
-#include "parser.h"
-#include "nodes.h"
-#include "expand.h"
-#include "eval.h"
-#include "jobs.h"
-#include "input.h"
-#include "trap.h"
-#include "var.h"
-#include "show.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "exec.h"
-#include "cd.h"
-#include "redir.h"
-#include "builtins.h"
-
-int rootpid;
-int rootshell;
-struct jmploc main_handler;
-int localeisutf8, initial_localeisutf8;
-
-static void reset(void);
-static void cmdloop(int);
-static void read_profile(const char *);
-static char *find_dot_file(char *);
-
-/*
- * Main routine.  We initialize things, parse the arguments, execute
- * profiles if we're a login shell, and then call cmdloop to execute
- * commands.  The setjmp call sets up the location to jump to when an
- * exception occurs.  When an exception occurs the variable "state"
- * is used to figure out how far we had gotten.
- */
-
-int
-main(int argc, char *argv[])
-{
-	struct stackmark smark, smark2;
-	volatile int state;
-	char *shinit;
-
-	(void) setlocale(LC_ALL, "");
-	initcharset();
-	state = 0;
-	if (setjmp(main_handler.loc)) {
-		switch (exception) {
-		case EXEXEC:
-			exitstatus = exerrno;
-			break;
-
-		case EXERROR:
-			exitstatus = 2;
-			break;
-
-		default:
-			break;
-		}
-
-		if (state == 0 || iflag == 0 || ! rootshell ||
-		    exception == EXEXIT)
-			exitshell(exitstatus);
-		reset();
-		if (exception == EXINT)
-			out2fmt_flush("\n");
-		popstackmark(&smark);
-		FORCEINTON;				/* enable interrupts */
-		if (state == 1)
-			goto state1;
-		else if (state == 2)
-			goto state2;
-		else if (state == 3)
-			goto state3;
-		else
-			goto state4;
-	}
-	handler = &main_handler;
-#ifdef DEBUG
-	opentrace();
-	trputs("Shell args:  ");  trargs(argv);
-#endif
-	rootpid = getpid();
-	rootshell = 1;
-	INTOFF;
-	initvar();
-	setstackmark(&smark);
-	setstackmark(&smark2);
-	procargs(argc, argv);
-	pwd_init(iflag);
-	INTON;
-	if (iflag)
-		chkmail(1);
-	if (argv[0] && argv[0][0] == '-') {
-		state = 1;
-		read_profile("/etc/profile");
-state1:
-		state = 2;
-		if (privileged == 0)
-			read_profile("${HOME-}/.profile");
-		else
-			read_profile("/etc/suid_profile");
-	}
-state2:
-	state = 3;
-	if (!privileged && iflag) {
-		if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
-			state = 3;
-			read_profile(shinit);
-		}
-	}
-state3:
-	state = 4;
-	popstackmark(&smark2);
-	if (minusc) {
-		evalstring(minusc, sflag ? 0 : EV_EXIT);
-	}
-state4:
-	if (sflag || minusc == NULL) {
-		cmdloop(1);
-	}
-	iflag = 0;
-	optschanged();
-	exitshell(exitstatus);
-	/*NOTREACHED*/
-	return 0;
-}
-
-static void
-reset(void)
-{
-	reseteval();
-	resetinput();
-}
-
-/*
- * Read and execute commands.  "Top" is nonzero for the top level command
- * loop; it turns on prompting if the shell is interactive.
- */
-
-static void
-cmdloop(int top)
-{
-	union node *n;
-	struct stackmark smark;
-	int inter;
-	int numeof = 0;
-
-	TRACE(("cmdloop(%d) called\n", top));
-	setstackmark(&smark);
-	for (;;) {
-		if (pendingsig)
-			dotrap();
-		inter = 0;
-		if (iflag && top) {
-			inter++;
-			showjobs(1, SHOWJOBS_DEFAULT);
-			chkmail(0);
-			flushout(&output);
-		}
-		n = parsecmd(inter);
-		/* showtree(n); DEBUG */
-		if (n == NEOF) {
-			if (!top || numeof >= 50)
-				break;
-			if (!stoppedjobs()) {
-				if (!Iflag)
-					break;
-				out2fmt_flush("\nUse \"exit\" to leave shell.\n");
-			}
-			numeof++;
-		} else if (n != NULL && nflag == 0) {
-			job_warning = (job_warning == 2) ? 1 : 0;
-			numeof = 0;
-			evaltree(n, 0);
-		}
-		popstackmark(&smark);
-		setstackmark(&smark);
-		if (evalskip != 0) {
-			if (evalskip == SKIPRETURN)
-				evalskip = 0;
-			break;
-		}
-	}
-	popstackmark(&smark);
-}
-
-
-
-/*
- * Read /etc/profile or .profile.  Return on error.
- */
-
-static void
-read_profile(const char *name)
-{
-	int fd;
-	const char *expandedname;
-
-	expandedname = expandstr(name);
-	if (expandedname == NULL)
-		return;
-	INTOFF;
-	if ((fd = open(expandedname, O_RDONLY | O_CLOEXEC)) >= 0)
-		setinputfd(fd, 1);
-	INTON;
-	if (fd < 0)
-		return;
-	cmdloop(0);
-	popfile();
-}
-
-
-
-/*
- * Read a file containing shell functions.
- */
-
-void
-readcmdfile(const char *name)
-{
-	setinputfile(name, 1);
-	cmdloop(0);
-	popfile();
-}
-
-
-
-/*
- * Take commands from a file.  To be compatible we should do a path
- * search for the file, which is necessary to find sub-commands.
- */
-
-
-static char *
-find_dot_file(char *basename)
-{
-	char *fullname;
-	const char *opt;
-	const char *path = pathval();
-	struct stat statb;
-
-	/* don't try this for absolute or relative paths */
-	if( strchr(basename, '/'))
-		return basename;
-
-	while ((fullname = padvance(&path, &opt, basename)) != NULL) {
-		if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
-			/*
-			 * Don't bother freeing here, since it will
-			 * be freed by the caller.
-			 */
-			return fullname;
-		}
-		stunalloc(fullname);
-	}
-	return basename;
-}
-
-int
-dotcmd(int argc, char **argv)
-{
-	char *filename, *fullname;
-
-	if (argc < 2)
-		error("missing filename");
-
-	exitstatus = 0;
-
-	/*
-	 * Because we have historically not supported any options,
-	 * only treat "--" specially.
-	 */
-	filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1];
-
-	fullname = find_dot_file(filename);
-	setinputfile(fullname, 1);
-	commandname = fullname;
-	cmdloop(0);
-	popfile();
-	return exitstatus;
-}
-
-
-int
-exitcmd(int argc, char **argv)
-{
-	if (stoppedjobs())
-		return 0;
-	iflag = 0;
-	optschanged();
-	if (argc > 1)
-		exitshell(number(argv[1]));
-	else
-		exitshell_savedstatus();
-}
diff --git a/bin/1sh/main.h b/bin/1sh/main.h
deleted file mode 100644
index f37fd99e..00000000
--- a/bin/1sh/main.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)main.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/main.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-extern int rootpid;	/* pid of main shell */
-extern int rootshell;	/* true if we aren't a child of the main shell */
-extern struct jmploc main_handler;	/* top level exception handler */
-
-void readcmdfile(const char *);
diff --git a/bin/1sh/memalloc.c b/bin/1sh/memalloc.c
deleted file mode 100644
index e43ce4cd..00000000
--- a/bin/1sh/memalloc.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)memalloc.c	8.3 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/memalloc.c 326025 2017-11-20 19:49:47Z pfg $");
-
-#include <sys/param.h>
-#include "shell.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "expand.h"
-#include <stdlib.h>
-#include <unistd.h>
-
-/*
- * Like malloc, but returns an error when out of space.
- */
-
-pointer
-ckmalloc(size_t nbytes)
-{
-	pointer p;
-
-	INTOFF;
-	p = malloc(nbytes);
-	INTON;
-	if (p == NULL)
-		error("Out of space");
-	return p;
-}
-
-
-/*
- * Same for realloc.
- */
-
-pointer
-ckrealloc(pointer p, int nbytes)
-{
-	INTOFF;
-	p = realloc(p, nbytes);
-	INTON;
-	if (p == NULL)
-		error("Out of space");
-	return p;
-}
-
-void
-ckfree(pointer p)
-{
-	INTOFF;
-	free(p);
-	INTON;
-}
-
-
-/*
- * Make a copy of a string in safe storage.
- */
-
-char *
-savestr(const char *s)
-{
-	char *p;
-	size_t len;
-
-	len = strlen(s);
-	p = ckmalloc(len + 1);
-	memcpy(p, s, len + 1);
-	return p;
-}
-
-
-/*
- * Parse trees for commands are allocated in lifo order, so we use a stack
- * to make this more efficient, and also to avoid all sorts of exception
- * handling code to handle interrupts in the middle of a parse.
- *
- * The size 496 was chosen because with 16-byte alignment the total size
- * for the allocated block is 512.
- */
-
-#define MINSIZE 496		/* minimum size of a block. */
-
-
-struct stack_block {
-	struct stack_block *prev;
-	/* Data follows */
-};
-#define SPACE(sp)	((char*)(sp) + ALIGN(sizeof(struct stack_block)))
-
-static struct stack_block *stackp;
-char *stacknxt;
-int stacknleft;
-char *sstrend;
-
-
-static void
-stnewblock(int nbytes)
-{
-	struct stack_block *sp;
-	int allocsize;
-
-	if (nbytes < MINSIZE)
-		nbytes = MINSIZE;
-
-	allocsize = ALIGN(sizeof(struct stack_block)) + ALIGN(nbytes);
-
-	INTOFF;
-	sp = ckmalloc(allocsize);
-	sp->prev = stackp;
-	stacknxt = SPACE(sp);
-	stacknleft = allocsize - (stacknxt - (char*)sp);
-	sstrend = stacknxt + stacknleft;
-	stackp = sp;
-	INTON;
-}
-
-
-pointer
-stalloc(int nbytes)
-{
-	char *p;
-
-	nbytes = ALIGN(nbytes);
-	if (nbytes > stacknleft)
-		stnewblock(nbytes);
-	p = stacknxt;
-	stacknxt += nbytes;
-	stacknleft -= nbytes;
-	return p;
-}
-
-
-void
-stunalloc(pointer p)
-{
-	if (p == NULL) {		/*DEBUG */
-		write(STDERR_FILENO, "stunalloc\n", 10);
-		abort();
-	}
-	stacknleft += stacknxt - (char *)p;
-	stacknxt = p;
-}
-
-
-char *
-stsavestr(const char *s)
-{
-	char *p;
-	size_t len;
-
-	len = strlen(s);
-	p = stalloc(len + 1);
-	memcpy(p, s, len + 1);
-	return p;
-}
-
-
-void
-setstackmark(struct stackmark *mark)
-{
-	mark->stackp = stackp;
-	mark->stacknxt = stacknxt;
-	mark->stacknleft = stacknleft;
-	/* Ensure this block stays in place. */
-	if (stackp != NULL && stacknxt == SPACE(stackp))
-		stalloc(1);
-}
-
-
-void
-popstackmark(struct stackmark *mark)
-{
-	struct stack_block *sp;
-
-	INTOFF;
-	while (stackp != mark->stackp) {
-		sp = stackp;
-		stackp = sp->prev;
-		ckfree(sp);
-	}
-	stacknxt = mark->stacknxt;
-	stacknleft = mark->stacknleft;
-	sstrend = stacknxt + stacknleft;
-	INTON;
-}
-
-
-/*
- * When the parser reads in a string, it wants to stick the string on the
- * stack and only adjust the stack pointer when it knows how big the
- * string is.  Stackblock (defined in stack.h) returns a pointer to a block
- * of space on top of the stack and stackblocklen returns the length of
- * this block.  Growstackblock will grow this space by at least one byte,
- * possibly moving it (like realloc).  Grabstackblock actually allocates the
- * part of the block that has been used.
- */
-
-static void
-growstackblock(int min)
-{
-	char *p;
-	int newlen;
-	char *oldspace;
-	int oldlen;
-	struct stack_block *sp;
-	struct stack_block *oldstackp;
-
-	if (min < stacknleft)
-		min = stacknleft;
-	if ((unsigned int)min >=
-	    INT_MAX / 2 - ALIGN(sizeof(struct stack_block)))
-		error("Out of space");
-	min += stacknleft;
-	min += ALIGN(sizeof(struct stack_block));
-	newlen = 512;
-	while (newlen < min)
-		newlen <<= 1;
-	oldspace = stacknxt;
-	oldlen = stacknleft;
-
-	if (stackp != NULL && stacknxt == SPACE(stackp)) {
-		INTOFF;
-		oldstackp = stackp;
-		stackp = oldstackp->prev;
-		sp = ckrealloc((pointer)oldstackp, newlen);
-		sp->prev = stackp;
-		stackp = sp;
-		stacknxt = SPACE(sp);
-		stacknleft = newlen - (stacknxt - (char*)sp);
-		sstrend = stacknxt + stacknleft;
-		INTON;
-	} else {
-		newlen -= ALIGN(sizeof(struct stack_block));
-		p = stalloc(newlen);
-		if (oldlen != 0)
-			memcpy(p, oldspace, oldlen);
-		stunalloc(p);
-	}
-}
-
-
-
-/*
- * The following routines are somewhat easier to use that the above.
- * The user declares a variable of type STACKSTR, which may be declared
- * to be a register.  The macro STARTSTACKSTR initializes things.  Then
- * the user uses the macro STPUTC to add characters to the string.  In
- * effect, STPUTC(c, p) is the same as *p++ = c except that the stack is
- * grown as necessary.  When the user is done, she can just leave the
- * string there and refer to it using stackblock().  Or she can allocate
- * the space for it using grabstackstr().  If it is necessary to allow
- * someone else to use the stack temporarily and then continue to grow
- * the string, the user should use grabstack to allocate the space, and
- * then call ungrabstr(p) to return to the previous mode of operation.
- *
- * USTPUTC is like STPUTC except that it doesn't check for overflow.
- * CHECKSTACKSPACE can be called before USTPUTC to ensure that there
- * is space for at least one character.
- */
-
-static char *
-growstrstackblock(int n, int min)
-{
-	growstackblock(min);
-	return stackblock() + n;
-}
-
-char *
-growstackstr(void)
-{
-	int len;
-
-	len = stackblocksize();
-	return (growstrstackblock(len, 0));
-}
-
-
-/*
- * Called from CHECKSTRSPACE.
- */
-
-char *
-makestrspace(int min, char *p)
-{
-	int len;
-
-	len = p - stackblock();
-	return (growstrstackblock(len, min));
-}
-
-
-char *
-stputbin(const char *data, size_t len, char *p)
-{
-	CHECKSTRSPACE(len, p);
-	memcpy(p, data, len);
-	return (p + len);
-}
-
-char *
-stputs(const char *data, char *p)
-{
-	return (stputbin(data, strlen(data), p));
-}
diff --git a/bin/1sh/memalloc.h b/bin/1sh/memalloc.h
deleted file mode 100644
index 216275d8..00000000
--- a/bin/1sh/memalloc.h
+++ /dev/null
@@ -1,88 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)memalloc.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/memalloc.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-#include <string.h>
-
-struct stackmark {
-	struct stack_block *stackp;
-	char *stacknxt;
-	int stacknleft;
-};
-
-
-extern char *stacknxt;
-extern int stacknleft;
-extern char *sstrend;
-
-pointer ckmalloc(size_t);
-pointer ckrealloc(pointer, int);
-void ckfree(pointer);
-char *savestr(const char *);
-pointer stalloc(int);
-void stunalloc(pointer);
-char *stsavestr(const char *);
-void setstackmark(struct stackmark *);
-void popstackmark(struct stackmark *);
-char *growstackstr(void);
-char *makestrspace(int, char *);
-char *stputbin(const char *data, size_t len, char *p);
-char *stputs(const char *data, char *p);
-
-
-
-#define stackblock() stacknxt
-#define stackblocksize() stacknleft
-#define grabstackblock(n) stalloc(n)
-#define STARTSTACKSTR(p)	p = stackblock()
-#define STPUTC(c, p)	do { if (p == sstrend) p = growstackstr(); *p++ = (c); } while(0)
-#define CHECKSTRSPACE(n, p)	{ if ((size_t)(sstrend - p) < n) p = makestrspace(n, p); }
-#define USTPUTC(c, p)	(*p++ = (c))
-/*
- * STACKSTRNUL's use is where we want to be able to turn a stack
- * (non-sentinel, character counting string) into a C string,
- * and later pretend the NUL is not there.
- * Note: Because of STACKSTRNUL's semantics, STACKSTRNUL cannot be used
- * on a stack that will grabstackstr()ed.
- */
-#define STACKSTRNUL(p)	(p == sstrend ? (p = growstackstr(), *p = '\0') : (*p = '\0'))
-#define STUNPUTC(p)	(--p)
-#define STTOPC(p)	p[-1]
-#define STADJUST(amount, p)	(p += (amount))
-#define grabstackstr(p)	stalloc((char *)p - stackblock())
-#define ungrabstackstr(s, p)	stunalloc((s))
-#define STPUTBIN(s, len, p)	p = stputbin((s), (len), p)
-#define STPUTS(s, p)	p = stputs((s), p)
diff --git a/bin/1sh/miscbltin.c b/bin/1sh/miscbltin.c
deleted file mode 100644
index 7f0c42e7..00000000
--- a/bin/1sh/miscbltin.c
+++ /dev/null
@@ -1,534 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)miscbltin.c	8.4 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/miscbltin.c 326025 2017-11-20 19:49:47Z pfg $");
-
-/*
- * Miscellaneous builtins.
- */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <unistd.h>
-#include <errno.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#include "options.h"
-#include "var.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "syntax.h"
-#include "trap.h"
-
-#undef eflag
-
-int readcmd(int, char **);
-int umaskcmd(int, char **);
-int ulimitcmd(int, char **);
-
-/*
- * The read builtin.  The -r option causes backslashes to be treated like
- * ordinary characters.
- *
- * This uses unbuffered input, which may be avoidable in some cases.
- *
- * Note that if IFS=' :' then read x y should work so that:
- * 'a b'	x='a', y='b'
- * ' a b '	x='a', y='b'
- * ':b'		x='',  y='b'
- * ':'		x='',  y=''
- * '::'		x='',  y=''
- * ': :'	x='',  y=''
- * ':::'	x='',  y='::'
- * ':b c:'	x='',  y='b c:'
- */
-
-int
-readcmd(int argc __unused, char **argv __unused)
-{
-	char **ap;
-	int backslash;
-	char c;
-	int rflag;
-	char *prompt;
-	const char *ifs;
-	char *p;
-	int startword;
-	int status;
-	int i;
-	int is_ifs;
-	int saveall = 0;
-	ptrdiff_t lastnonifs, lastnonifsws;
-	struct timeval tv;
-	char *tvptr;
-	fd_set ifds;
-	ssize_t nread;
-	int sig;
-
-	rflag = 0;
-	prompt = NULL;
-	tv.tv_sec = -1;
-	tv.tv_usec = 0;
-	while ((i = nextopt("erp:t:")) != '\0') {
-		switch(i) {
-		case 'p':
-			prompt = shoptarg;
-			break;
-		case 'e':
-			break;
-		case 'r':
-			rflag = 1;
-			break;
-		case 't':
-			tv.tv_sec = strtol(shoptarg, &tvptr, 0);
-			if (tvptr == shoptarg)
-				error("timeout value");
-			switch(*tvptr) {
-			case 0:
-			case 's':
-				break;
-			case 'h':
-				tv.tv_sec *= 60;
-				/* FALLTHROUGH */
-			case 'm':
-				tv.tv_sec *= 60;
-				break;
-			default:
-				error("timeout unit");
-			}
-			break;
-		}
-	}
-	if (prompt && isatty(0)) {
-		out2str(prompt);
-		flushall();
-	}
-	if (*(ap = argptr) == NULL)
-		error("arg count");
-	if ((ifs = bltinlookup("IFS", 1)) == NULL)
-		ifs = " \t\n";
-
-	if (tv.tv_sec >= 0) {
-		/*
-		 * Wait for something to become available.
-		 */
-		FD_ZERO(&ifds);
-		FD_SET(0, &ifds);
-		status = select(1, &ifds, NULL, NULL, &tv);
-		/*
-		 * If there's nothing ready, return an error.
-		 */
-		if (status <= 0) {
-			sig = pendingsig;
-			return (128 + (sig != 0 ? sig : SIGALRM));
-		}
-	}
-
-	status = 0;
-	startword = 2;
-	backslash = 0;
-	STARTSTACKSTR(p);
-	lastnonifs = lastnonifsws = -1;
-	for (;;) {
-		nread = read(STDIN_FILENO, &c, 1);
-		if (nread == -1) {
-			if (errno == EINTR) {
-				sig = pendingsig;
-				if (sig == 0)
-					continue;
-				status = 128 + sig;
-				break;
-			}
-			warning("read error: %s", strerror(errno));
-			status = 2;
-			break;
-		} else if (nread != 1) {
-			status = 1;
-			break;
-		}
-		if (c == '\0')
-			continue;
-		CHECKSTRSPACE(1, p);
-		if (backslash) {
-			backslash = 0;
-			if (c != '\n') {
-				startword = 0;
-				lastnonifs = lastnonifsws = p - stackblock();
-				USTPUTC(c, p);
-			}
-			continue;
-		}
-		if (!rflag && c == '\\') {
-			backslash++;
-			continue;
-		}
-		if (c == '\n')
-			break;
-		if (strchr(ifs, c))
-			is_ifs = strchr(" \t\n", c) ? 1 : 2;
-		else
-			is_ifs = 0;
-
-		if (startword != 0) {
-			if (is_ifs == 1) {
-				/* Ignore leading IFS whitespace */
-				if (saveall)
-					USTPUTC(c, p);
-				continue;
-			}
-			if (is_ifs == 2 && startword == 1) {
-				/* Only one non-whitespace IFS per word */
-				startword = 2;
-				if (saveall) {
-					lastnonifsws = p - stackblock();
-					USTPUTC(c, p);
-				}
-				continue;
-			}
-		}
-
-		if (is_ifs == 0) {
-			/* append this character to the current variable */
-			startword = 0;
-			if (saveall)
-				/* Not just a spare terminator */
-				saveall++;
-			lastnonifs = lastnonifsws = p - stackblock();
-			USTPUTC(c, p);
-			continue;
-		}
-
-		/* end of variable... */
-		startword = is_ifs;
-
-		if (ap[1] == NULL) {
-			/* Last variable needs all IFS chars */
-			saveall++;
-			if (is_ifs == 2)
-				lastnonifsws = p - stackblock();
-			USTPUTC(c, p);
-			continue;
-		}
-
-		STACKSTRNUL(p);
-		setvar(*ap, stackblock(), 0);
-		ap++;
-		STARTSTACKSTR(p);
-		lastnonifs = lastnonifsws = -1;
-	}
-	STACKSTRNUL(p);
-
-	/*
-	 * Remove trailing IFS chars: always remove whitespace, don't remove
-	 * non-whitespace unless it was naked
-	 */
-	if (saveall <= 1)
-		lastnonifsws = lastnonifs;
-	stackblock()[lastnonifsws + 1] = '\0';
-	setvar(*ap, stackblock(), 0);
-
-	/* Set any remaining args to "" */
-	while (*++ap != NULL)
-		setvar(*ap, "", 0);
-	return status;
-}
-
-
-
-int
-umaskcmd(int argc __unused, char **argv __unused)
-{
-	char *ap;
-	int mask;
-	int i;
-	int symbolic_mode = 0;
-
-	while ((i = nextopt("S")) != '\0') {
-		symbolic_mode = 1;
-	}
-
-	INTOFF;
-	mask = umask(0);
-	umask(mask);
-	INTON;
-
-	if ((ap = *argptr) == NULL) {
-		if (symbolic_mode) {
-			char u[4], g[4], o[4];
-
-			i = 0;
-			if ((mask & S_IRUSR) == 0)
-				u[i++] = 'r';
-			if ((mask & S_IWUSR) == 0)
-				u[i++] = 'w';
-			if ((mask & S_IXUSR) == 0)
-				u[i++] = 'x';
-			u[i] = '\0';
-
-			i = 0;
-			if ((mask & S_IRGRP) == 0)
-				g[i++] = 'r';
-			if ((mask & S_IWGRP) == 0)
-				g[i++] = 'w';
-			if ((mask & S_IXGRP) == 0)
-				g[i++] = 'x';
-			g[i] = '\0';
-
-			i = 0;
-			if ((mask & S_IROTH) == 0)
-				o[i++] = 'r';
-			if ((mask & S_IWOTH) == 0)
-				o[i++] = 'w';
-			if ((mask & S_IXOTH) == 0)
-				o[i++] = 'x';
-			o[i] = '\0';
-
-			out1fmt("u=%s,g=%s,o=%s\n", u, g, o);
-		} else {
-			out1fmt("%.4o\n", mask);
-		}
-	} else {
-		if (is_digit(*ap)) {
-			mask = 0;
-			do {
-				if (*ap >= '8' || *ap < '0')
-					error("Illegal number: %s", *argptr);
-				mask = (mask << 3) + (*ap - '0');
-			} while (*++ap != '\0');
-			umask(mask);
-		} else {
-			void *set;
-			INTOFF;
-			if ((set = setmode (ap)) == NULL)
-				error("Illegal number: %s", ap);
-
-			mask = getmode (set, ~mask & 0777);
-			umask(~mask & 0777);
-			free(set);
-			INTON;
-		}
-	}
-	return 0;
-}
-
-/*
- * ulimit builtin
- *
- * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
- * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
- * ash by J.T. Conklin.
- *
- * Public domain.
- */
-
-struct limits {
-	const char *name;
-	const char *units;
-	int	cmd;
-	short	factor;	/* multiply by to get rlim_{cur,max} values */
-	char	option;
-};
-
-static const struct limits limits[] = {
-#ifdef RLIMIT_CPU
-	{ "cpu time",		"seconds",	RLIMIT_CPU,	   1, 't' },
-#endif
-#ifdef RLIMIT_FSIZE
-	{ "file size",		"512-blocks",	RLIMIT_FSIZE,	 512, 'f' },
-#endif
-#ifdef RLIMIT_DATA
-	{ "data seg size",	"kbytes",	RLIMIT_DATA,	1024, 'd' },
-#endif
-#ifdef RLIMIT_STACK
-	{ "stack size",		"kbytes",	RLIMIT_STACK,	1024, 's' },
-#endif
-#ifdef  RLIMIT_CORE
-	{ "core file size",	"512-blocks",	RLIMIT_CORE,	 512, 'c' },
-#endif
-#ifdef RLIMIT_RSS
-	{ "max memory size",	"kbytes",	RLIMIT_RSS,	1024, 'm' },
-#endif
-#ifdef RLIMIT_MEMLOCK
-	{ "locked memory",	"kbytes",	RLIMIT_MEMLOCK, 1024, 'l' },
-#endif
-#ifdef RLIMIT_NPROC
-	{ "max user processes",	(char *)0,	RLIMIT_NPROC,      1, 'u' },
-#endif
-#ifdef RLIMIT_NOFILE
-	{ "open files",		(char *)0,	RLIMIT_NOFILE,     1, 'n' },
-#endif
-#ifdef RLIMIT_VMEM
-	{ "virtual mem size",	"kbytes",	RLIMIT_VMEM,	1024, 'v' },
-#endif
-#ifdef RLIMIT_SWAP
-	{ "swap limit",		"kbytes",	RLIMIT_SWAP,	1024, 'w' },
-#endif
-#ifdef RLIMIT_SBSIZE
-	{ "socket buffer size",	"bytes",	RLIMIT_SBSIZE,	   1, 'b' },
-#endif
-#ifdef RLIMIT_NPTS
-	{ "pseudo-terminals",	(char *)0,	RLIMIT_NPTS,	   1, 'p' },
-#endif
-#ifdef RLIMIT_KQUEUES
-	{ "kqueues",		(char *)0,	RLIMIT_KQUEUES,	   1, 'k' },
-#endif
-#ifdef RLIMIT_UMTXP
-	{ "umtx shared locks",	(char *)0,	RLIMIT_UMTXP,	   1, 'o' },
-#endif
-	{ (char *) 0,		(char *)0,	0,		   0, '\0' }
-};
-
-enum limithow { SOFT = 0x1, HARD = 0x2 };
-
-static void
-printlimit(enum limithow how, const struct rlimit *limit,
-    const struct limits *l)
-{
-	rlim_t val = 0;
-
-	if (how & SOFT)
-		val = limit->rlim_cur;
-	else if (how & HARD)
-		val = limit->rlim_max;
-	if (val == RLIM_INFINITY)
-		out1str("unlimited\n");
-	else
-	{
-		val /= l->factor;
-		out1fmt("%jd\n", (intmax_t)val);
-	}
-}
-
-int
-ulimitcmd(int argc __unused, char **argv __unused)
-{
-	rlim_t val = 0;
-	enum limithow how = SOFT | HARD;
-	const struct limits	*l;
-	int		set, all = 0;
-	int		optc, what;
-	struct rlimit	limit;
-
-	what = 'f';
-	while ((optc = nextopt("HSatfdsmcnuvlbpwko")) != '\0')
-		switch (optc) {
-		case 'H':
-			how = HARD;
-			break;
-		case 'S':
-			how = SOFT;
-			break;
-		case 'a':
-			all = 1;
-			break;
-		default:
-			what = optc;
-		}
-
-	for (l = limits; l->name && l->option != what; l++)
-		;
-	if (!l->name)
-		error("internal error (%c)", what);
-
-	set = *argptr ? 1 : 0;
-	if (set) {
-		char *p = *argptr;
-
-		if (all || argptr[1])
-			error("too many arguments");
-		if (strcmp(p, "unlimited") == 0)
-			val = RLIM_INFINITY;
-		else {
-			char *end;
-			uintmax_t uval;
-
-			if (*p < '0' || *p > '9')
-				error("bad number");
-			errno = 0;
-			uval = strtoumax(p, &end, 10);
-			if (errno != 0 || *end != '\0')
-				error("bad number");
-			if (uval > UINTMAX_MAX / l->factor)
-				error("bad number");
-			uval *= l->factor;
-			val = (rlim_t)uval;
-			if (val < 0 || (uintmax_t)val != uval ||
-			    val == RLIM_INFINITY)
-				error("bad number");
-		}
-	}
-	if (all) {
-		for (l = limits; l->name; l++) {
-			char optbuf[40];
-			if (getrlimit(l->cmd, &limit) < 0)
-				error("can't get limit: %s", strerror(errno));
-
-			if (l->units)
-				snprintf(optbuf, sizeof(optbuf),
-					"(%s, -%c) ", l->units, l->option);
-			else
-				snprintf(optbuf, sizeof(optbuf),
-					"(-%c) ", l->option);
-			out1fmt("%-18s %18s ", l->name, optbuf);
-			printlimit(how, &limit, l);
-		}
-		return 0;
-	}
-
-	if (getrlimit(l->cmd, &limit) < 0)
-		error("can't get limit: %s", strerror(errno));
-	if (set) {
-		if (how & SOFT)
-			limit.rlim_cur = val;
-		if (how & HARD)
-			limit.rlim_max = val;
-		if (setrlimit(l->cmd, &limit) < 0)
-			error("bad limit: %s", strerror(errno));
-	} else
-		printlimit(how, &limit, l);
-	return 0;
-}
diff --git a/bin/1sh/mkbuiltins b/bin/1sh/mkbuiltins
deleted file mode 100755
index 32c09ec0..00000000
--- a/bin/1sh/mkbuiltins
+++ /dev/null
@@ -1,137 +0,0 @@
-#!/bin/sh -
-
-#-
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)mkbuiltins	8.2 (Berkeley) 5/4/95
-# $FreeBSD: releng/12.0/bin/sh/mkbuiltins 328934 2018-02-06 15:41:35Z arichardson $
-
-temp=`mktemp -t ka`
-havehist=1
-if [ "X$1" = "X-h" ]; then
-	havehist=0
-	shift
-fi
-srcdir=$1
-havejobs=0
-if grep '^#define[	 ]*JOBS[	 ]*1' $srcdir/shell.h > /dev/null
-then	havejobs=1
-fi
-exec > builtins.c
-cat <<\!
-/*
- * This file was generated by the mkbuiltins program.
- */
-
-#include <stdlib.h>
-#include "shell.h"
-#include "builtins.h"
-
-!
-awk '/^[^#]/ {if(('$havejobs' || $2 != "-j") && ('$havehist' || $2 != "-h")) \
-    print $0}' $srcdir/builtins.def | sed 's/-[hj]//' > $temp
-echo 'int (*const builtinfunc[])(int, char **) = {'
-awk '/^[^#]/ {	printf "\t%s,\n", $1}' $temp
-echo '};
-
-const unsigned char builtincmd[] = {'
-awk '{	for (i = 2 ; i <= NF ; i++) {
-		if ($i == "-s") {
-			spc = 1;
-		} else if ($i == "-n") {
-			# Handled later for builtins.h
-			continue
-		} else {
-			printf "\t\"\\%03o\\%03o%s\"\n", length($i), (spc ? 128 : 0) + NR-1, $i
-			spc = 0;
-		}
-	}}' $temp
-echo '};'
-
-exec > builtins.h
-cat <<\!
-/*
- * This file was generated by the mkbuiltins program.
- */
-
-#include <sys/cdefs.h>
-!
-tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ < $temp |
-	awk '{	printf "#define %s %d\n", $1, NR-1}'
-echo '
-#define BUILTIN_SPECIAL 0x80
-
-extern int (*const builtinfunc[])(int, char **);
-extern const unsigned char builtincmd[];
-'
-awk '{	printf "int %s(int, char **);\n", $1}' $temp
-
-# Build safe_builtin_always()
-cat <<EOF
-
-static inline int
-safe_builtin_always(int idx)
-{
-EOF
-awk '
-BEGIN { printed = 0 }
-{
-	for (i = 2 ; i <= NF ; i++) {
-		if ($i == "-s") {
-			continue
-		} else if ($i == "-n") {
-			nofork = 1;
-		} else {
-			if (nofork == 0) {
-				continue
-			}
-			if (printed == 1) {
-				printf " || \n\t    "
-			} else {
-				printf "\tif ("
-			}
-			printf "idx == " toupper($1)
-			printed = 1
-			nofork = 0;
-			# Only need to check each once
-			break
-		}
-	}
-}' $temp
-
-cat << EOF
-)
-		return (1);
-	return(0);
-}
-EOF
-
-rm -f $temp
diff --git a/bin/1sh/mknodes.c b/bin/1sh/mknodes.c
deleted file mode 100644
index cdc615fc..00000000
--- a/bin/1sh/mknodes.c
+++ /dev/null
@@ -1,461 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if 0
-#ifndef lint
-static char const copyright[] =
-"@(#) Copyright (c) 1991, 1993\n\
-	The Regents of the University of California.  All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-static char sccsid[] = "@(#)mknodes.c	8.2 (Berkeley) 5/4/95";
-#endif /* not lint */
-#endif
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/mknodes.c 326025 2017-11-20 19:49:47Z pfg $");
-
-/*
- * This program reads the nodetypes file and nodes.c.pat file.  It generates
- * the files nodes.h and nodes.c.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <stdarg.h>
-
-#define MAXTYPES 50		/* max number of node types */
-#define MAXFIELDS 20		/* max fields in a structure */
-#define BUFLEN 100		/* size of character buffers */
-
-/* field types */
-#define T_NODE 1		/* union node *field */
-#define T_NODELIST 2		/* struct nodelist *field */
-#define T_STRING 3
-#define T_INT 4			/* int field */
-#define T_OTHER 5		/* other */
-#define T_TEMP 6		/* don't copy this field */
-
-
-struct field {			/* a structure field */
-	char *name;		/* name of field */
-	int type;			/* type of field */
-	char *decl;		/* declaration of field */
-};
-
-
-struct str {			/* struct representing a node structure */
-	char *tag;		/* structure tag */
-	int nfields;		/* number of fields in the structure */
-	struct field field[MAXFIELDS];	/* the fields of the structure */
-	int done;			/* set if fully parsed */
-};
-
-
-static int ntypes;			/* number of node types */
-static char *nodename[MAXTYPES];	/* names of the nodes */
-static struct str *nodestr[MAXTYPES];	/* type of structure used by the node */
-static int nstr;			/* number of structures */
-static struct str str[MAXTYPES];	/* the structures */
-static struct str *curstr;		/* current structure */
-static char line[1024];
-static int linno;
-static char *linep;
-
-static void parsenode(void);
-static void parsefield(void);
-static void output(char *);
-static void outsizes(FILE *);
-static void outfunc(FILE *, int);
-static void indent(int, FILE *);
-static int nextfield(char *);
-static void skipbl(void);
-static int readline(FILE *);
-static void error(const char *, ...) __printf0like(1, 2) __dead2;
-static char *savestr(const char *);
-
-
-int
-main(int argc, char *argv[])
-{
-	FILE *infp;
-
-	if (argc != 3)
-		error("usage: mknodes file");
-	if ((infp = fopen(argv[1], "r")) == NULL)
-		error("Can't open %s: %s", argv[1], strerror(errno));
-	while (readline(infp)) {
-		if (line[0] == ' ' || line[0] == '\t')
-			parsefield();
-		else if (line[0] != '\0')
-			parsenode();
-	}
-	fclose(infp);
-	output(argv[2]);
-	exit(0);
-}
-
-
-
-static void
-parsenode(void)
-{
-	char name[BUFLEN];
-	char tag[BUFLEN];
-	struct str *sp;
-
-	if (curstr && curstr->nfields > 0)
-		curstr->done = 1;
-	nextfield(name);
-	if (! nextfield(tag))
-		error("Tag expected");
-	if (*linep != '\0')
-		error("Garbage at end of line");
-	nodename[ntypes] = savestr(name);
-	for (sp = str ; sp < str + nstr ; sp++) {
-		if (strcmp(sp->tag, tag) == 0)
-			break;
-	}
-	if (sp >= str + nstr) {
-		sp->tag = savestr(tag);
-		sp->nfields = 0;
-		curstr = sp;
-		nstr++;
-	}
-	nodestr[ntypes] = sp;
-	ntypes++;
-}
-
-
-static void
-parsefield(void)
-{
-	char name[BUFLEN];
-	char type[BUFLEN];
-	char decl[2 * BUFLEN];
-	struct field *fp;
-
-	if (curstr == NULL || curstr->done)
-		error("No current structure to add field to");
-	if (! nextfield(name))
-		error("No field name");
-	if (! nextfield(type))
-		error("No field type");
-	fp = &curstr->field[curstr->nfields];
-	fp->name = savestr(name);
-	if (strcmp(type, "nodeptr") == 0) {
-		fp->type = T_NODE;
-		sprintf(decl, "union node *%s", name);
-	} else if (strcmp(type, "nodelist") == 0) {
-		fp->type = T_NODELIST;
-		sprintf(decl, "struct nodelist *%s", name);
-	} else if (strcmp(type, "string") == 0) {
-		fp->type = T_STRING;
-		sprintf(decl, "char *%s", name);
-	} else if (strcmp(type, "int") == 0) {
-		fp->type = T_INT;
-		sprintf(decl, "int %s", name);
-	} else if (strcmp(type, "other") == 0) {
-		fp->type = T_OTHER;
-	} else if (strcmp(type, "temp") == 0) {
-		fp->type = T_TEMP;
-	} else {
-		error("Unknown type %s", type);
-	}
-	if (fp->type == T_OTHER || fp->type == T_TEMP) {
-		skipbl();
-		fp->decl = savestr(linep);
-	} else {
-		if (*linep)
-			error("Garbage at end of line");
-		fp->decl = savestr(decl);
-	}
-	curstr->nfields++;
-}
-
-
-static const char writer[] = "\
-/*\n\
- * This file was generated by the mknodes program.\n\
- */\n\
-\n";
-
-static void
-output(char *file)
-{
-	FILE *hfile;
-	FILE *cfile;
-	FILE *patfile;
-	int i;
-	struct str *sp;
-	struct field *fp;
-	char *p;
-
-	if ((patfile = fopen(file, "r")) == NULL)
-		error("Can't open %s: %s", file, strerror(errno));
-	if ((hfile = fopen("nodes.h", "w")) == NULL)
-		error("Can't create nodes.h: %s", strerror(errno));
-	if ((cfile = fopen("nodes.c", "w")) == NULL)
-		error("Can't create nodes.c");
-	fputs(writer, hfile);
-	for (i = 0 ; i < ntypes ; i++)
-		fprintf(hfile, "#define %s %d\n", nodename[i], i);
-	fputs("\n\n\n", hfile);
-	for (sp = str ; sp < &str[nstr] ; sp++) {
-		fprintf(hfile, "struct %s {\n", sp->tag);
-		for (i = sp->nfields, fp = sp->field ; --i >= 0 ; fp++) {
-			fprintf(hfile, "      %s;\n", fp->decl);
-		}
-		fputs("};\n\n\n", hfile);
-	}
-	fputs("union node {\n", hfile);
-	fprintf(hfile, "      int type;\n");
-	for (sp = str ; sp < &str[nstr] ; sp++) {
-		fprintf(hfile, "      struct %s %s;\n", sp->tag, sp->tag);
-	}
-	fputs("};\n\n\n", hfile);
-	fputs("struct nodelist {\n", hfile);
-	fputs("\tstruct nodelist *next;\n", hfile);
-	fputs("\tunion node *n;\n", hfile);
-	fputs("};\n\n\n", hfile);
-	fputs("struct funcdef;\n", hfile);
-	fputs("struct funcdef *copyfunc(union node *);\n", hfile);
-	fputs("union node *getfuncnode(struct funcdef *);\n", hfile);
-	fputs("void reffunc(struct funcdef *);\n", hfile);
-	fputs("void unreffunc(struct funcdef *);\n", hfile);
-	if (ferror(hfile))
-		error("Can't write to nodes.h");
-	if (fclose(hfile))
-		error("Can't close nodes.h");
-
-	fputs(writer, cfile);
-	while (fgets(line, sizeof line, patfile) != NULL) {
-		for (p = line ; *p == ' ' || *p == '\t' ; p++);
-		if (strcmp(p, "%SIZES\n") == 0)
-			outsizes(cfile);
-		else if (strcmp(p, "%CALCSIZE\n") == 0)
-			outfunc(cfile, 1);
-		else if (strcmp(p, "%COPY\n") == 0)
-			outfunc(cfile, 0);
-		else
-			fputs(line, cfile);
-	}
-	fclose(patfile);
-	if (ferror(cfile))
-		error("Can't write to nodes.c");
-	if (fclose(cfile))
-		error("Can't close nodes.c");
-}
-
-
-
-static void
-outsizes(FILE *cfile)
-{
-	int i;
-
-	fprintf(cfile, "static const short nodesize[%d] = {\n", ntypes);
-	for (i = 0 ; i < ntypes ; i++) {
-		fprintf(cfile, "      ALIGN(sizeof (struct %s)),\n", nodestr[i]->tag);
-	}
-	fprintf(cfile, "};\n");
-}
-
-
-static void
-outfunc(FILE *cfile, int calcsize)
-{
-	struct str *sp;
-	struct field *fp;
-	int i;
-
-	fputs("      if (n == NULL)\n", cfile);
-	if (calcsize)
-		fputs("	    return;\n", cfile);
-	else
-		fputs("	    return NULL;\n", cfile);
-	if (calcsize)
-		fputs("      result->blocksize += nodesize[n->type];\n", cfile);
-	else {
-		fputs("      new = state->block;\n", cfile);
-		fputs("      state->block = (char *)state->block + nodesize[n->type];\n", cfile);
-	}
-	fputs("      switch (n->type) {\n", cfile);
-	for (sp = str ; sp < &str[nstr] ; sp++) {
-		for (i = 0 ; i < ntypes ; i++) {
-			if (nodestr[i] == sp)
-				fprintf(cfile, "      case %s:\n", nodename[i]);
-		}
-		for (i = sp->nfields ; --i >= 1 ; ) {
-			fp = &sp->field[i];
-			switch (fp->type) {
-			case T_NODE:
-				if (calcsize) {
-					indent(12, cfile);
-					fprintf(cfile, "calcsize(n->%s.%s, result);\n",
-						sp->tag, fp->name);
-				} else {
-					indent(12, cfile);
-					fprintf(cfile, "new->%s.%s = copynode(n->%s.%s, state);\n",
-						sp->tag, fp->name, sp->tag, fp->name);
-				}
-				break;
-			case T_NODELIST:
-				if (calcsize) {
-					indent(12, cfile);
-					fprintf(cfile, "sizenodelist(n->%s.%s, result);\n",
-						sp->tag, fp->name);
-				} else {
-					indent(12, cfile);
-					fprintf(cfile, "new->%s.%s = copynodelist(n->%s.%s, state);\n",
-						sp->tag, fp->name, sp->tag, fp->name);
-				}
-				break;
-			case T_STRING:
-				if (calcsize) {
-					indent(12, cfile);
-					fprintf(cfile, "result->stringsize += strlen(n->%s.%s) + 1;\n",
-						sp->tag, fp->name);
-				} else {
-					indent(12, cfile);
-					fprintf(cfile, "new->%s.%s = nodesavestr(n->%s.%s, state);\n",
-						sp->tag, fp->name, sp->tag, fp->name);
-				}
-				break;
-			case T_INT:
-			case T_OTHER:
-				if (! calcsize) {
-					indent(12, cfile);
-					fprintf(cfile, "new->%s.%s = n->%s.%s;\n",
-						sp->tag, fp->name, sp->tag, fp->name);
-				}
-				break;
-			}
-		}
-		indent(12, cfile);
-		fputs("break;\n", cfile);
-	}
-	fputs("      };\n", cfile);
-	if (! calcsize)
-		fputs("      new->type = n->type;\n", cfile);
-}
-
-
-static void
-indent(int amount, FILE *fp)
-{
-	while (amount >= 8) {
-		putc('\t', fp);
-		amount -= 8;
-	}
-	while (--amount >= 0) {
-		putc(' ', fp);
-	}
-}
-
-
-static int
-nextfield(char *buf)
-{
-	char *p, *q;
-
-	p = linep;
-	while (*p == ' ' || *p == '\t')
-		p++;
-	q = buf;
-	while (*p != ' ' && *p != '\t' && *p != '\0')
-		*q++ = *p++;
-	*q = '\0';
-	linep = p;
-	return (q > buf);
-}
-
-
-static void
-skipbl(void)
-{
-	while (*linep == ' ' || *linep == '\t')
-		linep++;
-}
-
-
-static int
-readline(FILE *infp)
-{
-	char *p;
-
-	if (fgets(line, 1024, infp) == NULL)
-		return 0;
-	for (p = line ; *p != '#' && *p != '\n' && *p != '\0' ; p++);
-	while (p > line && (p[-1] == ' ' || p[-1] == '\t'))
-		p--;
-	*p = '\0';
-	linep = line;
-	linno++;
-	if (p - line > BUFLEN)
-		error("Line too long");
-	return 1;
-}
-
-
-
-static void
-error(const char *msg, ...)
-{
-	va_list va;
-	va_start(va, msg);
-
-	(void) fprintf(stderr, "line %d: ", linno);
-	(void) vfprintf(stderr, msg, va);
-	(void) fputc('\n', stderr);
-
-	va_end(va);
-
-	exit(2);
-}
-
-
-
-static char *
-savestr(const char *s)
-{
-	char *p;
-
-	if ((p = malloc(strlen(s) + 1)) == NULL)
-		error("Out of space");
-	(void) strcpy(p, s);
-	return p;
-}
diff --git a/bin/1sh/mksyntax.c b/bin/1sh/mksyntax.c
deleted file mode 100644
index a023da60..00000000
--- a/bin/1sh/mksyntax.c
+++ /dev/null
@@ -1,332 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if 0
-#ifndef lint
-static char const copyright[] =
-"@(#) Copyright (c) 1991, 1993\n\
-	The Regents of the University of California.  All rights reserved.\n";
-#endif /* not lint */
-
-#ifndef lint
-static char sccsid[] = "@(#)mksyntax.c	8.2 (Berkeley) 5/4/95";
-#endif /* not lint */
-#endif
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/mksyntax.c 334008 2018-05-21 21:52:48Z jilles $");
-
-/*
- * This program creates syntax.h and syntax.c.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "parser.h"
-
-
-struct synclass {
-	const char *name;
-	const char *comment;
-};
-
-/* Syntax classes */
-static const struct synclass synclass[] = {
-	{ "CWORD",	"character is nothing special" },
-	{ "CNL",	"newline character" },
-	{ "CQNL",	"newline character in quotes" },
-	{ "CBACK",	"a backslash character" },
-	{ "CSBACK",	"a backslash character in single quotes" },
-	{ "CSQUOTE",	"single quote" },
-	{ "CDQUOTE",	"double quote" },
-	{ "CENDQUOTE",	"a terminating quote" },
-	{ "CBQUOTE",	"backwards single quote" },
-	{ "CVAR",	"a dollar sign" },
-	{ "CENDVAR",	"a '}' character" },
-	{ "CLP",	"a left paren in arithmetic" },
-	{ "CRP",	"a right paren in arithmetic" },
-	{ "CEOF",	"end of file" },
-	{ "CCTL",	"like CWORD, except it must be escaped" },
-	{ "CSPCL",	"these terminate a word" },
-	{ "CIGN",       "character should be ignored" },
-	{ NULL,		NULL }
-};
-
-
-/*
- * Syntax classes for is_ functions.  Warning:  if you add new classes
- * you may have to change the definition of the is_in_name macro.
- */
-static const struct synclass is_entry[] = {
-	{ "ISDIGIT",	"a digit" },
-	{ "ISUPPER",	"an upper case letter" },
-	{ "ISLOWER",	"a lower case letter" },
-	{ "ISUNDER",	"an underscore" },
-	{ "ISSPECL",	"the name of a special parameter" },
-	{ NULL, 	NULL }
-};
-
-static const char writer[] = "\
-/*\n\
- * This file was generated by the mksyntax program.\n\
- */\n\
-\n";
-
-
-static FILE *cfile;
-static FILE *hfile;
-
-static void add_default(void);
-static void finish(void);
-static void init(const char *);
-static void add(const char *, const char *);
-static void output_type_macros(void);
-
-int
-main(int argc __unused, char **argv __unused)
-{
-	int i;
-	char buf[80];
-	int pos;
-
-	/* Create output files */
-	if ((cfile = fopen("syntax.c", "w")) == NULL) {
-		perror("syntax.c");
-		exit(2);
-	}
-	if ((hfile = fopen("syntax.h", "w")) == NULL) {
-		perror("syntax.h");
-		exit(2);
-	}
-	fputs(writer, hfile);
-	fputs(writer, cfile);
-
-	fputs("#include <sys/cdefs.h>\n", hfile);
-	fputs("#include <limits.h>\n\n", hfile);
-
-	/* Generate the #define statements in the header file */
-	fputs("/* Syntax classes */\n", hfile);
-	for (i = 0 ; synclass[i].name ; i++) {
-		sprintf(buf, "#define %s %d", synclass[i].name, i);
-		fputs(buf, hfile);
-		for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
-			putc('\t', hfile);
-		fprintf(hfile, "/* %s */\n", synclass[i].comment);
-	}
-	putc('\n', hfile);
-	fputs("/* Syntax classes for is_ functions */\n", hfile);
-	for (i = 0 ; is_entry[i].name ; i++) {
-		sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
-		fputs(buf, hfile);
-		for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
-			putc('\t', hfile);
-		fprintf(hfile, "/* %s */\n", is_entry[i].comment);
-	}
-	putc('\n', hfile);
-	fputs("#define SYNBASE (1 - CHAR_MIN)\n", hfile);
-	fputs("#define PEOF -SYNBASE\n\n", hfile);
-	putc('\n', hfile);
-	fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
-	fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
-	fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
-	fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
-	putc('\n', hfile);
-	output_type_macros();		/* is_digit, etc. */
-	putc('\n', hfile);
-
-	/* Generate the syntax tables. */
-	fputs("#include \"parser.h\"\n", cfile);
-	fputs("#include \"shell.h\"\n", cfile);
-	fputs("#include \"syntax.h\"\n\n", cfile);
-
-	fputs("/* syntax table used when not in quotes */\n", cfile);
-	init("basesyntax");
-	add_default();
-	add("\n", "CNL");
-	add("\\", "CBACK");
-	add("'", "CSQUOTE");
-	add("\"", "CDQUOTE");
-	add("`", "CBQUOTE");
-	add("$", "CVAR");
-	add("}", "CENDVAR");
-	add("<>();&| \t", "CSPCL");
-	finish();
-
-	fputs("\n/* syntax table used when in double quotes */\n", cfile);
-	init("dqsyntax");
-	add_default();
-	add("\n", "CQNL");
-	add("\\", "CBACK");
-	add("\"", "CENDQUOTE");
-	add("`", "CBQUOTE");
-	add("$", "CVAR");
-	add("}", "CENDVAR");
-	/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
-	add("!*?[]=~:/-^", "CCTL");
-	finish();
-
-	fputs("\n/* syntax table used when in single quotes */\n", cfile);
-	init("sqsyntax");
-	add_default();
-	add("\n", "CQNL");
-	add("\\", "CSBACK");
-	add("'", "CENDQUOTE");
-	/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
-	add("!*?[]=~:/-^", "CCTL");
-	finish();
-
-	fputs("\n/* syntax table used when in arithmetic */\n", cfile);
-	init("arisyntax");
-	add_default();
-	add("\n", "CQNL");
-	add("\\", "CBACK");
-	add("`", "CBQUOTE");
-	add("\"", "CIGN");
-	add("$", "CVAR");
-	add("}", "CENDVAR");
-	add("(", "CLP");
-	add(")", "CRP");
-	finish();
-
-	fputs("\n/* character classification table */\n", cfile);
-	init("is_type");
-	add("0123456789", "ISDIGIT");
-	add("abcdefghijklmnopqrstuvwxyz", "ISLOWER");
-	add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER");
-	add("_", "ISUNDER");
-	add("#?$!-*@", "ISSPECL");
-	finish();
-
-	exit(0);
-}
-
-
-/*
- * Output the header and declaration of a syntax table.
- */
-
-static void
-init(const char *name)
-{
-	fprintf(hfile, "extern const char %s[];\n", name);
-	fprintf(cfile, "const char %s[SYNBASE + CHAR_MAX + 1] = {\n", name);
-}
-
-
-static void
-add_one(const char *key, const char *type)
-{
-	fprintf(cfile, "\t[SYNBASE + %s] = %s,\n", key, type);
-}
-
-
-/*
- * Add default values to the syntax table.
- */
-
-static void
-add_default(void)
-{
-	add_one("PEOF",                "CEOF");
-	add_one("CTLESC",              "CCTL");
-	add_one("CTLVAR",              "CCTL");
-	add_one("CTLENDVAR",           "CCTL");
-	add_one("CTLBACKQ",            "CCTL");
-	add_one("CTLBACKQ + CTLQUOTE", "CCTL");
-	add_one("CTLARI",              "CCTL");
-	add_one("CTLENDARI",           "CCTL");
-	add_one("CTLQUOTEMARK",        "CCTL");
-	add_one("CTLQUOTEEND",         "CCTL");
-}
-
-
-/*
- * Output the footer of a syntax table.
- */
-
-static void
-finish(void)
-{
-	fputs("};\n", cfile);
-}
-
-
-/*
- * Add entries to the syntax table.
- */
-
-static void
-add(const char *p, const char *type)
-{
-	for (; *p; ++p) {
-		char c = *p;
-		switch (c) {
-		case '\t': c = 't';  break;
-		case '\n': c = 'n';  break;
-		case '\'': c = '\''; break;
-		case '\\': c = '\\'; break;
-
-		default:
-			fprintf(cfile, "\t[SYNBASE + '%c'] = %s,\n", c, type);
-			continue;
-		}
-		fprintf(cfile, "\t[SYNBASE + '\\%c'] = %s,\n", c, type);
-	}
-}
-
-
-/*
- * Output character classification macros (e.g. is_digit).  If digits are
- * contiguous, we can test for them quickly.
- */
-
-static const char *macro[] = {
-	"#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)",
-	"#define is_eof(c)\t((c) == PEOF)",
-	"#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))",
-	"#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))",
-	"#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
-	"#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))",
-	"#define digit_val(c)\t((c) - '0')",
-	NULL
-};
-
-static void
-output_type_macros(void)
-{
-	const char **pp;
-
-	for (pp = macro ; *pp ; pp++)
-		fprintf(hfile, "%s\n", *pp);
-}
diff --git a/bin/1sh/mktokens b/bin/1sh/mktokens
deleted file mode 100644
index da6ae962..00000000
--- a/bin/1sh/mktokens
+++ /dev/null
@@ -1,93 +0,0 @@
-#!/bin/sh -
-
-#-
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)mktokens	8.1 (Berkeley) 5/31/93
-# $FreeBSD: releng/12.0/bin/sh/mktokens 328934 2018-02-06 15:41:35Z arichardson $
-
-# The following is a list of tokens.  The second column is nonzero if the
-# token marks the end of a list.  The third column is the name to print in
-# error messages.
-
-temp=`mktemp -t ka`
-cat > $temp <<\!
-TEOF	1	end of file
-TNL	0	newline
-TSEMI	0	";"
-TBACKGND 0	"&"
-TAND	0	"&&"
-TOR	0	"||"
-TPIPE	0	"|"
-TLP	0	"("
-TRP	1	")"
-TENDCASE 1	";;"
-TFALLTHRU 1	";&"
-TREDIR	0	redirection
-TWORD	0	word
-TIF	0	"if"
-TTHEN	1	"then"
-TELSE	1	"else"
-TELIF	1	"elif"
-TFI	1	"fi"
-TWHILE	0	"while"
-TUNTIL	0	"until"
-TFOR	0	"for"
-TDO	1	"do"
-TDONE	1	"done"
-TBEGIN	0	"{"
-TEND	1	"}"
-TCASE	0	"case"
-TESAC	1	"esac"
-TNOT	0	"!"
-!
-nl=`wc -l $temp`
-exec > token.h
-awk '{print "#define " $1 " " NR-1}' $temp
-echo '
-/* Array indicating which tokens mark the end of a list */
-static const char tokendlist[] = {'
-awk '{print "\t" $2 ","}' $temp
-echo '};
-
-static const char *const tokname[] = {'
-sed -e 's/"/\\"/g' \
-    -e 's/[^	 ]*[	 ][	 ]*[^	 ]*[	 ][	 ]*\(.*\)/	"\1",/' \
-    $temp
-echo '};
-'
-sed 's/"//g' $temp | awk '
-/TIF/{print "#define KWDOFFSET " NR-1; print ""; print "const char *const parsekwd[] = {"}
-/TIF/,/neverfound/{print "	\"" $3 "\","}'
-echo '	0
-};'
-
-rm $temp
diff --git a/bin/1sh/myhistedit.h b/bin/1sh/myhistedit.h
deleted file mode 100644
index feb4803e..00000000
--- a/bin/1sh/myhistedit.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)myhistedit.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/myhistedit.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-#include <histedit.h>
-
-extern History *hist;
-extern EditLine *el;
-extern int displayhist;
-
-void histedit(void);
-void sethistfile(const char *);
-void sethistsize(const char *);
-void setterm(const char *);
-
diff --git a/bin/1sh/mystring.c b/bin/1sh/mystring.c
deleted file mode 100644
index a96d4fa5..00000000
--- a/bin/1sh/mystring.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)mystring.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/mystring.c 326025 2017-11-20 19:49:47Z pfg $");
-
-/*
- * String functions.
- *
- *	equal(s1, s2)		Return true if strings are equal.
- *	number(s)		Convert a string of digits to an integer.
- *	is_number(s)		Return true if s is a string of digits.
- */
-
-#include <stdlib.h>
-#include "shell.h"
-#include "syntax.h"
-#include "error.h"
-#include "mystring.h"
-
-
-char nullstr[1];		/* zero length string */
-
-/*
- * equal - #defined in mystring.h
- */
-
-
-/*
- * Convert a string of digits to an integer, printing an error message on
- * failure.
- */
-
-int
-number(const char *s)
-{
-	if (! is_number(s))
-		error("Illegal number: %s", s);
-	return atoi(s);
-}
-
-
-
-/*
- * Check for a valid number.  This should be elsewhere.
- */
-
-int
-is_number(const char *p)
-{
-	const char *q;
-
-	if (*p == '\0')
-		return 0;
-	while (*p == '0')
-		p++;
-	for (q = p; *q != '\0'; q++)
-		if (! is_digit(*q))
-			return 0;
-	if (q - p > 10 ||
-	    (q - p == 10 && memcmp(p, "2147483647", 10) > 0))
-		return 0;
-	return 1;
-}
diff --git a/bin/1sh/mystring.h b/bin/1sh/mystring.h
deleted file mode 100644
index f4fc9af4..00000000
--- a/bin/1sh/mystring.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)mystring.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/mystring.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-#include <string.h>
-
-int number(const char *);
-int is_number(const char *);
-
-#define equal(s1, s2)	(strcmp(s1, s2) == 0)
diff --git a/bin/1sh/nodes.c.pat b/bin/1sh/nodes.c.pat
deleted file mode 100644
index eeb82737..00000000
--- a/bin/1sh/nodes.c.pat
+++ /dev/null
@@ -1,193 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)nodes.c.pat	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/nodes.c.pat 314436 2017-02-28 23:42:47Z imp $
- */
-
-#include <sys/param.h>
-#include <stdlib.h>
-#include <stddef.h>
-/*
- * Routine for dealing with parsed shell commands.
- */
-
-#include "shell.h"
-#include "nodes.h"
-#include "memalloc.h"
-#include "mystring.h"
-
-
-struct nodesize {
-	int     blocksize;	/* size of structures in function */
-	int     stringsize;	/* size of strings in node */
-};
-
-struct nodecopystate {
-	pointer block;		/* block to allocate function from */
-	char   *string;		/* block to allocate strings from */
-};
-
-%SIZES
-
-
-static void calcsize(union node *, struct nodesize *);
-static void sizenodelist(struct nodelist *, struct nodesize *);
-static union node *copynode(union node *, struct nodecopystate *);
-static struct nodelist *copynodelist(struct nodelist *, struct nodecopystate *);
-static char *nodesavestr(const char *, struct nodecopystate *);
-
-
-struct funcdef {
-	unsigned int refcount;
-	union node n;
-};
-
-/*
- * Make a copy of a parse tree.
- */
-
-struct funcdef *
-copyfunc(union node *n)
-{
-	struct nodesize sz;
-	struct nodecopystate st;
-	struct funcdef *fn;
-
-	if (n == NULL)
-		return NULL;
-	sz.blocksize = offsetof(struct funcdef, n);
-	sz.stringsize = 0;
-	calcsize(n, &sz);
-	fn = ckmalloc(sz.blocksize + sz.stringsize);
-	fn->refcount = 1;
-	st.block = (char *)fn + offsetof(struct funcdef, n);
-	st.string = (char *)fn + sz.blocksize;
-	copynode(n, &st);
-	return fn;
-}
-
-
-union node *
-getfuncnode(struct funcdef *fn)
-{
-	return fn == NULL ? NULL : &fn->n;
-}
-
-
-static void
-calcsize(union node *n, struct nodesize *result)
-{
-	%CALCSIZE
-}
-
-
-
-static void
-sizenodelist(struct nodelist *lp, struct nodesize *result)
-{
-	while (lp) {
-		result->blocksize += ALIGN(sizeof(struct nodelist));
-		calcsize(lp->n, result);
-		lp = lp->next;
-	}
-}
-
-
-
-static union node *
-copynode(union node *n, struct nodecopystate *state)
-{
-	union node *new;
-
-	%COPY
-	return new;
-}
-
-
-static struct nodelist *
-copynodelist(struct nodelist *lp, struct nodecopystate *state)
-{
-	struct nodelist *start;
-	struct nodelist **lpp;
-
-	lpp = &start;
-	while (lp) {
-		*lpp = state->block;
-		state->block = (char *)state->block +
-		    ALIGN(sizeof(struct nodelist));
-		(*lpp)->n = copynode(lp->n, state);
-		lp = lp->next;
-		lpp = &(*lpp)->next;
-	}
-	*lpp = NULL;
-	return start;
-}
-
-
-
-static char *
-nodesavestr(const char *s, struct nodecopystate *state)
-{
-	const char *p = s;
-	char *q = state->string;
-	char   *rtn = state->string;
-
-	while ((*q++ = *p++) != '\0')
-		continue;
-	state->string = q;
-	return rtn;
-}
-
-
-void
-reffunc(struct funcdef *fn)
-{
-	if (fn)
-		fn->refcount++;
-}
-
-
-/*
- * Decrement the reference count of a function definition, freeing it
- * if it falls to 0.
- */
-
-void
-unreffunc(struct funcdef *fn)
-{
-	if (fn) {
-		fn->refcount--;
-		if (fn->refcount > 0)
-			return;
-		ckfree(fn);
-	}
-}
diff --git a/bin/1sh/nodetypes b/bin/1sh/nodetypes
deleted file mode 100644
index 0bb29c8e..00000000
--- a/bin/1sh/nodetypes
+++ /dev/null
@@ -1,145 +0,0 @@
-#-
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)nodetypes	8.2 (Berkeley) 5/4/95
-# $FreeBSD: releng/12.0/bin/sh/nodetypes 314436 2017-02-28 23:42:47Z imp $
-
-# This file describes the nodes used in parse trees.  Unindented lines
-# contain a node type followed by a structure tag.  Subsequent indented
-# lines specify the fields of the structure.  Several node types can share
-# the same structure, in which case the fields of the structure should be
-# specified only once.
-#
-# A field of a structure is described by the name of the field followed
-# by a type.  The currently implemented types are:
-#	nodeptr - a pointer to a node
-#	nodelist - a pointer to a list of nodes
-#	string - a pointer to a nul terminated string
-#	int - an integer
-#	other - any type that can be copied by assignment
-#	temp - a field that doesn't have to be copied when the node is copied
-# The last two types should be followed by the text of a C declaration for
-# the field.
-
-NSEMI nbinary			# two commands separated by a semicolon
-	type	  int
-	ch1	  nodeptr		# the first child
-	ch2	  nodeptr		# the second child
-
-NCMD ncmd			# a simple command
-	type	  int
-	args	  nodeptr		# the arguments
-	redirect  nodeptr		# list of file redirections
-
-NPIPE npipe			# a pipeline
-	type	  int
-	backgnd	  int			# set to run pipeline in background
-	cmdlist	  nodelist		# the commands in the pipeline
-
-NREDIR nredir			# redirection (of a compex command)
-	type	  int
-	n	  nodeptr		# the command
-	redirect  nodeptr		# list of file redirections
-
-NBACKGND nredir			# run command in background
-NSUBSHELL nredir		# run command in a subshell
-
-NAND nbinary			# the && operator
-NOR nbinary			# the || operator
-
-NIF nif				# the if statement.  Elif clauses are handled
-	type	  int		    # using multiple if nodes.
-	test	  nodeptr		# if test
-	ifpart	  nodeptr		# then ifpart
-	elsepart  nodeptr		# else elsepart
-
-NWHILE nbinary			# the while statement.  First child is the test
-NUNTIL nbinary			# the until statement
-
-NFOR nfor			# the for statement
-	type	  int
-	args	  nodeptr		# for var in args
-	body	  nodeptr		# do body; done
-	var	  string		# the for variable
-
-NCASE ncase			# a case statement
-	type	  int
-	expr	  nodeptr		# the word to switch on
-	cases	  nodeptr		# the list of cases (NCLIST nodes)
-
-NCLIST nclist			# a case ending with ;;
-	type	  int
-	next	  nodeptr		# the next case in list
-	pattern	  nodeptr		# list of patterns for this case
-	body	  nodeptr		# code to execute for this case
-
-NCLISTFALLTHRU nclist		# a case ending with ;&
-
-NDEFUN narg			# define a function.  The "next" field contains
-				# the body of the function.
-
-NARG narg			# represents a word
-	type	  int
-	next	  nodeptr		# next word in list
-	text	  string		# the text of the word
-	backquote nodelist		# list of commands in back quotes
-
-NTO nfile			# fd> fname
-NFROM nfile			# fd< fname
-NFROMTO nfile			# fd<> fname
-NAPPEND nfile			# fd>> fname
-NCLOBBER nfile			# fd>| fname
-	type	  int
-	fd	  int			# file descriptor being redirected
-	next	  nodeptr		# next redirection in list
-	fname	  nodeptr		# file name, in a NARG node
-	expfname  temp	char *expfname	# actual file name
-
-NTOFD ndup			# fd<&dupfd
-NFROMFD ndup			# fd>&dupfd
-	type	  int
-	fd	  int			# file descriptor being redirected
-	next	  nodeptr		# next redirection in list
-	dupfd	  int			# file descriptor to duplicate
-	vname	  nodeptr		# file name if fd>&$var
-
-
-NHERE nhere			# fd<<\!
-NXHERE nhere			# fd<<!
-	type	  int
-	fd	  int			# file descriptor being redirected
-	next	  nodeptr		# next redirection in list
-	doc	  nodeptr		# input to command (NARG node)
-	expdoc    temp	const char *expdoc	# actual document (for NXHERE)
-
-NNOT nnot			# ! command  (actually pipeline)
-	type	int
-	com	nodeptr
diff --git a/bin/1sh/options.c b/bin/1sh/options.c
deleted file mode 100644
index 422c0f19..00000000
--- a/bin/1sh/options.c
+++ /dev/null
@@ -1,594 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)options.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/options.c 326025 2017-11-20 19:49:47Z pfg $");
-
-#include <signal.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#define DEFINE_OPTIONS
-#include "options.h"
-#undef DEFINE_OPTIONS
-#include "nodes.h"	/* for other header files */
-#include "eval.h"
-#include "jobs.h"
-#include "input.h"
-#include "output.h"
-#include "trap.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "builtins.h"
-#ifndef NO_HISTORY
-#include "myhistedit.h"
-#endif
-
-char *arg0;			/* value of $0 */
-struct shparam shellparam;	/* current positional parameters */
-char **argptr;			/* argument list for builtin commands */
-char *shoptarg;			/* set by nextopt (like getopt) */
-char *nextopt_optptr;		/* used by nextopt */
-
-char *minusc;			/* argument to -c option */
-
-
-static void options(int);
-static void minus_o(char *, int);
-static void setoption(int, int);
-static void setoptionbyindex(int, int);
-static void setparam(int, char **);
-static int getopts(char *, char *, char **, char ***, char **);
-
-
-/*
- * Process the shell command line arguments.
- */
-
-void
-procargs(int argc, char **argv)
-{
-	int i;
-	char *scriptname;
-
-	argptr = argv;
-	if (argc > 0)
-		argptr++;
-	for (i = 0; i < NOPTS; i++)
-		optval[i] = 2;
-	privileged = (getuid() != geteuid() || getgid() != getegid());
-	options(1);
-	if (*argptr == NULL && minusc == NULL)
-		sflag = 1;
-	if (iflag != 0 && sflag == 1 && isatty(0) && isatty(1)) {
-		iflag = 1;
-		if (Eflag == 2)
-			Eflag = 1;
-	}
-	if (mflag == 2)
-		mflag = iflag;
-	for (i = 0; i < NOPTS; i++)
-		if (optval[i] == 2)
-			optval[i] = 0;
-	arg0 = argv[0];
-	if (sflag == 0 && minusc == NULL) {
-		scriptname = *argptr++;
-		setinputfile(scriptname, 0);
-		commandname = arg0 = scriptname;
-	}
-	/* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
-	if (argptr && minusc && *argptr)
-		arg0 = *argptr++;
-
-	shellparam.p = argptr;
-	shellparam.reset = 1;
-	/* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
-	while (*argptr) {
-		shellparam.nparam++;
-		argptr++;
-	}
-	optschanged();
-}
-
-
-void
-optschanged(void)
-{
-	setinteractive();
-#ifndef NO_HISTORY
-	histedit();
-#endif
-	setjobctl(mflag);
-}
-
-/*
- * Process shell options.  The global variable argptr contains a pointer
- * to the argument list; we advance it past the options.
- * If cmdline is true, process the shell's argv; otherwise, process arguments
- * to the set special builtin.
- */
-
-static void
-options(int cmdline)
-{
-	char *kp, *p;
-	int val;
-	int c;
-
-	if (cmdline)
-		minusc = NULL;
-	while ((p = *argptr) != NULL) {
-		argptr++;
-		if ((c = *p++) == '-') {
-			val = 1;
-			/* A "-" or  "--" terminates options */
-			if (p[0] == '\0')
-				goto end_options1;
-			if (p[0] == '-' && p[1] == '\0')
-				goto end_options2;
-			/**
-			 * For the benefit of `#!' lines in shell scripts,
-			 * treat a string of '-- *#.*' the same as '--'.
-			 * This is needed so that a script starting with:
-			 *	#!/bin/sh -- # -*- perl -*-
-			 * will continue to work after a change is made to
-			 * kern/imgact_shell.c to NOT token-ize the options
-			 * specified on a '#!' line.  A bit of a kludge,
-			 * but that trick is recommended in documentation
-			 * for some scripting languages, and we might as
-			 * well continue to support it.
-			 */
-			if (p[0] == '-') {
-				kp = p + 1;
-				while (*kp == ' ' || *kp == '\t')
-					kp++;
-				if (*kp == '#' || *kp == '\0')
-					goto end_options2;
-			}
-		} else if (c == '+') {
-			val = 0;
-		} else {
-			argptr--;
-			break;
-		}
-		while ((c = *p++) != '\0') {
-			if (c == 'c' && cmdline) {
-				char *q;
-
-				q = *argptr++;
-				if (q == NULL || minusc != NULL)
-					error("Bad -c option");
-				minusc = q;
-			} else if (c == 'o') {
-				minus_o(*argptr, val);
-				if (*argptr)
-					argptr++;
-			} else
-				setoption(c, val);
-		}
-	}
-	return;
-
-	/* When processing `set', a single "-" means turn off -x and -v */
-end_options1:
-	if (!cmdline) {
-		xflag = vflag = 0;
-		return;
-	}
-
-	/*
-	 * When processing `set', a "--" means the remaining arguments
-	 * replace the positional parameters in the active shell.  If
-	 * there are no remaining options, then all the positional
-	 * parameters are cleared (equivalent to doing ``shift $#'').
-	 */
-end_options2:
-	if (!cmdline) {
-		if (*argptr == NULL)
-			setparam(0, argptr);
-		return;
-	}
-
-	/*
-	 * At this point we are processing options given to 'sh' on a command
-	 * line.  If an end-of-options marker ("-" or "--") is followed by an
-	 * arg of "#", then skip over all remaining arguments.  Some scripting
-	 * languages (e.g.: perl) document that /bin/sh will implement this
-	 * behavior, and they recommend that users take advantage of it to
-	 * solve certain issues that can come up when writing a perl script.
-	 * Yes, this feature is in /bin/sh to help users write perl scripts.
-	 */
-	p = *argptr;
-	if (p != NULL && p[0] == '#' && p[1] == '\0') {
-		while (*argptr != NULL)
-			argptr++;
-		/* We need to keep the final argument */
-		argptr--;
-	}
-}
-
-static void
-minus_o(char *name, int val)
-{
-	int i;
-	const unsigned char *on;
-	size_t len;
-
-	if (name == NULL) {
-		if (val) {
-			/* "Pretty" output. */
-			out1str("Current option settings\n");
-			for (i = 0, on = optname; i < NOPTS; i++, on += *on + 1)
-				out1fmt("%-16.*s%s\n", *on, on + 1,
-					optval[i] ? "on" : "off");
-		} else {
-			/* Output suitable for re-input to shell. */
-			for (i = 0, on = optname; i < NOPTS; i++, on += *on + 1)
-				out1fmt("%s %co %.*s%s",
-				    i % 6 == 0 ? "set" : "",
-				    optval[i] ? '-' : '+',
-				    *on, on + 1,
-				    i % 6 == 5 || i == NOPTS - 1 ? "\n" : "");
-		}
-	} else {
-		len = strlen(name);
-		for (i = 0, on = optname; i < NOPTS; i++, on += *on + 1)
-			if (*on == len && memcmp(on + 1, name, len) == 0) {
-				setoptionbyindex(i, val);
-				return;
-			}
-		error("Illegal option -o %s", name);
-	}
-}
-
-
-static void
-setoptionbyindex(int idx, int val)
-{
-	if (&optval[idx] == &privileged && !val && privileged) {
-		if (setgid(getgid()) == -1)
-			error("setgid");
-		if (setuid(getuid()) == -1)
-			error("setuid");
-	}
-	optval[idx] = val;
-	if (val) {
-		/* #%$ hack for ksh semantics */
-		if (&optval[idx] == &Vflag)
-			Eflag = 0;
-		else if (&optval[idx] == &Eflag)
-			Vflag = 0;
-	}
-}
-
-static void
-setoption(int flag, int val)
-{
-	int i;
-
-	for (i = 0; i < NSHORTOPTS; i++)
-		if (optletter[i] == flag) {
-			setoptionbyindex(i, val);
-			return;
-		}
-	error("Illegal option -%c", flag);
-}
-
-
-/*
- * Set the shell parameters.
- */
-
-static void
-setparam(int argc, char **argv)
-{
-	char **newparam;
-	char **ap;
-
-	ap = newparam = ckmalloc((argc + 1) * sizeof *ap);
-	while (*argv) {
-		*ap++ = savestr(*argv++);
-	}
-	*ap = NULL;
-	freeparam(&shellparam);
-	shellparam.malloc = 1;
-	shellparam.nparam = argc;
-	shellparam.p = newparam;
-	shellparam.optp = NULL;
-	shellparam.reset = 1;
-	shellparam.optnext = NULL;
-}
-
-
-/*
- * Free the list of positional parameters.
- */
-
-void
-freeparam(struct shparam *param)
-{
-	char **ap;
-
-	if (param->malloc) {
-		for (ap = param->p ; *ap ; ap++)
-			ckfree(*ap);
-		ckfree(param->p);
-	}
-	if (param->optp) {
-		for (ap = param->optp ; *ap ; ap++)
-			ckfree(*ap);
-		ckfree(param->optp);
-	}
-}
-
-
-
-/*
- * The shift builtin command.
- */
-
-int
-shiftcmd(int argc, char **argv)
-{
-	int i, n;
-
-	n = 1;
-	if (argc > 1)
-		n = number(argv[1]);
-	if (n > shellparam.nparam)
-		return 1;
-	INTOFF;
-	shellparam.nparam -= n;
-	if (shellparam.malloc)
-		for (i = 0; i < n; i++)
-			ckfree(shellparam.p[i]);
-	memmove(shellparam.p, shellparam.p + n,
-	    (shellparam.nparam + 1) * sizeof(shellparam.p[0]));
-	shellparam.reset = 1;
-	INTON;
-	return 0;
-}
-
-
-
-/*
- * The set builtin command.
- */
-
-int
-setcmd(int argc, char **argv)
-{
-	if (argc == 1)
-		return showvarscmd(argc, argv);
-	INTOFF;
-	options(0);
-	optschanged();
-	if (*argptr != NULL) {
-		setparam(argc - (argptr - argv), argptr);
-	}
-	INTON;
-	return 0;
-}
-
-
-void
-getoptsreset(const char *value)
-{
-	while (*value == '0')
-		value++;
-	if (strcmp(value, "1") == 0)
-		shellparam.reset = 1;
-}
-
-/*
- * The getopts builtin.  Shellparam.optnext points to the next argument
- * to be processed.  Shellparam.optptr points to the next character to
- * be processed in the current argument.  If shellparam.optnext is NULL,
- * then it's the first time getopts has been called.
- */
-
-int
-getoptscmd(int argc, char **argv)
-{
-	char **optbase = NULL, **ap;
-	int i;
-
-	if (argc < 3)
-		error("usage: getopts optstring var [arg]");
-
-	if (shellparam.reset == 1) {
-		INTOFF;
-		if (shellparam.optp) {
-			for (ap = shellparam.optp ; *ap ; ap++)
-				ckfree(*ap);
-			ckfree(shellparam.optp);
-			shellparam.optp = NULL;
-		}
-		if (argc > 3) {
-			shellparam.optp = ckmalloc((argc - 2) * sizeof *ap);
-			memset(shellparam.optp, '\0', (argc - 2) * sizeof *ap);
-			for (i = 0; i < argc - 3; i++)
-				shellparam.optp[i] = savestr(argv[i + 3]);
-		}
-		INTON;
-		optbase = argc == 3 ? shellparam.p : shellparam.optp;
-		shellparam.optnext = optbase;
-		shellparam.optptr = NULL;
-		shellparam.reset = 0;
-	} else
-		optbase = shellparam.optp ? shellparam.optp : shellparam.p;
-
-	return getopts(argv[1], argv[2], optbase, &shellparam.optnext,
-		       &shellparam.optptr);
-}
-
-static int
-getopts(char *optstr, char *optvar, char **optfirst, char ***optnext,
-    char **optptr)
-{
-	char *p, *q;
-	char c = '?';
-	int done = 0;
-	int ind = 0;
-	int err = 0;
-	char s[10];
-	const char *newoptarg = NULL;
-
-	if ((p = *optptr) == NULL || *p == '\0') {
-		/* Current word is done, advance */
-		if (*optnext == NULL)
-			return 1;
-		p = **optnext;
-		if (p == NULL || *p != '-' || *++p == '\0') {
-atend:
-			ind = *optnext - optfirst + 1;
-			*optnext = NULL;
-			p = NULL;
-			done = 1;
-			goto out;
-		}
-		(*optnext)++;
-		if (p[0] == '-' && p[1] == '\0')	/* check for "--" */
-			goto atend;
-	}
-
-	c = *p++;
-	for (q = optstr; *q != c; ) {
-		if (*q == '\0') {
-			if (optstr[0] == ':') {
-				s[0] = c;
-				s[1] = '\0';
-				newoptarg = s;
-			}
-			else
-				out2fmt_flush("Illegal option -%c\n", c);
-			c = '?';
-			goto out;
-		}
-		if (*++q == ':')
-			q++;
-	}
-
-	if (*++q == ':') {
-		if (*p == '\0' && (p = **optnext) == NULL) {
-			if (optstr[0] == ':') {
-				s[0] = c;
-				s[1] = '\0';
-				newoptarg = s;
-				c = ':';
-			}
-			else {
-				out2fmt_flush("No arg for -%c option\n", c);
-				c = '?';
-			}
-			goto out;
-		}
-
-		if (p == **optnext)
-			(*optnext)++;
-		newoptarg = p;
-		p = NULL;
-	}
-
-out:
-	if (*optnext != NULL)
-		ind = *optnext - optfirst + 1;
-	*optptr = p;
-	if (newoptarg != NULL)
-		err |= setvarsafe("OPTARG", newoptarg, 0);
-	else {
-		INTOFF;
-		err |= unsetvar("OPTARG");
-		INTON;
-	}
-	fmtstr(s, sizeof(s), "%d", ind);
-	err |= setvarsafe("OPTIND", s, VNOFUNC);
-	s[0] = c;
-	s[1] = '\0';
-	err |= setvarsafe(optvar, s, 0);
-	if (err) {
-		*optnext = NULL;
-		*optptr = NULL;
-		flushall();
-		exraise(EXERROR);
-	}
-	return done;
-}
-
-/*
- * Standard option processing (a la getopt) for builtin routines.  The
- * only argument that is passed to nextopt is the option string; the
- * other arguments are unnecessary.  It returns the option, or '\0' on
- * end of input.
- */
-
-int
-nextopt(const char *optstring)
-{
-	char *p;
-	const char *q;
-	char c;
-
-	if ((p = nextopt_optptr) == NULL || *p == '\0') {
-		p = *argptr;
-		if (p == NULL || *p != '-' || *++p == '\0')
-			return '\0';
-		argptr++;
-		if (p[0] == '-' && p[1] == '\0')	/* check for "--" */
-			return '\0';
-	}
-	c = *p++;
-	for (q = optstring ; *q != c ; ) {
-		if (*q == '\0')
-			error("Illegal option -%c", c);
-		if (*++q == ':')
-			q++;
-	}
-	if (*++q == ':') {
-		if (*p == '\0' && (p = *argptr++) == NULL)
-			error("No arg for -%c option", c);
-		shoptarg = p;
-		p = NULL;
-	}
-	nextopt_optptr = p;
-	return c;
-}
diff --git a/bin/1sh/options.h b/bin/1sh/options.h
deleted file mode 100644
index 1242b095..00000000
--- a/bin/1sh/options.h
+++ /dev/null
@@ -1,115 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)options.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/options.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-struct shparam {
-	int nparam;		/* # of positional parameters (without $0) */
-	unsigned char malloc;	/* if parameter list dynamically allocated */
-	unsigned char reset;	/* if getopts has been reset */
-	char **p;		/* parameter list */
-	char **optp;		/* parameter list for getopts */
-	char **optnext;		/* next parameter to be processed by getopts */
-	char *optptr;		/* used by getopts */
-};
-
-
-
-#define eflag optval[0]
-#define fflag optval[1]
-#define Iflag optval[2]
-#define iflag optval[3]
-#define mflag optval[4]
-#define nflag optval[5]
-#define sflag optval[6]
-#define xflag optval[7]
-#define vflag optval[8]
-#define Vflag optval[9]
-#define	Eflag optval[10]
-#define	Cflag optval[11]
-#define	aflag optval[12]
-#define	bflag optval[13]
-#define	uflag optval[14]
-#define	privileged optval[15]
-#define	Tflag optval[16]
-#define	Pflag optval[17]
-#define	hflag optval[18]
-#define	nologflag optval[19]
-
-#define NSHORTOPTS	19
-#define NOPTS		20
-
-extern char optval[NOPTS];
-extern const char optletter[NSHORTOPTS];
-#ifdef DEFINE_OPTIONS
-char optval[NOPTS];
-const char optletter[NSHORTOPTS] = "efIimnsxvVECabupTPh";
-static const unsigned char optname[] =
-	"\007errexit"
-	"\006noglob"
-	"\011ignoreeof"
-	"\013interactive"
-	"\007monitor"
-	"\006noexec"
-	"\005stdin"
-	"\006xtrace"
-	"\007verbose"
-	"\002vi"
-	"\005emacs"
-	"\011noclobber"
-	"\011allexport"
-	"\006notify"
-	"\007nounset"
-	"\012privileged"
-	"\012trapsasync"
-	"\010physical"
-	"\010trackall"
-	"\005nolog"
-;
-#endif
-
-
-extern char *minusc;		/* argument to -c option */
-extern char *arg0;		/* $0 */
-extern struct shparam shellparam;  /* $@ */
-extern char **argptr;		/* argument list for builtin commands */
-extern char *shoptarg;		/* set by nextopt */
-extern char *nextopt_optptr;	/* used by nextopt */
-
-void procargs(int, char **);
-void optschanged(void);
-void freeparam(struct shparam *);
-int nextopt(const char *);
-void getoptsreset(const char *);
diff --git a/bin/1sh/output.c b/bin/1sh/output.c
deleted file mode 100644
index 1eb8b692..00000000
--- a/bin/1sh/output.c
+++ /dev/null
@@ -1,370 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)output.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/output.c 326025 2017-11-20 19:49:47Z pfg $");
-
-/*
- * Shell output routines.  We use our own output routines because:
- *	When a builtin command is interrupted we have to discard
- *		any pending output.
- *	When a builtin command appears in back quotes, we want to
- *		save the output of the command in a region obtained
- *		via malloc, rather than doing a fork and reading the
- *		output of the command via a pipe.
- */
-
-#include <stdio.h>	/* defines BUFSIZ */
-#include <string.h>
-#include <stdarg.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <wchar.h>
-#include <wctype.h>
-
-#include "shell.h"
-#include "syntax.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "var.h"
-
-
-#define OUTBUFSIZ BUFSIZ
-#define MEM_OUT -2		/* output to dynamically allocated memory */
-#define OUTPUT_ERR 01		/* error occurred on output */
-
-static int doformat_wr(void *, const char *, int);
-
-struct output output = {NULL, NULL, NULL, OUTBUFSIZ, 1, 0};
-struct output errout = {NULL, NULL, NULL, 256, 2, 0};
-struct output memout = {NULL, NULL, NULL, 64, MEM_OUT, 0};
-struct output *out1 = &output;
-struct output *out2 = &errout;
-
-void
-outcslow(int c, struct output *file)
-{
-	outc(c, file);
-}
-
-void
-out1str(const char *p)
-{
-	outstr(p, out1);
-}
-
-void
-out1qstr(const char *p)
-{
-	outqstr(p, out1);
-}
-
-void
-out2str(const char *p)
-{
-	outstr(p, out2);
-}
-
-void
-out2qstr(const char *p)
-{
-	outqstr(p, out2);
-}
-
-void
-outstr(const char *p, struct output *file)
-{
-	outbin(p, strlen(p), file);
-}
-
-static void
-byteseq(int ch, struct output *file)
-{
-	char seq[4];
-
-	seq[0] = '\\';
-	seq[1] = (ch >> 6 & 0x3) + '0';
-	seq[2] = (ch >> 3 & 0x7) + '0';
-	seq[3] = (ch & 0x7) + '0';
-	outbin(seq, 4, file);
-}
-
-static void
-outdqstr(const char *p, struct output *file)
-{
-	const char *end;
-	mbstate_t mbs;
-	size_t clen;
-	wchar_t wc;
-
-	memset(&mbs, '\0', sizeof(mbs));
-	end = p + strlen(p);
-	outstr("$'", file);
-	while ((clen = mbrtowc(&wc, p, end - p + 1, &mbs)) != 0) {
-		if (clen == (size_t)-2) {
-			while (p < end)
-				byteseq(*p++, file);
-			break;
-		}
-		if (clen == (size_t)-1) {
-			memset(&mbs, '\0', sizeof(mbs));
-			byteseq(*p++, file);
-			continue;
-		}
-		if (wc == L'\n')
-			outcslow('\n', file), p++;
-		else if (wc == L'\r')
-			outstr("\\r", file), p++;
-		else if (wc == L'\t')
-			outstr("\\t", file), p++;
-		else if (!iswprint(wc)) {
-			for (; clen > 0; clen--)
-				byteseq(*p++, file);
-		} else {
-			if (wc == L'\'' || wc == L'\\')
-				outcslow('\\', file);
-			outbin(p, clen, file);
-			p += clen;
-		}
-	}
-	outcslow('\'', file);
-}
-
-/* Like outstr(), but quote for re-input into the shell. */
-void
-outqstr(const char *p, struct output *file)
-{
-	int i;
-
-	if (p[0] == '\0') {
-		outstr("''", file);
-		return;
-	}
-	for (i = 0; p[i] != '\0'; i++) {
-		if ((p[i] > '\0' && p[i] < ' ' && p[i] != '\n') ||
-		    (p[i] & 0x80) != 0 || p[i] == '\'') {
-			outdqstr(p, file);
-			return;
-		}
-	}
-
-	if (p[strcspn(p, "|&;<>()$`\\\" \n*?[~#=")] == '\0' ||
-			strcmp(p, "[") == 0) {
-		outstr(p, file);
-		return;
-	}
-
-	outcslow('\'', file);
-	outstr(p, file);
-	outcslow('\'', file);
-}
-
-void
-outbin(const void *data, size_t len, struct output *file)
-{
-	const char *p;
-
-	p = data;
-	while (len-- > 0)
-		outc(*p++, file);
-}
-
-void
-emptyoutbuf(struct output *dest)
-{
-	int offset, newsize;
-
-	if (dest->buf == NULL) {
-		INTOFF;
-		dest->buf = ckmalloc(dest->bufsize);
-		dest->nextc = dest->buf;
-		dest->bufend = dest->buf + dest->bufsize;
-		INTON;
-	} else if (dest->fd == MEM_OUT) {
-		offset = dest->nextc - dest->buf;
-		newsize = dest->bufsize << 1;
-		INTOFF;
-		dest->buf = ckrealloc(dest->buf, newsize);
-		dest->bufsize = newsize;
-		dest->bufend = dest->buf + newsize;
-		dest->nextc = dest->buf + offset;
-		INTON;
-	} else {
-		flushout(dest);
-	}
-}
-
-
-void
-flushall(void)
-{
-	flushout(&output);
-	flushout(&errout);
-}
-
-
-void
-flushout(struct output *dest)
-{
-
-	if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0)
-		return;
-	if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
-		dest->flags |= OUTPUT_ERR;
-	dest->nextc = dest->buf;
-}
-
-
-void
-freestdout(void)
-{
-	output.nextc = output.buf;
-}
-
-
-int
-outiserror(struct output *file)
-{
-	return (file->flags & OUTPUT_ERR);
-}
-
-
-void
-outclearerror(struct output *file)
-{
-	file->flags &= ~OUTPUT_ERR;
-}
-
-
-void
-outfmt(struct output *file, const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	doformat(file, fmt, ap);
-	va_end(ap);
-}
-
-
-void
-out1fmt(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	doformat(out1, fmt, ap);
-	va_end(ap);
-}
-
-void
-out2fmt_flush(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	doformat(out2, fmt, ap);
-	va_end(ap);
-	flushout(out2);
-}
-
-void
-fmtstr(char *outbuf, int length, const char *fmt, ...)
-{
-	va_list ap;
-
-	INTOFF;
-	va_start(ap, fmt);
-	vsnprintf(outbuf, length, fmt, ap);
-	va_end(ap);
-	INTON;
-}
-
-static int
-doformat_wr(void *cookie, const char *buf, int len)
-{
-	struct output *o;
-
-	o = (struct output *)cookie;
-	outbin(buf, len, o);
-
-	return (len);
-}
-
-void
-doformat(struct output *dest, const char *f, va_list ap)
-{
-	FILE *fp;
-
-	if ((fp = fwopen(dest, doformat_wr)) != NULL) {
-		vfprintf(fp, f, ap);
-		fclose(fp);
-	}
-}
-
-/*
- * Version of write which resumes after a signal is caught.
- */
-
-int
-xwrite(int fd, const char *buf, int nbytes)
-{
-	int ntry;
-	int i;
-	int n;
-
-	n = nbytes;
-	ntry = 0;
-	for (;;) {
-		i = write(fd, buf, n);
-		if (i > 0) {
-			if ((n -= i) <= 0)
-				return nbytes;
-			buf += i;
-			ntry = 0;
-		} else if (i == 0) {
-			if (++ntry > 10)
-				return nbytes - n;
-		} else if (errno != EINTR) {
-			return -1;
-		}
-	}
-}
diff --git a/bin/1sh/output.h b/bin/1sh/output.h
deleted file mode 100644
index 511c7078..00000000
--- a/bin/1sh/output.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)output.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/output.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-#ifndef OUTPUT_INCL
-
-#include <stdarg.h>
-#include <stddef.h>
-
-struct output {
-	char *nextc;
-	char *bufend;
-	char *buf;
-	int bufsize;
-	short fd;
-	short flags;
-};
-
-extern struct output output; /* to fd 1 */
-extern struct output errout; /* to fd 2 */
-extern struct output memout;
-extern struct output *out1; /* &memout if backquote, otherwise &output */
-extern struct output *out2; /* &memout if backquote with 2>&1, otherwise
-			       &errout */
-
-void outcslow(int, struct output *);
-void out1str(const char *);
-void out1qstr(const char *);
-void out2str(const char *);
-void out2qstr(const char *);
-void outstr(const char *, struct output *);
-void outqstr(const char *, struct output *);
-void outbin(const void *, size_t, struct output *);
-void emptyoutbuf(struct output *);
-void flushall(void);
-void flushout(struct output *);
-void freestdout(void);
-int outiserror(struct output *);
-void outclearerror(struct output *);
-void outfmt(struct output *, const char *, ...) __printflike(2, 3);
-void out1fmt(const char *, ...) __printflike(1, 2);
-void out2fmt_flush(const char *, ...) __printflike(1, 2);
-void fmtstr(char *, int, const char *, ...) __printflike(3, 4);
-void doformat(struct output *, const char *, va_list) __printflike(2, 0);
-int xwrite(int, const char *, int);
-
-#define outc(c, file)	((file)->nextc == (file)->bufend ? (emptyoutbuf(file), *(file)->nextc++ = (c)) : (*(file)->nextc++ = (c)))
-#define out1c(c)	outc(c, out1);
-#define out2c(c)	outcslow(c, out2);
-
-#define OUTPUT_INCL
-#endif
diff --git a/bin/1sh/parser.c b/bin/1sh/parser.c
deleted file mode 100644
index a7b86aab..00000000
--- a/bin/1sh/parser.c
+++ /dev/null
@@ -1,2182 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)parser.c	8.7 (Berkeley) 5/16/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/parser.c 334008 2018-05-21 21:52:48Z jilles $");
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-
-#include "shell.h"
-#include "parser.h"
-#include "nodes.h"
-#include "expand.h"	/* defines rmescapes() */
-#include "syntax.h"
-#include "options.h"
-#include "input.h"
-#include "output.h"
-#include "var.h"
-#include "error.h"
-#include "memalloc.h"
-#include "mystring.h"
-#include "alias.h"
-#include "show.h"
-#include "eval.h"
-#include "exec.h"	/* to check for special builtins */
-#ifndef NO_HISTORY
-#include "myhistedit.h"
-#endif
-
-/*
- * Shell command parser.
- */
-
-#define	PROMPTLEN	128
-
-/* values of checkkwd variable */
-#define CHKALIAS	0x1
-#define CHKKWD		0x2
-#define CHKNL		0x4
-
-/* values returned by readtoken */
-#include "token.h"
-
-
-
-struct heredoc {
-	struct heredoc *next;	/* next here document in list */
-	union node *here;		/* redirection node */
-	char *eofmark;		/* string indicating end of input */
-	int striptabs;		/* if set, strip leading tabs */
-};
-
-struct parser_temp {
-	struct parser_temp *next;
-	void *data;
-};
-
-
-static struct heredoc *heredoclist;	/* list of here documents to read */
-static int doprompt;		/* if set, prompt the user */
-static int needprompt;		/* true if interactive and at start of line */
-static int lasttoken;		/* last token read */
-static int tokpushback;		/* last token pushed back */
-static char *wordtext;		/* text of last word returned by readtoken */
-static int checkkwd;
-static struct nodelist *backquotelist;
-static union node *redirnode;
-static struct heredoc *heredoc;
-static int quoteflag;		/* set if (part of) last token was quoted */
-static int startlinno;		/* line # where last token started */
-static int funclinno;		/* line # where the current function started */
-static struct parser_temp *parser_temp;
-
-#define NOEOFMARK ((const char *)&heredoclist)
-
-
-static union node *list(int);
-static union node *andor(void);
-static union node *pipeline(void);
-static union node *command(void);
-static union node *simplecmd(union node **, union node *);
-static union node *makename(void);
-static union node *makebinary(int type, union node *n1, union node *n2);
-static void parsefname(void);
-static void parseheredoc(void);
-static int peektoken(void);
-static int readtoken(void);
-static int xxreadtoken(void);
-static int readtoken1(int, const char *, const char *, int);
-static int noexpand(char *);
-static void consumetoken(int);
-static void synexpect(int) __dead2;
-static void synerror(const char *) __dead2;
-static void setprompt(int);
-static char *expandprompt(const char *);
-static int pgetc_linecont(void);
-
-
-static void *
-parser_temp_alloc(size_t len)
-{
-	struct parser_temp *t;
-
-	INTOFF;
-	t = ckmalloc(sizeof(*t));
-	t->data = NULL;
-	t->next = parser_temp;
-	parser_temp = t;
-	t->data = ckmalloc(len);
-	INTON;
-	return t->data;
-}
-
-
-static void *
-parser_temp_realloc(void *ptr, size_t len)
-{
-	struct parser_temp *t;
-
-	INTOFF;
-	t = parser_temp;
-	if (ptr != t->data)
-		error("bug: parser_temp_realloc misused");
-	t->data = ckrealloc(t->data, len);
-	INTON;
-	return t->data;
-}
-
-
-static void
-parser_temp_free_upto(void *ptr)
-{
-	struct parser_temp *t;
-	int done = 0;
-
-	INTOFF;
-	while (parser_temp != NULL && !done) {
-		t = parser_temp;
-		parser_temp = t->next;
-		done = t->data == ptr;
-		ckfree(t->data);
-		ckfree(t);
-	}
-	INTON;
-	if (!done)
-		error("bug: parser_temp_free_upto misused");
-}
-
-
-static void
-parser_temp_free_all(void)
-{
-	struct parser_temp *t;
-
-	INTOFF;
-	while (parser_temp != NULL) {
-		t = parser_temp;
-		parser_temp = t->next;
-		ckfree(t->data);
-		ckfree(t);
-	}
-	INTON;
-}
-
-
-/*
- * Read and parse a command.  Returns NEOF on end of file.  (NULL is a
- * valid parse tree indicating a blank line.)
- */
-
-union node *
-parsecmd(int interact)
-{
-	int t;
-
-	/* This assumes the parser is not re-entered,
-	 * which could happen if we add command substitution on PS1/PS2.
-	 */
-	parser_temp_free_all();
-	heredoclist = NULL;
-
-	tokpushback = 0;
-	checkkwd = 0;
-	doprompt = interact;
-	if (doprompt)
-		setprompt(1);
-	else
-		setprompt(0);
-	needprompt = 0;
-	t = readtoken();
-	if (t == TEOF)
-		return NEOF;
-	if (t == TNL)
-		return NULL;
-	tokpushback++;
-	return list(1);
-}
-
-
-/*
- * Read and parse words for wordexp.
- * Returns a list of NARG nodes; NULL if there are no words.
- */
-union node *
-parsewordexp(void)
-{
-	union node *n, *first = NULL, **pnext;
-	int t;
-
-	/* This assumes the parser is not re-entered,
-	 * which could happen if we add command substitution on PS1/PS2.
-	 */
-	parser_temp_free_all();
-	heredoclist = NULL;
-
-	tokpushback = 0;
-	checkkwd = 0;
-	doprompt = 0;
-	setprompt(0);
-	needprompt = 0;
-	pnext = &first;
-	while ((t = readtoken()) != TEOF) {
-		if (t != TWORD)
-			synexpect(TWORD);
-		n = makename();
-		*pnext = n;
-		pnext = &n->narg.next;
-	}
-	return first;
-}
-
-
-static union node *
-list(int nlflag)
-{
-	union node *ntop, *n1, *n2, *n3;
-	int tok;
-
-	checkkwd = CHKNL | CHKKWD | CHKALIAS;
-	if (!nlflag && tokendlist[peektoken()])
-		return NULL;
-	ntop = n1 = NULL;
-	for (;;) {
-		n2 = andor();
-		tok = readtoken();
-		if (tok == TBACKGND) {
-			if (n2 != NULL && n2->type == NPIPE) {
-				n2->npipe.backgnd = 1;
-			} else if (n2 != NULL && n2->type == NREDIR) {
-				n2->type = NBACKGND;
-			} else {
-				n3 = (union node *)stalloc(sizeof (struct nredir));
-				n3->type = NBACKGND;
-				n3->nredir.n = n2;
-				n3->nredir.redirect = NULL;
-				n2 = n3;
-			}
-		}
-		if (ntop == NULL)
-			ntop = n2;
-		else if (n1 == NULL) {
-			n1 = makebinary(NSEMI, ntop, n2);
-			ntop = n1;
-		}
-		else {
-			n3 = makebinary(NSEMI, n1->nbinary.ch2, n2);
-			n1->nbinary.ch2 = n3;
-			n1 = n3;
-		}
-		switch (tok) {
-		case TBACKGND:
-		case TSEMI:
-			tok = readtoken();
-			/* FALLTHROUGH */
-		case TNL:
-			if (tok == TNL) {
-				parseheredoc();
-				if (nlflag)
-					return ntop;
-			} else if (tok == TEOF && nlflag) {
-				parseheredoc();
-				return ntop;
-			} else {
-				tokpushback++;
-			}
-			checkkwd = CHKNL | CHKKWD | CHKALIAS;
-			if (!nlflag && tokendlist[peektoken()])
-				return ntop;
-			break;
-		case TEOF:
-			if (heredoclist)
-				parseheredoc();
-			else
-				pungetc();		/* push back EOF on input */
-			return ntop;
-		default:
-			if (nlflag)
-				synexpect(-1);
-			tokpushback++;
-			return ntop;
-		}
-	}
-}
-
-
-
-static union node *
-andor(void)
-{
-	union node *n;
-	int t;
-
-	n = pipeline();
-	for (;;) {
-		if ((t = readtoken()) == TAND) {
-			t = NAND;
-		} else if (t == TOR) {
-			t = NOR;
-		} else {
-			tokpushback++;
-			return n;
-		}
-		n = makebinary(t, n, pipeline());
-	}
-}
-
-
-
-static union node *
-pipeline(void)
-{
-	union node *n1, *n2, *pipenode;
-	struct nodelist *lp, *prev;
-	int negate, t;
-
-	negate = 0;
-	checkkwd = CHKNL | CHKKWD | CHKALIAS;
-	TRACE(("pipeline: entered\n"));
-	while (readtoken() == TNOT)
-		negate = !negate;
-	tokpushback++;
-	n1 = command();
-	if (readtoken() == TPIPE) {
-		pipenode = (union node *)stalloc(sizeof (struct npipe));
-		pipenode->type = NPIPE;
-		pipenode->npipe.backgnd = 0;
-		lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
-		pipenode->npipe.cmdlist = lp;
-		lp->n = n1;
-		do {
-			prev = lp;
-			lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
-			checkkwd = CHKNL | CHKKWD | CHKALIAS;
-			t = readtoken();
-			tokpushback++;
-			if (t == TNOT)
-				lp->n = pipeline();
-			else
-				lp->n = command();
-			prev->next = lp;
-		} while (readtoken() == TPIPE);
-		lp->next = NULL;
-		n1 = pipenode;
-	}
-	tokpushback++;
-	if (negate) {
-		n2 = (union node *)stalloc(sizeof (struct nnot));
-		n2->type = NNOT;
-		n2->nnot.com = n1;
-		return n2;
-	} else
-		return n1;
-}
-
-
-
-static union node *
-command(void)
-{
-	union node *n1, *n2;
-	union node *ap, **app;
-	union node *cp, **cpp;
-	union node *redir, **rpp;
-	int t;
-	int is_subshell;
-
-	checkkwd = CHKNL | CHKKWD | CHKALIAS;
-	is_subshell = 0;
-	redir = NULL;
-	n1 = NULL;
-	rpp = &redir;
-
-	/* Check for redirection which may precede command */
-	while (readtoken() == TREDIR) {
-		*rpp = n2 = redirnode;
-		rpp = &n2->nfile.next;
-		parsefname();
-	}
-	tokpushback++;
-
-	switch (readtoken()) {
-	case TIF:
-		n1 = (union node *)stalloc(sizeof (struct nif));
-		n1->type = NIF;
-		if ((n1->nif.test = list(0)) == NULL)
-			synexpect(-1);
-		consumetoken(TTHEN);
-		n1->nif.ifpart = list(0);
-		n2 = n1;
-		while (readtoken() == TELIF) {
-			n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif));
-			n2 = n2->nif.elsepart;
-			n2->type = NIF;
-			if ((n2->nif.test = list(0)) == NULL)
-				synexpect(-1);
-			consumetoken(TTHEN);
-			n2->nif.ifpart = list(0);
-		}
-		if (lasttoken == TELSE)
-			n2->nif.elsepart = list(0);
-		else {
-			n2->nif.elsepart = NULL;
-			tokpushback++;
-		}
-		consumetoken(TFI);
-		checkkwd = CHKKWD | CHKALIAS;
-		break;
-	case TWHILE:
-	case TUNTIL:
-		t = lasttoken;
-		if ((n1 = list(0)) == NULL)
-			synexpect(-1);
-		consumetoken(TDO);
-		n1 = makebinary((t == TWHILE)? NWHILE : NUNTIL, n1, list(0));
-		consumetoken(TDONE);
-		checkkwd = CHKKWD | CHKALIAS;
-		break;
-	case TFOR:
-		if (readtoken() != TWORD || quoteflag || ! goodname(wordtext))
-			synerror("Bad for loop variable");
-		n1 = (union node *)stalloc(sizeof (struct nfor));
-		n1->type = NFOR;
-		n1->nfor.var = wordtext;
-		while (readtoken() == TNL)
-			;
-		if (lasttoken == TWORD && ! quoteflag && equal(wordtext, "in")) {
-			app = &ap;
-			while (readtoken() == TWORD) {
-				n2 = makename();
-				*app = n2;
-				app = &n2->narg.next;
-			}
-			*app = NULL;
-			n1->nfor.args = ap;
-			if (lasttoken != TNL && lasttoken != TSEMI)
-				synexpect(-1);
-		} else {
-			static char argvars[5] = {
-				CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0'
-			};
-			n2 = (union node *)stalloc(sizeof (struct narg));
-			n2->type = NARG;
-			n2->narg.text = argvars;
-			n2->narg.backquote = NULL;
-			n2->narg.next = NULL;
-			n1->nfor.args = n2;
-			/*
-			 * Newline or semicolon here is optional (but note
-			 * that the original Bourne shell only allowed NL).
-			 */
-			if (lasttoken != TNL && lasttoken != TSEMI)
-				tokpushback++;
-		}
-		checkkwd = CHKNL | CHKKWD | CHKALIAS;
-		if ((t = readtoken()) == TDO)
-			t = TDONE;
-		else if (t == TBEGIN)
-			t = TEND;
-		else
-			synexpect(-1);
-		n1->nfor.body = list(0);
-		consumetoken(t);
-		checkkwd = CHKKWD | CHKALIAS;
-		break;
-	case TCASE:
-		n1 = (union node *)stalloc(sizeof (struct ncase));
-		n1->type = NCASE;
-		consumetoken(TWORD);
-		n1->ncase.expr = makename();
-		while (readtoken() == TNL);
-		if (lasttoken != TWORD || ! equal(wordtext, "in"))
-			synerror("expecting \"in\"");
-		cpp = &n1->ncase.cases;
-		checkkwd = CHKNL | CHKKWD, readtoken();
-		while (lasttoken != TESAC) {
-			*cpp = cp = (union node *)stalloc(sizeof (struct nclist));
-			cp->type = NCLIST;
-			app = &cp->nclist.pattern;
-			if (lasttoken == TLP)
-				readtoken();
-			for (;;) {
-				*app = ap = makename();
-				checkkwd = CHKNL | CHKKWD;
-				if (readtoken() != TPIPE)
-					break;
-				app = &ap->narg.next;
-				readtoken();
-			}
-			ap->narg.next = NULL;
-			if (lasttoken != TRP)
-				synexpect(TRP);
-			cp->nclist.body = list(0);
-
-			checkkwd = CHKNL | CHKKWD | CHKALIAS;
-			if ((t = readtoken()) != TESAC) {
-				if (t == TENDCASE)
-					;
-				else if (t == TFALLTHRU)
-					cp->type = NCLISTFALLTHRU;
-				else
-					synexpect(TENDCASE);
-				checkkwd = CHKNL | CHKKWD, readtoken();
-			}
-			cpp = &cp->nclist.next;
-		}
-		*cpp = NULL;
-		checkkwd = CHKKWD | CHKALIAS;
-		break;
-	case TLP:
-		n1 = (union node *)stalloc(sizeof (struct nredir));
-		n1->type = NSUBSHELL;
-		n1->nredir.n = list(0);
-		n1->nredir.redirect = NULL;
-		consumetoken(TRP);
-		checkkwd = CHKKWD | CHKALIAS;
-		is_subshell = 1;
-		break;
-	case TBEGIN:
-		n1 = list(0);
-		consumetoken(TEND);
-		checkkwd = CHKKWD | CHKALIAS;
-		break;
-	/* A simple command must have at least one redirection or word. */
-	case TBACKGND:
-	case TSEMI:
-	case TAND:
-	case TOR:
-	case TPIPE:
-	case TENDCASE:
-	case TFALLTHRU:
-	case TEOF:
-	case TNL:
-	case TRP:
-		if (!redir)
-			synexpect(-1);
-	case TWORD:
-		tokpushback++;
-		n1 = simplecmd(rpp, redir);
-		return n1;
-	default:
-		synexpect(-1);
-	}
-
-	/* Now check for redirection which may follow command */
-	while (readtoken() == TREDIR) {
-		*rpp = n2 = redirnode;
-		rpp = &n2->nfile.next;
-		parsefname();
-	}
-	tokpushback++;
-	*rpp = NULL;
-	if (redir) {
-		if (!is_subshell) {
-			n2 = (union node *)stalloc(sizeof (struct nredir));
-			n2->type = NREDIR;
-			n2->nredir.n = n1;
-			n1 = n2;
-		}
-		n1->nredir.redirect = redir;
-	}
-
-	return n1;
-}
-
-
-static union node *
-simplecmd(union node **rpp, union node *redir)
-{
-	union node *args, **app;
-	union node **orig_rpp = rpp;
-	union node *n = NULL;
-	int special;
-	int savecheckkwd;
-
-	/* If we don't have any redirections already, then we must reset */
-	/* rpp to be the address of the local redir variable.  */
-	if (redir == NULL)
-		rpp = &redir;
-
-	args = NULL;
-	app = &args;
-	/*
-	 * We save the incoming value, because we need this for shell
-	 * functions.  There can not be a redirect or an argument between
-	 * the function name and the open parenthesis.
-	 */
-	orig_rpp = rpp;
-
-	savecheckkwd = CHKALIAS;
-
-	for (;;) {
-		checkkwd = savecheckkwd;
-		if (readtoken() == TWORD) {
-			n = makename();
-			*app = n;
-			app = &n->narg.next;
-			if (savecheckkwd != 0 && !isassignment(wordtext))
-				savecheckkwd = 0;
-		} else if (lasttoken == TREDIR) {
-			*rpp = n = redirnode;
-			rpp = &n->nfile.next;
-			parsefname();	/* read name of redirection file */
-		} else if (lasttoken == TLP && app == &args->narg.next
-					    && rpp == orig_rpp) {
-			/* We have a function */
-			consumetoken(TRP);
-			funclinno = plinno;
-			/*
-			 * - Require plain text.
-			 * - Functions with '/' cannot be called.
-			 * - Reject name=().
-			 * - Reject ksh extended glob patterns.
-			 */
-			if (!noexpand(n->narg.text) || quoteflag ||
-			    strchr(n->narg.text, '/') ||
-			    strchr("!%*+-=?@}~",
-				n->narg.text[strlen(n->narg.text) - 1]))
-				synerror("Bad function name");
-			rmescapes(n->narg.text);
-			if (find_builtin(n->narg.text, &special) >= 0 &&
-			    special)
-				synerror("Cannot override a special builtin with a function");
-			n->type = NDEFUN;
-			n->narg.next = command();
-			funclinno = 0;
-			return n;
-		} else {
-			tokpushback++;
-			break;
-		}
-	}
-	*app = NULL;
-	*rpp = NULL;
-	n = (union node *)stalloc(sizeof (struct ncmd));
-	n->type = NCMD;
-	n->ncmd.args = args;
-	n->ncmd.redirect = redir;
-	return n;
-}
-
-static union node *
-makename(void)
-{
-	union node *n;
-
-	n = (union node *)stalloc(sizeof (struct narg));
-	n->type = NARG;
-	n->narg.next = NULL;
-	n->narg.text = wordtext;
-	n->narg.backquote = backquotelist;
-	return n;
-}
-
-static union node *
-makebinary(int type, union node *n1, union node *n2)
-{
-	union node *n;
-
-	n = (union node *)stalloc(sizeof (struct nbinary));
-	n->type = type;
-	n->nbinary.ch1 = n1;
-	n->nbinary.ch2 = n2;
-	return (n);
-}
-
-void
-forcealias(void)
-{
-	checkkwd |= CHKALIAS;
-}
-
-void
-fixredir(union node *n, const char *text, int err)
-{
-	TRACE(("Fix redir %s %d\n", text, err));
-	if (!err)
-		n->ndup.vname = NULL;
-
-	if (is_digit(text[0]) && text[1] == '\0')
-		n->ndup.dupfd = digit_val(text[0]);
-	else if (text[0] == '-' && text[1] == '\0')
-		n->ndup.dupfd = -1;
-	else {
-
-		if (err)
-			synerror("Bad fd number");
-		else
-			n->ndup.vname = makename();
-	}
-}
-
-
-static void
-parsefname(void)
-{
-	union node *n = redirnode;
-
-	consumetoken(TWORD);
-	if (n->type == NHERE) {
-		struct heredoc *here = heredoc;
-		struct heredoc *p;
-
-		if (quoteflag == 0)
-			n->type = NXHERE;
-		TRACE(("Here document %d\n", n->type));
-		if (here->striptabs) {
-			while (*wordtext == '\t')
-				wordtext++;
-		}
-		if (! noexpand(wordtext))
-			synerror("Illegal eof marker for << redirection");
-		rmescapes(wordtext);
-		here->eofmark = wordtext;
-		here->next = NULL;
-		if (heredoclist == NULL)
-			heredoclist = here;
-		else {
-			for (p = heredoclist ; p->next ; p = p->next);
-			p->next = here;
-		}
-	} else if (n->type == NTOFD || n->type == NFROMFD) {
-		fixredir(n, wordtext, 0);
-	} else {
-		n->nfile.fname = makename();
-	}
-}
-
-
-/*
- * Input any here documents.
- */
-
-static void
-parseheredoc(void)
-{
-	struct heredoc *here;
-	union node *n;
-
-	while (heredoclist) {
-		here = heredoclist;
-		heredoclist = here->next;
-		if (needprompt) {
-			setprompt(2);
-			needprompt = 0;
-		}
-		readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
-				here->eofmark, here->striptabs);
-		n = makename();
-		here->here->nhere.doc = n;
-	}
-}
-
-static int
-peektoken(void)
-{
-	int t;
-
-	t = readtoken();
-	tokpushback++;
-	return (t);
-}
-
-static int
-readtoken(void)
-{
-	int t;
-	struct alias *ap;
-#ifdef DEBUG
-	int alreadyseen = tokpushback;
-#endif
-
-	top:
-	t = xxreadtoken();
-
-	/*
-	 * eat newlines
-	 */
-	if (checkkwd & CHKNL) {
-		while (t == TNL) {
-			parseheredoc();
-			t = xxreadtoken();
-		}
-	}
-
-	/*
-	 * check for keywords and aliases
-	 */
-	if (t == TWORD && !quoteflag)
-	{
-		const char * const *pp;
-
-		if (checkkwd & CHKKWD)
-			for (pp = parsekwd; *pp; pp++) {
-				if (**pp == *wordtext && equal(*pp, wordtext))
-				{
-					lasttoken = t = pp - parsekwd + KWDOFFSET;
-					TRACE(("keyword %s recognized\n", tokname[t]));
-					goto out;
-				}
-			}
-		if (checkkwd & CHKALIAS &&
-		    (ap = lookupalias(wordtext, 1)) != NULL) {
-			pushstring(ap->val, strlen(ap->val), ap);
-			goto top;
-		}
-	}
-out:
-	if (t != TNOT)
-		checkkwd = 0;
-
-#ifdef DEBUG
-	if (!alreadyseen)
-	    TRACE(("token %s %s\n", tokname[t], t == TWORD ? wordtext : ""));
-	else
-	    TRACE(("reread token %s %s\n", tokname[t], t == TWORD ? wordtext : ""));
-#endif
-	return (t);
-}
-
-
-/*
- * Read the next input token.
- * If the token is a word, we set backquotelist to the list of cmds in
- *	backquotes.  We set quoteflag to true if any part of the word was
- *	quoted.
- * If the token is TREDIR, then we set redirnode to a structure containing
- *	the redirection.
- * In all cases, the variable startlinno is set to the number of the line
- *	on which the token starts.
- *
- * [Change comment:  here documents and internal procedures]
- * [Readtoken shouldn't have any arguments.  Perhaps we should make the
- *  word parsing code into a separate routine.  In this case, readtoken
- *  doesn't need to have any internal procedures, but parseword does.
- *  We could also make parseoperator in essence the main routine, and
- *  have parseword (readtoken1?) handle both words and redirection.]
- */
-
-#define RETURN(token)	return lasttoken = token
-
-static int
-xxreadtoken(void)
-{
-	int c;
-
-	if (tokpushback) {
-		tokpushback = 0;
-		return lasttoken;
-	}
-	if (needprompt) {
-		setprompt(2);
-		needprompt = 0;
-	}
-	startlinno = plinno;
-	for (;;) {	/* until token or start of word found */
-		c = pgetc_macro();
-		switch (c) {
-		case ' ': case '\t':
-			continue;
-		case '#':
-			while ((c = pgetc()) != '\n' && c != PEOF);
-			pungetc();
-			continue;
-		case '\\':
-			if (pgetc() == '\n') {
-				startlinno = ++plinno;
-				if (doprompt)
-					setprompt(2);
-				else
-					setprompt(0);
-				continue;
-			}
-			pungetc();
-			/* FALLTHROUGH */
-		default:
-			return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
-		case '\n':
-			plinno++;
-			needprompt = doprompt;
-			RETURN(TNL);
-		case PEOF:
-			RETURN(TEOF);
-		case '&':
-			if (pgetc_linecont() == '&')
-				RETURN(TAND);
-			pungetc();
-			RETURN(TBACKGND);
-		case '|':
-			if (pgetc_linecont() == '|')
-				RETURN(TOR);
-			pungetc();
-			RETURN(TPIPE);
-		case ';':
-			c = pgetc_linecont();
-			if (c == ';')
-				RETURN(TENDCASE);
-			else if (c == '&')
-				RETURN(TFALLTHRU);
-			pungetc();
-			RETURN(TSEMI);
-		case '(':
-			RETURN(TLP);
-		case ')':
-			RETURN(TRP);
-		}
-	}
-#undef RETURN
-}
-
-
-#define MAXNEST_static 8
-struct tokenstate
-{
-	const char *syntax; /* *SYNTAX */
-	int parenlevel; /* levels of parentheses in arithmetic */
-	enum tokenstate_category
-	{
-		TSTATE_TOP,
-		TSTATE_VAR_OLD, /* ${var+-=?}, inherits dquotes */
-		TSTATE_VAR_NEW, /* other ${var...}, own dquote state */
-		TSTATE_ARITH
-	} category;
-};
-
-
-/*
- * Check to see whether we are at the end of the here document.  When this
- * is called, c is set to the first character of the next input line.  If
- * we are at the end of the here document, this routine sets the c to PEOF.
- * The new value of c is returned.
- */
-
-static int
-checkend(int c, const char *eofmark, int striptabs)
-{
-	if (striptabs) {
-		while (c == '\t')
-			c = pgetc();
-	}
-	if (c == *eofmark) {
-		int c2;
-		const char *q;
-
-		for (q = eofmark + 1; c2 = pgetc(), *q != '\0' && c2 == *q; q++)
-			;
-		if ((c2 == PEOF || c2 == '\n') && *q == '\0') {
-			c = PEOF;
-			if (c2 == '\n') {
-				plinno++;
-				needprompt = doprompt;
-			}
-		} else {
-			pungetc();
-			pushstring(eofmark + 1, q - (eofmark + 1), NULL);
-		}
-	} else if (c == '\n' && *eofmark == '\0') {
-		c = PEOF;
-		plinno++;
-		needprompt = doprompt;
-	}
-	return (c);
-}
-
-
-/*
- * Parse a redirection operator.  The variable "out" points to a string
- * specifying the fd to be redirected.  The variable "c" contains the
- * first character of the redirection operator.
- */
-
-static void
-parseredir(char *out, int c)
-{
-	char fd = *out;
-	union node *np;
-
-	np = (union node *)stalloc(sizeof (struct nfile));
-	if (c == '>') {
-		np->nfile.fd = 1;
-		c = pgetc_linecont();
-		if (c == '>')
-			np->type = NAPPEND;
-		else if (c == '&')
-			np->type = NTOFD;
-		else if (c == '|')
-			np->type = NCLOBBER;
-		else {
-			np->type = NTO;
-			pungetc();
-		}
-	} else {	/* c == '<' */
-		np->nfile.fd = 0;
-		c = pgetc_linecont();
-		if (c == '<') {
-			if (sizeof (struct nfile) != sizeof (struct nhere)) {
-				np = (union node *)stalloc(sizeof (struct nhere));
-				np->nfile.fd = 0;
-			}
-			np->type = NHERE;
-			heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
-			heredoc->here = np;
-			if ((c = pgetc_linecont()) == '-') {
-				heredoc->striptabs = 1;
-			} else {
-				heredoc->striptabs = 0;
-				pungetc();
-			}
-		} else if (c == '&')
-			np->type = NFROMFD;
-		else if (c == '>')
-			np->type = NFROMTO;
-		else {
-			np->type = NFROM;
-			pungetc();
-		}
-	}
-	if (fd != '\0')
-		np->nfile.fd = digit_val(fd);
-	redirnode = np;
-}
-
-/*
- * Called to parse command substitutions.
- */
-
-static char *
-parsebackq(char *out, struct nodelist **pbqlist,
-		int oldstyle, int dblquote, int quoted)
-{
-	struct nodelist **nlpp;
-	union node *n;
-	char *volatile str;
-	struct jmploc jmploc;
-	struct jmploc *const savehandler = handler;
-	size_t savelen;
-	int saveprompt;
-	const int bq_startlinno = plinno;
-	char *volatile ostr = NULL;
-	struct parsefile *const savetopfile = getcurrentfile();
-	struct heredoc *const saveheredoclist = heredoclist;
-	struct heredoc *here;
-
-	str = NULL;
-	if (setjmp(jmploc.loc)) {
-		popfilesupto(savetopfile);
-		if (str)
-			ckfree(str);
-		if (ostr)
-			ckfree(ostr);
-		heredoclist = saveheredoclist;
-		handler = savehandler;
-		if (exception == EXERROR) {
-			startlinno = bq_startlinno;
-			synerror("Error in command substitution");
-		}
-		longjmp(handler->loc, 1);
-	}
-	INTOFF;
-	savelen = out - stackblock();
-	if (savelen > 0) {
-		str = ckmalloc(savelen);
-		memcpy(str, stackblock(), savelen);
-	}
-	handler = &jmploc;
-	heredoclist = NULL;
-	INTON;
-        if (oldstyle) {
-                /* We must read until the closing backquote, giving special
-                   treatment to some slashes, and then push the string and
-                   reread it as input, interpreting it normally.  */
-                char *oout;
-                int c;
-                int olen;
-
-
-                STARTSTACKSTR(oout);
-		for (;;) {
-			if (needprompt) {
-				setprompt(2);
-				needprompt = 0;
-			}
-			CHECKSTRSPACE(2, oout);
-			c = pgetc_linecont();
-			if (c == '`')
-				break;
-			switch (c) {
-			case '\\':
-				c = pgetc();
-                                if (c != '\\' && c != '`' && c != '$'
-                                    && (!dblquote || c != '"'))
-                                        USTPUTC('\\', oout);
-				break;
-
-			case '\n':
-				plinno++;
-				needprompt = doprompt;
-				break;
-
-			case PEOF:
-			        startlinno = plinno;
-				synerror("EOF in backquote substitution");
- 				break;
-
-			default:
-				break;
-			}
-			USTPUTC(c, oout);
-                }
-                USTPUTC('\0', oout);
-                olen = oout - stackblock();
-		INTOFF;
-		ostr = ckmalloc(olen);
-		memcpy(ostr, stackblock(), olen);
-		setinputstring(ostr, 1);
-		INTON;
-        }
-	nlpp = pbqlist;
-	while (*nlpp)
-		nlpp = &(*nlpp)->next;
-	*nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
-	(*nlpp)->next = NULL;
-
-	if (oldstyle) {
-		saveprompt = doprompt;
-		doprompt = 0;
-	}
-
-	n = list(0);
-
-	if (oldstyle) {
-		if (peektoken() != TEOF)
-			synexpect(-1);
-		doprompt = saveprompt;
-	} else
-		consumetoken(TRP);
-
-	(*nlpp)->n = n;
-        if (oldstyle) {
-		/*
-		 * Start reading from old file again, ignoring any pushed back
-		 * tokens left from the backquote parsing
-		 */
-                popfile();
-		tokpushback = 0;
-	}
-	STARTSTACKSTR(out);
-	CHECKSTRSPACE(savelen + 1, out);
-	INTOFF;
-	if (str) {
-		memcpy(out, str, savelen);
-		STADJUST(savelen, out);
-		ckfree(str);
-		str = NULL;
-	}
-	if (ostr) {
-		ckfree(ostr);
-		ostr = NULL;
-	}
-	here = saveheredoclist;
-	if (here != NULL) {
-		while (here->next != NULL)
-			here = here->next;
-		here->next = heredoclist;
-		heredoclist = saveheredoclist;
-	}
-	handler = savehandler;
-	INTON;
-	if (quoted)
-		USTPUTC(CTLBACKQ | CTLQUOTE, out);
-	else
-		USTPUTC(CTLBACKQ, out);
-	return out;
-}
-
-
-/*
- * Called to parse a backslash escape sequence inside $'...'.
- * The backslash has already been read.
- */
-static char *
-readcstyleesc(char *out)
-{
-	int c, vc, i, n;
-	unsigned int v;
-
-	c = pgetc();
-	switch (c) {
-	case '\0':
-		synerror("Unterminated quoted string");
-	case '\n':
-		plinno++;
-		if (doprompt)
-			setprompt(2);
-		else
-			setprompt(0);
-		return out;
-	case '\\':
-	case '\'':
-	case '"':
-		v = c;
-		break;
-	case 'a': v = '\a'; break;
-	case 'b': v = '\b'; break;
-	case 'e': v = '\033'; break;
-	case 'f': v = '\f'; break;
-	case 'n': v = '\n'; break;
-	case 'r': v = '\r'; break;
-	case 't': v = '\t'; break;
-	case 'v': v = '\v'; break;
-	case 'x':
-		  v = 0;
-		  for (;;) {
-			  c = pgetc();
-			  if (c >= '0' && c <= '9')
-				  v = (v << 4) + c - '0';
-			  else if (c >= 'A' && c <= 'F')
-				  v = (v << 4) + c - 'A' + 10;
-			  else if (c >= 'a' && c <= 'f')
-				  v = (v << 4) + c - 'a' + 10;
-			  else
-				  break;
-		  }
-		  pungetc();
-		  break;
-	case '0': case '1': case '2': case '3':
-	case '4': case '5': case '6': case '7':
-		  v = c - '0';
-		  c = pgetc();
-		  if (c >= '0' && c <= '7') {
-			  v <<= 3;
-			  v += c - '0';
-			  c = pgetc();
-			  if (c >= '0' && c <= '7') {
-				  v <<= 3;
-				  v += c - '0';
-			  } else
-				  pungetc();
-		  } else
-			  pungetc();
-		  break;
-	case 'c':
-		  c = pgetc();
-		  if (c < 0x3f || c > 0x7a || c == 0x60)
-			  synerror("Bad escape sequence");
-		  if (c == '\\' && pgetc() != '\\')
-			  synerror("Bad escape sequence");
-		  if (c == '?')
-			  v = 127;
-		  else
-			  v = c & 0x1f;
-		  break;
-	case 'u':
-	case 'U':
-		  n = c == 'U' ? 8 : 4;
-		  v = 0;
-		  for (i = 0; i < n; i++) {
-			  c = pgetc();
-			  if (c >= '0' && c <= '9')
-				  v = (v << 4) + c - '0';
-			  else if (c >= 'A' && c <= 'F')
-				  v = (v << 4) + c - 'A' + 10;
-			  else if (c >= 'a' && c <= 'f')
-				  v = (v << 4) + c - 'a' + 10;
-			  else
-				  synerror("Bad escape sequence");
-		  }
-		  if (v == 0 || (v >= 0xd800 && v <= 0xdfff))
-			  synerror("Bad escape sequence");
-		  /* We really need iconv here. */
-		  if (initial_localeisutf8 && v > 127) {
-			  CHECKSTRSPACE(4, out);
-			  /*
-			   * We cannot use wctomb() as the locale may have
-			   * changed.
-			   */
-			  if (v <= 0x7ff) {
-				  USTPUTC(0xc0 | v >> 6, out);
-				  USTPUTC(0x80 | (v & 0x3f), out);
-				  return out;
-			  } else if (v <= 0xffff) {
-				  USTPUTC(0xe0 | v >> 12, out);
-				  USTPUTC(0x80 | ((v >> 6) & 0x3f), out);
-				  USTPUTC(0x80 | (v & 0x3f), out);
-				  return out;
-			  } else if (v <= 0x10ffff) {
-				  USTPUTC(0xf0 | v >> 18, out);
-				  USTPUTC(0x80 | ((v >> 12) & 0x3f), out);
-				  USTPUTC(0x80 | ((v >> 6) & 0x3f), out);
-				  USTPUTC(0x80 | (v & 0x3f), out);
-				  return out;
-			  }
-		  }
-		  if (v > 127)
-			  v = '?';
-		  break;
-	default:
-		  synerror("Bad escape sequence");
-	}
-	vc = (char)v;
-	/*
-	 * We can't handle NUL bytes.
-	 * POSIX says we should skip till the closing quote.
-	 */
-	if (vc == '\0') {
-		while ((c = pgetc()) != '\'') {
-			if (c == '\\')
-				c = pgetc();
-			if (c == PEOF)
-				synerror("Unterminated quoted string");
-			if (c == '\n') {
-				plinno++;
-				if (doprompt)
-					setprompt(2);
-				else
-					setprompt(0);
-			}
-		}
-		pungetc();
-		return out;
-	}
-	if (SQSYNTAX[vc] == CCTL)
-		USTPUTC(CTLESC, out);
-	USTPUTC(vc, out);
-	return out;
-}
-
-
-/*
- * If eofmark is NULL, read a word or a redirection symbol.  If eofmark
- * is not NULL, read a here document.  In the latter case, eofmark is the
- * word which marks the end of the document and striptabs is true if
- * leading tabs should be stripped from the document.  The argument firstc
- * is the first character of the input token or document.
- *
- * Because C does not have internal subroutines, I have simulated them
- * using goto's to implement the subroutine linkage.  The following macros
- * will run code that appears at the end of readtoken1.
- */
-
-#define PARSESUB()	{goto parsesub; parsesub_return:;}
-#define	PARSEARITH()	{goto parsearith; parsearith_return:;}
-
-static int
-readtoken1(int firstc, char const *initialsyntax, const char *eofmark,
-    int striptabs)
-{
-	int c = firstc;
-	char *out;
-	int len;
-	struct nodelist *bqlist;
-	int quotef;
-	int newvarnest;
-	int level;
-	int synentry;
-	struct tokenstate state_static[MAXNEST_static];
-	int maxnest = MAXNEST_static;
-	struct tokenstate *state = state_static;
-	int sqiscstyle = 0;
-
-	startlinno = plinno;
-	quotef = 0;
-	bqlist = NULL;
-	newvarnest = 0;
-	level = 0;
-	state[level].syntax = initialsyntax;
-	state[level].parenlevel = 0;
-	state[level].category = TSTATE_TOP;
-
-	STARTSTACKSTR(out);
-	loop: {	/* for each line, until end of word */
-		if (eofmark && eofmark != NOEOFMARK)
-			/* set c to PEOF if at end of here document */
-			c = checkend(c, eofmark, striptabs);
-		for (;;) {	/* until end of line or end of word */
-			CHECKSTRSPACE(4, out);	/* permit 4 calls to USTPUTC */
-
-			synentry = state[level].syntax[c];
-
-			switch(synentry) {
-			case CNL:	/* '\n' */
-				if (level == 0)
-					goto endword;	/* exit outer loop */
-				/* FALLTHROUGH */
-			case CQNL:
-				USTPUTC(c, out);
-				plinno++;
-				if (doprompt)
-					setprompt(2);
-				else
-					setprompt(0);
-				c = pgetc();
-				goto loop;		/* continue outer loop */
-			case CSBACK:
-				if (sqiscstyle) {
-					out = readcstyleesc(out);
-					break;
-				}
-				/* FALLTHROUGH */
-			case CWORD:
-				USTPUTC(c, out);
-				break;
-			case CCTL:
-				if (eofmark == NULL || initialsyntax != SQSYNTAX)
-					USTPUTC(CTLESC, out);
-				USTPUTC(c, out);
-				break;
-			case CBACK:	/* backslash */
-				c = pgetc();
-				if (c == PEOF) {
-					USTPUTC('\\', out);
-					pungetc();
-				} else if (c == '\n') {
-					plinno++;
-					if (doprompt)
-						setprompt(2);
-					else
-						setprompt(0);
-				} else {
-					if (state[level].syntax == DQSYNTAX &&
-					    c != '\\' && c != '`' && c != '$' &&
-					    (c != '"' || (eofmark != NULL &&
-						newvarnest == 0)) &&
-					    (c != '}' || state[level].category != TSTATE_VAR_OLD))
-						USTPUTC('\\', out);
-					if ((eofmark == NULL ||
-					    newvarnest > 0) &&
-					    state[level].syntax == BASESYNTAX)
-						USTPUTC(CTLQUOTEMARK, out);
-					if (SQSYNTAX[c] == CCTL)
-						USTPUTC(CTLESC, out);
-					USTPUTC(c, out);
-					if ((eofmark == NULL ||
-					    newvarnest > 0) &&
-					    state[level].syntax == BASESYNTAX &&
-					    state[level].category == TSTATE_VAR_OLD)
-						USTPUTC(CTLQUOTEEND, out);
-					quotef++;
-				}
-				break;
-			case CSQUOTE:
-				USTPUTC(CTLQUOTEMARK, out);
-				state[level].syntax = SQSYNTAX;
-				sqiscstyle = 0;
-				break;
-			case CDQUOTE:
-				USTPUTC(CTLQUOTEMARK, out);
-				state[level].syntax = DQSYNTAX;
-				break;
-			case CENDQUOTE:
-				if (eofmark != NULL && newvarnest == 0)
-					USTPUTC(c, out);
-				else {
-					if (state[level].category == TSTATE_VAR_OLD)
-						USTPUTC(CTLQUOTEEND, out);
-					state[level].syntax = BASESYNTAX;
-					quotef++;
-				}
-				break;
-			case CVAR:	/* '$' */
-				PARSESUB();		/* parse substitution */
-				break;
-			case CENDVAR:	/* '}' */
-				if (level > 0 &&
-				    ((state[level].category == TSTATE_VAR_OLD &&
-				      state[level].syntax ==
-				      state[level - 1].syntax) ||
-				    (state[level].category == TSTATE_VAR_NEW &&
-				     state[level].syntax == BASESYNTAX))) {
-					if (state[level].category == TSTATE_VAR_NEW)
-						newvarnest--;
-					level--;
-					USTPUTC(CTLENDVAR, out);
-				} else {
-					USTPUTC(c, out);
-				}
-				break;
-			case CLP:	/* '(' in arithmetic */
-				state[level].parenlevel++;
-				USTPUTC(c, out);
-				break;
-			case CRP:	/* ')' in arithmetic */
-				if (state[level].parenlevel > 0) {
-					USTPUTC(c, out);
-					--state[level].parenlevel;
-				} else {
-					if (pgetc_linecont() == ')') {
-						if (level > 0 &&
-						    state[level].category == TSTATE_ARITH) {
-							level--;
-							USTPUTC(CTLENDARI, out);
-						} else
-							USTPUTC(')', out);
-					} else {
-						/*
-						 * unbalanced parens
-						 *  (don't 2nd guess - no error)
-						 */
-						pungetc();
-						USTPUTC(')', out);
-					}
-				}
-				break;
-			case CBQUOTE:	/* '`' */
-				out = parsebackq(out, &bqlist, 1,
-				    state[level].syntax == DQSYNTAX &&
-				    (eofmark == NULL || newvarnest > 0),
-				    state[level].syntax == DQSYNTAX || state[level].syntax == ARISYNTAX);
-				break;
-			case CEOF:
-				goto endword;		/* exit outer loop */
-			case CIGN:
-				break;
-			default:
-				if (level == 0)
-					goto endword;	/* exit outer loop */
-				USTPUTC(c, out);
-			}
-			c = pgetc_macro();
-		}
-	}
-endword:
-	if (state[level].syntax == ARISYNTAX)
-		synerror("Missing '))'");
-	if (state[level].syntax != BASESYNTAX && eofmark == NULL)
-		synerror("Unterminated quoted string");
-	if (state[level].category == TSTATE_VAR_OLD ||
-	    state[level].category == TSTATE_VAR_NEW) {
-		startlinno = plinno;
-		synerror("Missing '}'");
-	}
-	if (state != state_static)
-		parser_temp_free_upto(state);
-	USTPUTC('\0', out);
-	len = out - stackblock();
-	out = stackblock();
-	if (eofmark == NULL) {
-		if ((c == '>' || c == '<')
-		 && quotef == 0
-		 && len <= 2
-		 && (*out == '\0' || is_digit(*out))) {
-			parseredir(out, c);
-			return lasttoken = TREDIR;
-		} else {
-			pungetc();
-		}
-	}
-	quoteflag = quotef;
-	backquotelist = bqlist;
-	grabstackblock(len);
-	wordtext = out;
-	return lasttoken = TWORD;
-/* end of readtoken routine */
-
-
-/*
- * Parse a substitution.  At this point, we have read the dollar sign
- * and nothing else.
- */
-
-parsesub: {
-	int subtype;
-	int typeloc;
-	int flags;
-	char *p;
-	static const char types[] = "}-+?=";
-	int linno;
-	int length;
-	int c1;
-
-	c = pgetc_linecont();
-	if (c == '(') {	/* $(command) or $((arith)) */
-		if (pgetc_linecont() == '(') {
-			PARSEARITH();
-		} else {
-			pungetc();
-			out = parsebackq(out, &bqlist, 0,
-			    state[level].syntax == DQSYNTAX &&
-			    (eofmark == NULL || newvarnest > 0),
-			    state[level].syntax == DQSYNTAX ||
-			    state[level].syntax == ARISYNTAX);
-		}
-	} else if (c == '{' || is_name(c) || is_special(c)) {
-		USTPUTC(CTLVAR, out);
-		typeloc = out - stackblock();
-		USTPUTC(VSNORMAL, out);
-		subtype = VSNORMAL;
-		flags = 0;
-		if (c == '{') {
-			c = pgetc_linecont();
-			subtype = 0;
-		}
-varname:
-		if (!is_eof(c) && is_name(c)) {
-			length = 0;
-			do {
-				STPUTC(c, out);
-				c = pgetc_linecont();
-				length++;
-			} while (!is_eof(c) && is_in_name(c));
-			if (length == 6 &&
-			    strncmp(out - length, "LINENO", length) == 0) {
-				/* Replace the variable name with the
-				 * current line number. */
-				STADJUST(-6, out);
-				CHECKSTRSPACE(11, out);
-				linno = plinno;
-				if (funclinno != 0)
-					linno -= funclinno - 1;
-				length = snprintf(out, 11, "%d", linno);
-				if (length > 10)
-					length = 10;
-				out += length;
-				flags |= VSLINENO;
-			}
-		} else if (is_digit(c)) {
-			if (subtype != VSNORMAL) {
-				do {
-					STPUTC(c, out);
-					c = pgetc_linecont();
-				} while (is_digit(c));
-			} else {
-				USTPUTC(c, out);
-				c = pgetc_linecont();
-			}
-		} else if (is_special(c)) {
-			c1 = c;
-			c = pgetc_linecont();
-			if (subtype == 0 && c1 == '#') {
-				subtype = VSLENGTH;
-				if (strchr(types, c) == NULL && c != ':' &&
-				    c != '#' && c != '%')
-					goto varname;
-				c1 = c;
-				c = pgetc_linecont();
-				if (c1 != '}' && c == '}') {
-					pungetc();
-					c = c1;
-					goto varname;
-				}
-				pungetc();
-				c = c1;
-				c1 = '#';
-				subtype = 0;
-			}
-			USTPUTC(c1, out);
-		} else {
-			subtype = VSERROR;
-			if (c == '}')
-				pungetc();
-			else if (c == '\n' || c == PEOF)
-				synerror("Unexpected end of line in substitution");
-			else if (BASESYNTAX[c] != CCTL)
-				USTPUTC(c, out);
-		}
-		if (subtype == 0) {
-			switch (c) {
-			case ':':
-				flags |= VSNUL;
-				c = pgetc_linecont();
-				/*FALLTHROUGH*/
-			default:
-				p = strchr(types, c);
-				if (p == NULL) {
-					if (c == '\n' || c == PEOF)
-						synerror("Unexpected end of line in substitution");
-					if (flags == VSNUL)
-						STPUTC(':', out);
-					if (BASESYNTAX[c] != CCTL)
-						STPUTC(c, out);
-					subtype = VSERROR;
-				} else
-					subtype = p - types + VSNORMAL;
-				break;
-			case '%':
-			case '#':
-				{
-					int cc = c;
-					subtype = c == '#' ? VSTRIMLEFT :
-							     VSTRIMRIGHT;
-					c = pgetc_linecont();
-					if (c == cc)
-						subtype++;
-					else
-						pungetc();
-					break;
-				}
-			}
-		} else if (subtype != VSERROR) {
-			if (subtype == VSLENGTH && c != '}')
-				subtype = VSERROR;
-			pungetc();
-		}
-		STPUTC('=', out);
-		if (state[level].syntax == DQSYNTAX ||
-		    state[level].syntax == ARISYNTAX)
-			flags |= VSQUOTE;
-		*(stackblock() + typeloc) = subtype | flags;
-		if (subtype != VSNORMAL) {
-			if (level + 1 >= maxnest) {
-				maxnest *= 2;
-				if (state == state_static) {
-					state = parser_temp_alloc(
-					    maxnest * sizeof(*state));
-					memcpy(state, state_static,
-					    MAXNEST_static * sizeof(*state));
-				} else
-					state = parser_temp_realloc(state,
-					    maxnest * sizeof(*state));
-			}
-			level++;
-			state[level].parenlevel = 0;
-			if (subtype == VSMINUS || subtype == VSPLUS ||
-			    subtype == VSQUESTION || subtype == VSASSIGN) {
-				/*
-				 * For operators that were in the Bourne shell,
-				 * inherit the double-quote state.
-				 */
-				state[level].syntax = state[level - 1].syntax;
-				state[level].category = TSTATE_VAR_OLD;
-			} else {
-				/*
-				 * The other operators take a pattern,
-				 * so go to BASESYNTAX.
-				 * Also, ' and " are now special, even
-				 * in here documents.
-				 */
-				state[level].syntax = BASESYNTAX;
-				state[level].category = TSTATE_VAR_NEW;
-				newvarnest++;
-			}
-		}
-	} else if (c == '\'' && state[level].syntax == BASESYNTAX) {
-		/* $'cstylequotes' */
-		USTPUTC(CTLQUOTEMARK, out);
-		state[level].syntax = SQSYNTAX;
-		sqiscstyle = 1;
-	} else {
-		USTPUTC('$', out);
-		pungetc();
-	}
-	goto parsesub_return;
-}
-
-
-/*
- * Parse an arithmetic expansion (indicate start of one and set state)
- */
-parsearith: {
-
-	if (level + 1 >= maxnest) {
-		maxnest *= 2;
-		if (state == state_static) {
-			state = parser_temp_alloc(
-			    maxnest * sizeof(*state));
-			memcpy(state, state_static,
-			    MAXNEST_static * sizeof(*state));
-		} else
-			state = parser_temp_realloc(state,
-			    maxnest * sizeof(*state));
-	}
-	level++;
-	state[level].syntax = ARISYNTAX;
-	state[level].parenlevel = 0;
-	state[level].category = TSTATE_ARITH;
-	USTPUTC(CTLARI, out);
-	if (state[level - 1].syntax == DQSYNTAX)
-		USTPUTC('"',out);
-	else
-		USTPUTC(' ',out);
-	goto parsearith_return;
-}
-
-} /* end of readtoken */
-
-
-/*
- * Returns true if the text contains nothing to expand (no dollar signs
- * or backquotes).
- */
-
-static int
-noexpand(char *text)
-{
-	char *p;
-	char c;
-
-	p = text;
-	while ((c = *p++) != '\0') {
-		if ( c == CTLQUOTEMARK)
-			continue;
-		if (c == CTLESC)
-			p++;
-		else if (BASESYNTAX[(int)c] == CCTL)
-			return 0;
-	}
-	return 1;
-}
-
-
-/*
- * Return true if the argument is a legal variable name (a letter or
- * underscore followed by zero or more letters, underscores, and digits).
- */
-
-int
-goodname(const char *name)
-{
-	const char *p;
-
-	p = name;
-	if (! is_name(*p))
-		return 0;
-	while (*++p) {
-		if (! is_in_name(*p))
-			return 0;
-	}
-	return 1;
-}
-
-
-int
-isassignment(const char *p)
-{
-	if (!is_name(*p))
-		return 0;
-	p++;
-	for (;;) {
-		if (*p == '=')
-			return 1;
-		else if (!is_in_name(*p))
-			return 0;
-		p++;
-	}
-}
-
-
-static void
-consumetoken(int token)
-{
-	if (readtoken() != token)
-		synexpect(token);
-}
-
-
-/*
- * Called when an unexpected token is read during the parse.  The argument
- * is the token that is expected, or -1 if more than one type of token can
- * occur at this point.
- */
-
-static void
-synexpect(int token)
-{
-	char msg[64];
-
-	if (token >= 0) {
-		fmtstr(msg, 64, "%s unexpected (expecting %s)",
-			tokname[lasttoken], tokname[token]);
-	} else {
-		fmtstr(msg, 64, "%s unexpected", tokname[lasttoken]);
-	}
-	synerror(msg);
-}
-
-
-static void
-synerror(const char *msg)
-{
-	if (commandname)
-		outfmt(out2, "%s: %d: ", commandname, startlinno);
-	else if (arg0)
-		outfmt(out2, "%s: ", arg0);
-	outfmt(out2, "Syntax error: %s\n", msg);
-	error((char *)NULL);
-}
-
-static void
-setprompt(int which)
-{
-	whichprompt = which;
-	if (which == 0)
-		return;
-
-	if (which == 1 && *ps0val()) {
-		out2str(expandprompt(ps0val()));
-		flushout(out2);
-	}
-
-#ifndef NO_HISTORY
-	if (!el)
-#endif
-	{
-		out2str(getprompt(NULL));
-		flushout(out2);
-	}
-}
-
-static int
-pgetc_linecont(void)
-{
-	int c;
-
-	while ((c = pgetc_macro()) == '\\') {
-		c = pgetc();
-		if (c == '\n') {
-			plinno++;
-			if (doprompt)
-				setprompt(2);
-			else
-				setprompt(0);
-		} else {
-			pungetc();
-			/* Allow the backslash to be pushed back. */
-			pushstring("\\", 1, NULL);
-			return (pgetc());
-		}
-	}
-	return (c);
-}
-
-static char *
-expandprompt(const char *fmt) {
-	static char ps[PROMPTLEN];
-	const char *pwd, *home;
-	int i, trim;
-
-	/*
-	 * Format prompt string.
-	 */
-	for (i = 0; (i < PROMPTLEN - 1) && (*fmt != '\0'); i++, fmt++)
-		if (*fmt == '\\')
-			switch (*++fmt) {
-
-				/*
-				 * Hostname.
-				 *
-				 * \h specifies just the local hostname,
-				 * \H specifies fully-qualified hostname.
-				 */
-			case 'h':
-			case 'H':
-				ps[i] = '\0';
-				gethostname(&ps[i], PROMPTLEN - i - 1);
-				ps[PROMPTLEN - 1] = '\0';
-				/* Skip to end of hostname. */
-				trim = (*fmt == 'h') ? '.' : '\0';
-				while ((ps[i] != '\0') && (ps[i] != trim))
-					i++;
-				--i;
-				break;
-
-				/*
-				 * Working directory.
-				 *
-				 * \W specifies just the final component,
-				 * \w specifies the entire path.
-				 */
-			case 'W':
-			case 'w':
-				pwd = lookupvar("PWD");
-				home = lookupvar("HOME");
-				if (pwd == NULL || *pwd == '\0')
-					pwd = "?";
-				if (home == NULL || *home == '\0')
-					home = "?";
-				if (*fmt == 'W' &&
-				    *pwd == '/' && pwd[1] != '\0' &&
-					strcmp(pwd, home) != 0) {
-					strlcpy(&ps[i], strrchr(pwd, '/') + 1,
-					    PROMPTLEN - i);
-				} else {
-					if (strncmp(pwd, home, strlen(home)) == 0) {
-						ps[i++] = '~';
-						pwd += strlen(home);
-					}
-					strlcpy(&ps[i], pwd, PROMPTLEN - i);
-				}
-				/* Skip to end of path. */
-				while (ps[i] != '\0')
-					i++;
-				--i;
-				break;
-
-				/*
-				 * Exit status if non-zero.
-				 */
-			case '?':
-				if (exitstatus != 0) {
-					snprintf(&ps[i], PROMPTLEN - i, "%d", exitstatus);
-					while (ps[i] != '\0')
-						i++;
-				}
-				i--;
-				break;
-
-				/*
-				 * Superuser status.
-				 *
-				 * '$' for normal users, '#' for root.
-				 */
-			case '$':
-				ps[i] = (geteuid() != 0) ? '$' : '#';
-				break;
-
-				/*
-				 * A literal \.
-				 */
-			case '\\':
-				ps[i] = '\\';
-				break;
-
-				/*
-				 * Emit unrecognized formats verbatim.
-				 */
-			default:
-				ps[i] = '\\';
-				if (i < PROMPTLEN - 2)
-					ps[++i] = *fmt;
-				break;
-			}
-		else
-			ps[i] = *fmt;
-	ps[i] = '\0';
-	return (ps);
-}
-
-/*
- * called by editline -- any expansions to the prompt
- *    should be added here.
- */
-char *
-getprompt(void *unused __unused)
-{
-	const char *fmt;
-	static char internal_error[] = "??";
-
-	/*
-	 * Select prompt format.
-	 */
-	switch (whichprompt) {
-	case 0:
-		fmt = "";
-		break;
-	case 1:
-		fmt = ps1val();
-		break;
-	case 2:
-		fmt = ps2val();
-		break;
-	default:
-		return internal_error;
-	}
-
-	return expandprompt(fmt);
-}
-
-char *
-getrprompt(void *unused __unused)
-{
-	const char *fmt;
-	static char internal_error[] = "??";
-
-	/*
-	 * Select prompt format.
-	 */
-	switch (whichprompt) {
-	case 0:
-		fmt = "";
-		break;
-	case 1:
-		fmt = rps1val();
-		break;
-	case 2:
-		fmt = rps2val();
-		break;
-	default:
-		return internal_error;
-	}
-
-	return expandprompt(fmt);
-}
-
-
-const char *
-expandstr(const char *ps)
-{
-	union node n;
-	struct jmploc jmploc;
-	struct jmploc *const savehandler = handler;
-	const int saveprompt = doprompt;
-	struct parsefile *const savetopfile = getcurrentfile();
-	struct parser_temp *const saveparser_temp = parser_temp;
-	const char *result = NULL;
-
-	if (!setjmp(jmploc.loc)) {
-		handler = &jmploc;
-		parser_temp = NULL;
-		setinputstring(ps, 1);
-		doprompt = 0;
-		readtoken1(pgetc(), DQSYNTAX, NOEOFMARK, 0);
-		if (backquotelist != NULL)
-			error("Command substitution not allowed here");
-
-		n.narg.type = NARG;
-		n.narg.next = NULL;
-		n.narg.text = wordtext;
-		n.narg.backquote = backquotelist;
-
-		expandarg(&n, NULL, 0);
-		result = stackblock();
-		INTOFF;
-	}
-	handler = savehandler;
-	doprompt = saveprompt;
-	popfilesupto(savetopfile);
-	if (parser_temp != saveparser_temp) {
-		parser_temp_free_all();
-		parser_temp = saveparser_temp;
-	}
-	if (result != NULL) {
-		INTON;
-	} else if (exception == EXINT)
-		raise(SIGINT);
-	return result;
-}
diff --git a/bin/1sh/parser.h b/bin/1sh/parser.h
deleted file mode 100644
index bc86f7e4..00000000
--- a/bin/1sh/parser.h
+++ /dev/null
@@ -1,88 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)parser.h	8.3 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/parser.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-/* control characters in argument strings */
-#define CTLESC '\300'
-#define CTLVAR '\301'
-#define CTLENDVAR '\371'
-#define CTLBACKQ '\372'
-#define CTLQUOTE 01		/* ored with CTLBACKQ code if in quotes */
-/*	CTLBACKQ | CTLQUOTE == '\373' */
-#define	CTLARI	'\374'
-#define	CTLENDARI '\375'
-#define	CTLQUOTEMARK '\376'
-#define	CTLQUOTEEND '\377' /* only for ${v+-...} */
-
-/* variable substitution byte (follows CTLVAR) */
-#define VSTYPE		0x0f	/* type of variable substitution */
-#define VSNUL		0x10	/* colon--treat the empty string as unset */
-#define VSLINENO	0x20	/* expansion of $LINENO, the line number \
-				   follows immediately */
-#define VSQUOTE		0x80	/* inside double quotes--suppress splitting */
-
-/* values of VSTYPE field */
-#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
-#define VSMINUS		0x2		/* ${var-text} */
-#define VSPLUS		0x3		/* ${var+text} */
-#define VSQUESTION	0x4		/* ${var?message} */
-#define VSASSIGN	0x5		/* ${var=text} */
-#define VSTRIMLEFT	0x6		/* ${var#pattern} */
-#define VSTRIMLEFTMAX	0x7		/* ${var##pattern} */
-#define VSTRIMRIGHT	0x8		/* ${var%pattern} */
-#define VSTRIMRIGHTMAX 	0x9		/* ${var%%pattern} */
-#define VSLENGTH	0xa		/* ${#var} */
-#define VSERROR		0xb		/* Syntax error, issue when expanded */
-
-
-/*
- * NEOF is returned by parsecmd when it encounters an end of file.  It
- * must be distinct from NULL.
- */
-#define NEOF ((union node *)-1)
-extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
-extern const char *const parsekwd[];
-
-
-union node *parsecmd(int);
-union node *parsewordexp(void);
-void forcealias(void);
-void fixredir(union node *, const char *, int);
-int goodname(const char *);
-int isassignment(const char *);
-char *getprompt(void *);
-char *getrprompt(void *);
-const char *expandstr(const char *);
diff --git a/bin/1sh/printf.c b/bin/1sh/printf.c
deleted file mode 100644
index e698c417..00000000
--- a/bin/1sh/printf.c
+++ /dev/null
@@ -1,688 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
- * Copyright 2014 Garrett D'Amore <garrett@damore.org>
- * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
- * Copyright (c) 1989, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-/*
- * Important: This file is used both as a standalone program /usr/bin/printf
- * and as a builtin for /bin/sh (#define SHELL).
- */
-
-#ifndef SHELL
-#ifndef lint
-static char const copyright[] =
-"@(#) Copyright (c) 1989, 1993\n\
-	The Regents of the University of California.  All rights reserved.\n";
-#endif /* not lint */
-#endif
-
-#ifndef lint
-#if 0
-static char const sccsid[] = "@(#)printf.c	8.1 (Berkeley) 7/20/93";
-#endif
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/usr.bin/printf/printf.c 337618 2018-08-11 11:13:34Z jilles $");
-#endif /* not lint */
-
-#include <sys/types.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <locale.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <wchar.h>
-
-#ifdef SHELL
-#define	main printfcmd
-#include "bltin.h"
-#include "options.h"
-#endif
-
-#define	PF(f, func) do {						\
-	if (havewidth)							\
-		if (haveprec)						\
-			(void)printf(f, fieldwidth, precision, func);	\
-		else							\
-			(void)printf(f, fieldwidth, func);		\
-	else if (haveprec)						\
-		(void)printf(f, precision, func);			\
-	else								\
-		(void)printf(f, func);					\
-} while (0)
-
-static int	 asciicode(void);
-static char	*printf_doformat(char *, int *);
-static int	 escape(char *, int, size_t *);
-static int	 getchr(void);
-static int	 getfloating(long double *, int);
-static int	 getint(int *);
-static int	 getnum(intmax_t *, uintmax_t *, int);
-static const char
-		*getstr(void);
-static char	*mknum(char *, char);
-static void	 usage(void);
-
-static const char digits[] = "0123456789";
-
-static char end_fmt[1];
-
-static int  myargc;
-static char **myargv;
-static char **gargv;
-static char **maxargv;
-
-int
-main(int argc, char *argv[])
-{
-	size_t len;
-	int end, rval;
-	char *format, *fmt, *start;
-#ifndef SHELL
-	int ch;
-
-	(void) setlocale(LC_ALL, "");
-#endif
-
-#ifdef SHELL
-	nextopt("");
-	argc -= argptr - argv;
-	argv = argptr;
-#else
-	while ((ch = getopt(argc, argv, "")) != -1)
-		switch (ch) {
-		case '?':
-		default:
-			usage();
-			return (1);
-		}
-	argc -= optind;
-	argv += optind;
-#endif
-
-	if (argc < 1) {
-		usage();
-		return (1);
-	}
-
-#ifdef SHELL
-	INTOFF;
-#endif
-	/*
-	 * Basic algorithm is to scan the format string for conversion
-	 * specifications -- once one is found, find out if the field
-	 * width or precision is a '*'; if it is, gather up value.  Note,
-	 * format strings are reused as necessary to use up the provided
-	 * arguments, arguments of zero/null string are provided to use
-	 * up the format string.
-	 */
-	fmt = format = *argv;
-	escape(fmt, 1, &len);		/* backslash interpretation */
-	rval = end = 0;
-	gargv = ++argv;
-
-	for (;;) {
-		maxargv = gargv;
-
-		myargv = gargv;
-		for (myargc = 0; gargv[myargc]; myargc++)
-			/* nop */;
-		start = fmt;
-		while (fmt < format + len) {
-			if (fmt[0] == '%') {
-				fwrite(start, 1, fmt - start, stdout);
-				if (fmt[1] == '%') {
-					/* %% prints a % */
-					putchar('%');
-					fmt += 2;
-				} else {
-					fmt = printf_doformat(fmt, &rval);
-					if (fmt == NULL || fmt == end_fmt) {
-#ifdef SHELL
-						INTON;
-#endif
-						return (fmt == NULL ? 1 : rval);
-					}
-					end = 0;
-				}
-				start = fmt;
-			} else
-				fmt++;
-			if (gargv > maxargv)
-				maxargv = gargv;
-		}
-		gargv = maxargv;
-
-		if (end == 1) {
-			warnx("missing format character");
-#ifdef SHELL
-			INTON;
-#endif
-			return (1);
-		}
-		fwrite(start, 1, fmt - start, stdout);
-		if (!*gargv) {
-#ifdef SHELL
-			INTON;
-#endif
-			return (rval);
-		}
-		/* Restart at the beginning of the format string. */
-		fmt = format;
-		end = 1;
-	}
-	/* NOTREACHED */
-}
-
-
-static char *
-printf_doformat(char *fmt, int *rval)
-{
-	static const char skip1[] = "#'-+ 0";
-	int fieldwidth, haveprec, havewidth, mod_ldbl, precision;
-	char convch, nextch;
-	char start[strlen(fmt) + 1];
-	char **fargv;
-	char *dptr;
-	int l;
-
-	dptr = start;
-	*dptr++ = '%';
-	*dptr = 0;
-
-	fmt++;
-
-	/* look for "n$" field index specifier */
-	l = strspn(fmt, digits);
-	if ((l > 0) && (fmt[l] == '$')) {
-		int idx = atoi(fmt);
-		if (idx <= myargc) {
-			gargv = &myargv[idx - 1];
-		} else {
-			gargv = &myargv[myargc];
-		}
-		if (gargv > maxargv)
-			maxargv = gargv;
-		fmt += l + 1;
-
-		/* save format argument */
-		fargv = gargv;
-	} else {
-		fargv = NULL;
-	}
-
-	/* skip to field width */
-	while (*fmt && strchr(skip1, *fmt) != NULL) {
-		*dptr++ = *fmt++;
-		*dptr = 0;
-	}
-
-	if (*fmt == '*') {
-
-		fmt++;
-		l = strspn(fmt, digits);
-		if ((l > 0) && (fmt[l] == '$')) {
-			int idx = atoi(fmt);
-			if (fargv == NULL) {
-				warnx("incomplete use of n$");
-				return (NULL);
-			}
-			if (idx <= myargc) {
-				gargv = &myargv[idx - 1];
-			} else {
-				gargv = &myargv[myargc];
-			}
-			fmt += l + 1;
-		} else if (fargv != NULL) {
-			warnx("incomplete use of n$");
-			return (NULL);
-		}
-
-		if (getint(&fieldwidth))
-			return (NULL);
-		if (gargv > maxargv)
-			maxargv = gargv;
-		havewidth = 1;
-
-		*dptr++ = '*';
-		*dptr = 0;
-	} else {
-		havewidth = 0;
-
-		/* skip to possible '.', get following precision */
-		while (isdigit(*fmt)) {
-			*dptr++ = *fmt++;
-			*dptr = 0;
-		}
-	}
-
-	if (*fmt == '.') {
-		/* precision present? */
-		fmt++;
-		*dptr++ = '.';
-
-		if (*fmt == '*') {
-
-			fmt++;
-			l = strspn(fmt, digits);
-			if ((l > 0) && (fmt[l] == '$')) {
-				int idx = atoi(fmt);
-				if (fargv == NULL) {
-					warnx("incomplete use of n$");
-					return (NULL);
-				}
-				if (idx <= myargc) {
-					gargv = &myargv[idx - 1];
-				} else {
-					gargv = &myargv[myargc];
-				}
-				fmt += l + 1;
-			} else if (fargv != NULL) {
-				warnx("incomplete use of n$");
-				return (NULL);
-			}
-
-			if (getint(&precision))
-				return (NULL);
-			if (gargv > maxargv)
-				maxargv = gargv;
-			haveprec = 1;
-			*dptr++ = '*';
-			*dptr = 0;
-		} else {
-			haveprec = 0;
-
-			/* skip to conversion char */
-			while (isdigit(*fmt)) {
-				*dptr++ = *fmt++;
-				*dptr = 0;
-			}
-		}
-	} else
-		haveprec = 0;
-	if (!*fmt) {
-		warnx("missing format character");
-		return (NULL);
-	}
-	*dptr++ = *fmt;
-	*dptr = 0;
-
-	/*
-	 * Look for a length modifier.  POSIX doesn't have these, so
-	 * we only support them for floating-point conversions, which
-	 * are extensions.  This is useful because the L modifier can
-	 * be used to gain extra range and precision, while omitting
-	 * it is more likely to produce consistent results on different
-	 * architectures.  This is not so important for integers
-	 * because overflow is the only bad thing that can happen to
-	 * them, but consider the command  printf %a 1.1
-	 */
-	if (*fmt == 'L') {
-		mod_ldbl = 1;
-		fmt++;
-		if (!strchr("aAeEfFgG", *fmt)) {
-			warnx("bad modifier L for %%%c", *fmt);
-			return (NULL);
-		}
-	} else {
-		mod_ldbl = 0;
-	}
-
-	/* save the current arg offset, and set to the format arg */
-	if (fargv != NULL) {
-		gargv = fargv;
-	}
-
-	convch = *fmt;
-	nextch = *++fmt;
-
-	*fmt = '\0';
-	switch (convch) {
-	case 'b': {
-		size_t len;
-		char *p;
-		int getout;
-
-		/* Convert "b" to "s" for output. */
-		start[strlen(start) - 1] = 's';
-		if ((p = strdup(getstr())) == NULL) {
-			warnx("%s", strerror(ENOMEM));
-			return (NULL);
-		}
-		getout = escape(p, 0, &len);
-		PF(start, p);
-		/* Restore format for next loop. */
-
-		free(p);
-		if (getout)
-			return (end_fmt);
-		break;
-	}
-	case 'c': {
-		char p;
-
-		p = getchr();
-		if (p != '\0')
-			PF(start, p);
-		break;
-	}
-	case 's': {
-		const char *p;
-
-		p = getstr();
-		PF(start, p);
-		break;
-	}
-	case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
-		char *f;
-		intmax_t val;
-		uintmax_t uval;
-		int signedconv;
-
-		signedconv = (convch == 'd' || convch == 'i');
-		if ((f = mknum(start, convch)) == NULL)
-			return (NULL);
-		if (getnum(&val, &uval, signedconv))
-			*rval = 1;
-		if (signedconv)
-			PF(f, val);
-		else
-			PF(f, uval);
-		break;
-	}
-	case 'e': case 'E':
-	case 'f': case 'F':
-	case 'g': case 'G':
-	case 'a': case 'A': {
-		long double p;
-
-		if (getfloating(&p, mod_ldbl))
-			*rval = 1;
-		if (mod_ldbl)
-			PF(start, p);
-		else
-			PF(start, (double)p);
-		break;
-	}
-	default:
-		warnx("illegal format character %c", convch);
-		return (NULL);
-	}
-	*fmt = nextch;
-	/* return the gargv to the next element */
-	return (fmt);
-}
-
-static char *
-mknum(char *str, char ch)
-{
-	static char *copy;
-	static size_t copy_size;
-	char *newcopy;
-	size_t len, newlen;
-
-	len = strlen(str) + 2;
-	if (len > copy_size) {
-		newlen = ((len + 1023) >> 10) << 10;
-		if ((newcopy = realloc(copy, newlen)) == NULL) {
-			warnx("%s", strerror(ENOMEM));
-			return (NULL);
-		}
-		copy = newcopy;
-		copy_size = newlen;
-	}
-
-	memmove(copy, str, len - 3);
-	copy[len - 3] = 'j';
-	copy[len - 2] = ch;
-	copy[len - 1] = '\0';
-	return (copy);
-}
-
-static int
-escape(char *fmt, int percent, size_t *len)
-{
-	char *save, *store, c;
-	int value;
-
-	for (save = store = fmt; ((c = *fmt) != 0); ++fmt, ++store) {
-		if (c != '\\') {
-			*store = c;
-			continue;
-		}
-		switch (*++fmt) {
-		case '\0':		/* EOS, user error */
-			*store = '\\';
-			*++store = '\0';
-			*len = store - save;
-			return (0);
-		case '\\':		/* backslash */
-		case '\'':		/* single quote */
-			*store = *fmt;
-			break;
-		case 'a':		/* bell/alert */
-			*store = '\a';
-			break;
-		case 'b':		/* backspace */
-			*store = '\b';
-			break;
-		case 'c':
-			if (!percent) {
-				*store = '\0';
-				*len = store - save;
-				return (1);
-			}
-			*store = 'c';
-			break;
-		case 'f':		/* form-feed */
-			*store = '\f';
-			break;
-		case 'n':		/* newline */
-			*store = '\n';
-			break;
-		case 'r':		/* carriage-return */
-			*store = '\r';
-			break;
-		case 't':		/* horizontal tab */
-			*store = '\t';
-			break;
-		case 'v':		/* vertical tab */
-			*store = '\v';
-			break;
-					/* octal constant */
-		case '0': case '1': case '2': case '3':
-		case '4': case '5': case '6': case '7':
-			c = (!percent && *fmt == '0') ? 4 : 3;
-			for (value = 0;
-			    c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) {
-				value <<= 3;
-				value += *fmt - '0';
-			}
-			--fmt;
-			if (percent && value == '%') {
-				*store++ = '%';
-				*store = '%';
-			} else
-				*store = (char)value;
-			break;
-		default:
-			*store = *fmt;
-			break;
-		}
-	}
-	*store = '\0';
-	*len = store - save;
-	return (0);
-}
-
-static int
-getchr(void)
-{
-	if (!*gargv)
-		return ('\0');
-	return ((int)**gargv++);
-}
-
-static const char *
-getstr(void)
-{
-	if (!*gargv)
-		return ("");
-	return (*gargv++);
-}
-
-static int
-getint(int *ip)
-{
-	intmax_t val;
-	uintmax_t uval;
-	int rval;
-
-	if (getnum(&val, &uval, 1))
-		return (1);
-	rval = 0;
-	if (val < INT_MIN || val > INT_MAX) {
-		warnx("%s: %s", *gargv, strerror(ERANGE));
-		rval = 1;
-	}
-	*ip = (int)val;
-	return (rval);
-}
-
-static int
-getnum(intmax_t *ip, uintmax_t *uip, int signedconv)
-{
-	char *ep;
-	int rval;
-
-	if (!*gargv) {
-		*ip = *uip = 0;
-		return (0);
-	}
-	if (**gargv == '"' || **gargv == '\'') {
-		if (signedconv)
-			*ip = asciicode();
-		else
-			*uip = asciicode();
-		return (0);
-	}
-	rval = 0;
-	errno = 0;
-	if (signedconv)
-		*ip = strtoimax(*gargv, &ep, 0);
-	else
-		*uip = strtoumax(*gargv, &ep, 0);
-	if (ep == *gargv) {
-		warnx("%s: expected numeric value", *gargv);
-		rval = 1;
-	}
-	else if (*ep != '\0') {
-		warnx("%s: not completely converted", *gargv);
-		rval = 1;
-	}
-	if (errno == ERANGE) {
-		warnx("%s: %s", *gargv, strerror(ERANGE));
-		rval = 1;
-	}
-	++gargv;
-	return (rval);
-}
-
-static int
-getfloating(long double *dp, int mod_ldbl)
-{
-	char *ep;
-	int rval;
-
-	if (!*gargv) {
-		*dp = 0.0;
-		return (0);
-	}
-	if (**gargv == '"' || **gargv == '\'') {
-		*dp = asciicode();
-		return (0);
-	}
-	rval = 0;
-	errno = 0;
-	if (mod_ldbl)
-		*dp = strtold(*gargv, &ep);
-	else
-		*dp = strtod(*gargv, &ep);
-	if (ep == *gargv) {
-		warnx("%s: expected numeric value", *gargv);
-		rval = 1;
-	} else if (*ep != '\0') {
-		warnx("%s: not completely converted", *gargv);
-		rval = 1;
-	}
-	if (errno == ERANGE) {
-		warnx("%s: %s", *gargv, strerror(ERANGE));
-		rval = 1;
-	}
-	++gargv;
-	return (rval);
-}
-
-static int
-asciicode(void)
-{
-	int ch;
-	wchar_t wch;
-	mbstate_t mbs;
-
-	ch = (unsigned char)**gargv;
-	if (ch == '\'' || ch == '"') {
-		memset(&mbs, 0, sizeof(mbs));
-		switch (mbrtowc(&wch, *gargv + 1, MB_LEN_MAX, &mbs)) {
-		case (size_t)-2:
-		case (size_t)-1:
-			wch = (unsigned char)gargv[0][1];
-			break;
-		case 0:
-			wch = 0;
-			break;
-		}
-		ch = wch;
-	}
-	++gargv;
-	return (ch);
-}
-
-static void
-usage(void)
-{
-	(void)fprintf(stderr, "usage: printf format [arguments ...]\n");
-}
diff --git a/bin/1sh/redir.c b/bin/1sh/redir.c
deleted file mode 100644
index 616053cf..00000000
--- a/bin/1sh/redir.c
+++ /dev/null
@@ -1,365 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)redir.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/redir.c 326025 2017-11-20 19:49:47Z pfg $");
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <signal.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-/*
- * Code for dealing with input/output redirection.
- */
-
-#include "shell.h"
-#include "nodes.h"
-#include "jobs.h"
-#include "expand.h"
-#include "redir.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "options.h"
-
-
-#define EMPTY -2		/* marks an unused slot in redirtab */
-#define CLOSED -1		/* fd was not open before redir */
-
-
-struct redirtab {
-	struct redirtab *next;
-	int renamed[10];
-	int fd0_redirected;
-	unsigned int empty_redirs;
-};
-
-
-static struct redirtab *redirlist;
-
-/*
- * We keep track of whether or not fd0 has been redirected.  This is for
- * background commands, where we want to redirect fd0 to /dev/null only
- * if it hasn't already been redirected.
-*/
-static int fd0_redirected = 0;
-
-/* Number of redirtabs that have not been allocated. */
-static unsigned int empty_redirs = 0;
-
-static void openredirect(union node *, char[10 ]);
-static int openhere(union node *);
-
-
-/*
- * Process a list of redirection commands.  If the REDIR_PUSH flag is set,
- * old file descriptors are stashed away so that the redirection can be
- * undone by calling popredir.  If the REDIR_BACKQ flag is set, then the
- * standard output, and the standard error if it becomes a duplicate of
- * stdout, is saved in memory.
-*
- * We suppress interrupts so that we won't leave open file
- * descriptors around.  Because the signal handler remains
- * installed and we do not use system call restart, interrupts
- * will still abort blocking opens such as fifos (they will fail
- * with EINTR). There is, however, a race condition if an interrupt
- * arrives after INTOFF and before open blocks.
- */
-
-void
-redirect(union node *redir, int flags)
-{
-	union node *n;
-	struct redirtab *sv = NULL;
-	int i;
-	int fd;
-	char memory[10];	/* file descriptors to write to memory */
-
-	INTOFF;
-	for (i = 10 ; --i >= 0 ; )
-		memory[i] = 0;
-	memory[1] = flags & REDIR_BACKQ;
-	if (flags & REDIR_PUSH) {
-		empty_redirs++;
-		if (redir != NULL) {
-			sv = ckmalloc(sizeof (struct redirtab));
-			for (i = 0 ; i < 10 ; i++)
-				sv->renamed[i] = EMPTY;
-			sv->fd0_redirected = fd0_redirected;
-			sv->empty_redirs = empty_redirs - 1;
-			sv->next = redirlist;
-			redirlist = sv;
-			empty_redirs = 0;
-		}
-	}
-	for (n = redir ; n ; n = n->nfile.next) {
-		fd = n->nfile.fd;
-		if (fd == 0)
-			fd0_redirected = 1;
-		if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
-		    n->ndup.dupfd == fd)
-			continue; /* redirect from/to same file descriptor */
-
-		if ((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) {
-			INTOFF;
-			if ((i = fcntl(fd, F_DUPFD_CLOEXEC, 10)) == -1) {
-				switch (errno) {
-				case EBADF:
-					i = CLOSED;
-					break;
-				default:
-					INTON;
-					error("%d: %s", fd, strerror(errno));
-					break;
-				}
-			}
-			sv->renamed[fd] = i;
-			INTON;
-		}
-		openredirect(n, memory);
-		INTON;
-		INTOFF;
-	}
-	if (memory[1])
-		out1 = &memout;
-	if (memory[2])
-		out2 = &memout;
-	INTON;
-}
-
-
-static void
-openredirect(union node *redir, char memory[10])
-{
-	struct stat sb;
-	int fd = redir->nfile.fd;
-	const char *fname;
-	int f;
-	int e;
-
-	memory[fd] = 0;
-	switch (redir->nfile.type) {
-	case NFROM:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_RDONLY)) < 0)
-			error("cannot open %s: %s", fname, strerror(errno));
-		break;
-	case NFROMTO:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_RDWR|O_CREAT, 0666)) < 0)
-			error("cannot create %s: %s", fname, strerror(errno));
-		break;
-	case NTO:
-		if (Cflag) {
-			fname = redir->nfile.expfname;
-			if (stat(fname, &sb) == -1) {
-				if ((f = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0666)) < 0)
-					error("cannot create %s: %s", fname, strerror(errno));
-			} else if (!S_ISREG(sb.st_mode)) {
-				if ((f = open(fname, O_WRONLY, 0666)) < 0)
-					error("cannot create %s: %s", fname, strerror(errno));
-				if (fstat(f, &sb) != -1 && S_ISREG(sb.st_mode)) {
-					close(f);
-					error("cannot create %s: %s", fname,
-					    strerror(EEXIST));
-				}
-			} else
-				error("cannot create %s: %s", fname,
-				    strerror(EEXIST));
-			break;
-		}
-		/* FALLTHROUGH */
-	case NCLOBBER:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
-			error("cannot create %s: %s", fname, strerror(errno));
-		break;
-	case NAPPEND:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
-			error("cannot create %s: %s", fname, strerror(errno));
-		break;
-	case NTOFD:
-	case NFROMFD:
-		if (redir->ndup.dupfd >= 0) {	/* if not ">&-" */
-			if (memory[redir->ndup.dupfd])
-				memory[fd] = 1;
-			else {
-				if (dup2(redir->ndup.dupfd, fd) < 0)
-					error("%d: %s", redir->ndup.dupfd,
-							strerror(errno));
-			}
-		} else {
-			close(fd);
-		}
-		return;
-	case NHERE:
-	case NXHERE:
-		f = openhere(redir);
-		break;
-	default:
-		abort();
-	}
-	if (f != fd) {
-		if (dup2(f, fd) == -1) {
-			e = errno;
-			close(f);
-			error("%d: %s", fd, strerror(e));
-		}
-		close(f);
-	}
-}
-
-
-/*
- * Handle here documents.  Normally we fork off a process to write the
- * data to a pipe.  If the document is short, we can stuff the data in
- * the pipe without forking.
- */
-
-static int
-openhere(union node *redir)
-{
-	const char *p;
-	int pip[2];
-	size_t len = 0;
-	int flags;
-	ssize_t written = 0;
-
-	if (pipe(pip) < 0)
-		error("Pipe call failed: %s", strerror(errno));
-
-	if (redir->type == NXHERE)
-		p = redir->nhere.expdoc;
-	else
-		p = redir->nhere.doc->narg.text;
-	len = strlen(p);
-	if (len == 0)
-		goto out;
-	flags = fcntl(pip[1], F_GETFL, 0);
-	if (flags != -1 && fcntl(pip[1], F_SETFL, flags | O_NONBLOCK) != -1) {
-		written = write(pip[1], p, len);
-		if (written < 0)
-			written = 0;
-		if ((size_t)written == len)
-			goto out;
-		fcntl(pip[1], F_SETFL, flags);
-	}
-
-	if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
-		close(pip[0]);
-		signal(SIGINT, SIG_IGN);
-		signal(SIGQUIT, SIG_IGN);
-		signal(SIGHUP, SIG_IGN);
-		signal(SIGTSTP, SIG_IGN);
-		signal(SIGPIPE, SIG_DFL);
-		xwrite(pip[1], p + written, len - written);
-		_exit(0);
-	}
-out:
-	close(pip[1]);
-	return pip[0];
-}
-
-
-
-/*
- * Undo the effects of the last redirection.
- */
-
-void
-popredir(void)
-{
-	struct redirtab *rp = redirlist;
-	int i;
-
-	INTOFF;
-	if (empty_redirs > 0) {
-		empty_redirs--;
-		INTON;
-		return;
-	}
-	for (i = 0 ; i < 10 ; i++) {
-		if (rp->renamed[i] != EMPTY) {
-			if (rp->renamed[i] >= 0) {
-				dup2(rp->renamed[i], i);
-				close(rp->renamed[i]);
-			} else {
-				close(i);
-			}
-		}
-	}
-	fd0_redirected = rp->fd0_redirected;
-	empty_redirs = rp->empty_redirs;
-	redirlist = rp->next;
-	ckfree(rp);
-	INTON;
-}
-
-/* Return true if fd 0 has already been redirected at least once.  */
-int
-fd0_redirected_p(void)
-{
-        return fd0_redirected != 0;
-}
-
-/*
- * Discard all saved file descriptors.
- */
-
-void
-clearredir(void)
-{
-	struct redirtab *rp;
-	int i;
-
-	for (rp = redirlist ; rp ; rp = rp->next) {
-		for (i = 0 ; i < 10 ; i++) {
-			if (rp->renamed[i] >= 0) {
-				close(rp->renamed[i]);
-			}
-			rp->renamed[i] = EMPTY;
-		}
-	}
-}
diff --git a/bin/1sh/redir.h b/bin/1sh/redir.h
deleted file mode 100644
index 8c171423..00000000
--- a/bin/1sh/redir.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)redir.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/redir.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-/* flags passed to redirect */
-#define REDIR_PUSH 01		/* save previous values of file descriptors */
-#define REDIR_BACKQ 02		/* save the command output in memory */
-
-union node;
-void redirect(union node *, int);
-void popredir(void);
-int fd0_redirected_p(void);
-void clearredir(void);
-
diff --git a/bin/1sh/shell.h b/bin/1sh/shell.h
deleted file mode 100644
index 5e3d60dc..00000000
--- a/bin/1sh/shell.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)shell.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/shell.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-#ifndef SHELL_H_
-#define SHELL_H_
-
-#include <inttypes.h>
-
-/*
- * The follow should be set to reflect the type of system you have:
- *	JOBS -> 1 if you have Berkeley job control, 0 otherwise.
- *	define DEBUG=1 to compile in debugging (set global "debug" to turn on)
- *	define DEBUG=2 to compile in and turn on debugging.
- *
- * When debugging is on, debugging info will be written to ./trace and
- * a quit signal will generate a core dump.
- */
-
-
-#define	JOBS 1
-/* #define DEBUG 1 */
-
-/*
- * Type of used arithmetics. SUSv3 requires us to have at least signed long.
- */
-typedef intmax_t arith_t;
-#define	ARITH_FORMAT_STR  "%" PRIdMAX
-#define	atoarith_t(arg)  strtoimax(arg, NULL, 0)
-#define	strtoarith_t(nptr, endptr, base)  strtoimax(nptr, endptr, base)
-#define	ARITH_MIN INTMAX_MIN
-#define	ARITH_MAX INTMAX_MAX
-
-typedef void *pointer;
-
-#include <sys/cdefs.h>
-
-extern char nullstr[1];		/* null string */
-
-#ifdef DEBUG
-#define TRACE(param)  sh_trace param
-#else
-#define TRACE(param)
-#endif
-
-#endif /* !SHELL_H_ */
diff --git a/bin/1sh/show.c b/bin/1sh/show.c
deleted file mode 100644
index e8a55886..00000000
--- a/bin/1sh/show.c
+++ /dev/null
@@ -1,410 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)show.c	8.3 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/show.c 326025 2017-11-20 19:49:47Z pfg $");
-
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <errno.h>
-
-#include "shell.h"
-#include "parser.h"
-#include "nodes.h"
-#include "mystring.h"
-#include "show.h"
-
-
-#ifdef DEBUG
-static void shtree(union node *, int, char *, FILE*);
-static void shcmd(union node *, FILE *);
-static void sharg(union node *, FILE *);
-static void indent(int, char *, FILE *);
-static void trstring(char *);
-
-
-void
-showtree(union node *n)
-{
-	trputs("showtree called\n");
-	shtree(n, 1, NULL, stdout);
-}
-
-
-static void
-shtree(union node *n, int ind, char *pfx, FILE *fp)
-{
-	struct nodelist *lp;
-	char *s;
-
-	if (n == NULL)
-		return;
-
-	indent(ind, pfx, fp);
-	switch(n->type) {
-	case NSEMI:
-		s = "; ";
-		goto binop;
-	case NAND:
-		s = " && ";
-		goto binop;
-	case NOR:
-		s = " || ";
-binop:
-		shtree(n->nbinary.ch1, ind, NULL, fp);
-	   /*    if (ind < 0) */
-			fputs(s, fp);
-		shtree(n->nbinary.ch2, ind, NULL, fp);
-		break;
-	case NCMD:
-		shcmd(n, fp);
-		if (ind >= 0)
-			putc('\n', fp);
-		break;
-	case NPIPE:
-		for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
-			shcmd(lp->n, fp);
-			if (lp->next)
-				fputs(" | ", fp);
-		}
-		if (n->npipe.backgnd)
-			fputs(" &", fp);
-		if (ind >= 0)
-			putc('\n', fp);
-		break;
-	default:
-		fprintf(fp, "<node type %d>", n->type);
-		if (ind >= 0)
-			putc('\n', fp);
-		break;
-	}
-}
-
-
-
-static void
-shcmd(union node *cmd, FILE *fp)
-{
-	union node *np;
-	int first;
-	char *s;
-	int dftfd;
-
-	first = 1;
-	for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
-		if (! first)
-			putchar(' ');
-		sharg(np, fp);
-		first = 0;
-	}
-	for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
-		if (! first)
-			putchar(' ');
-		switch (np->nfile.type) {
-			case NTO:	s = ">";  dftfd = 1; break;
-			case NAPPEND:	s = ">>"; dftfd = 1; break;
-			case NTOFD:	s = ">&"; dftfd = 1; break;
-			case NCLOBBER:	s = ">|"; dftfd = 1; break;
-			case NFROM:	s = "<";  dftfd = 0; break;
-			case NFROMTO:	s = "<>"; dftfd = 0; break;
-			case NFROMFD:	s = "<&"; dftfd = 0; break;
-			case NHERE:	s = "<<"; dftfd = 0; break;
-			case NXHERE:	s = "<<"; dftfd = 0; break;
-			default:  	s = "*error*"; dftfd = 0; break;
-		}
-		if (np->nfile.fd != dftfd)
-			fprintf(fp, "%d", np->nfile.fd);
-		fputs(s, fp);
-		if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
-			if (np->ndup.dupfd >= 0)
-				fprintf(fp, "%d", np->ndup.dupfd);
-			else
-				fprintf(fp, "-");
-		} else if (np->nfile.type == NHERE) {
-				fprintf(fp, "HERE");
-		} else if (np->nfile.type == NXHERE) {
-				fprintf(fp, "XHERE");
-		} else {
-			sharg(np->nfile.fname, fp);
-		}
-		first = 0;
-	}
-}
-
-
-
-static void
-sharg(union node *arg, FILE *fp)
-{
-	char *p;
-	struct nodelist *bqlist;
-	int subtype;
-
-	if (arg->type != NARG) {
-		printf("<node type %d>\n", arg->type);
-		fflush(stdout);
-		abort();
-	}
-	bqlist = arg->narg.backquote;
-	for (p = arg->narg.text ; *p ; p++) {
-		switch (*p) {
-		case CTLESC:
-			putc(*++p, fp);
-			break;
-		case CTLVAR:
-			putc('$', fp);
-			putc('{', fp);
-			subtype = *++p;
-			if (subtype == VSLENGTH)
-				putc('#', fp);
-
-			while (*p != '=')
-				putc(*p++, fp);
-
-			if (subtype & VSNUL)
-				putc(':', fp);
-
-			switch (subtype & VSTYPE) {
-			case VSNORMAL:
-				putc('}', fp);
-				break;
-			case VSMINUS:
-				putc('-', fp);
-				break;
-			case VSPLUS:
-				putc('+', fp);
-				break;
-			case VSQUESTION:
-				putc('?', fp);
-				break;
-			case VSASSIGN:
-				putc('=', fp);
-				break;
-			case VSTRIMLEFT:
-				putc('#', fp);
-				break;
-			case VSTRIMLEFTMAX:
-				putc('#', fp);
-				putc('#', fp);
-				break;
-			case VSTRIMRIGHT:
-				putc('%', fp);
-				break;
-			case VSTRIMRIGHTMAX:
-				putc('%', fp);
-				putc('%', fp);
-				break;
-			case VSLENGTH:
-				break;
-			default:
-				printf("<subtype %d>", subtype);
-			}
-			break;
-		case CTLENDVAR:
-		     putc('}', fp);
-		     break;
-		case CTLBACKQ:
-		case CTLBACKQ|CTLQUOTE:
-			putc('$', fp);
-			putc('(', fp);
-			shtree(bqlist->n, -1, NULL, fp);
-			putc(')', fp);
-			break;
-		default:
-			putc(*p, fp);
-			break;
-		}
-	}
-}
-
-
-static void
-indent(int amount, char *pfx, FILE *fp)
-{
-	int i;
-
-	for (i = 0 ; i < amount ; i++) {
-		if (pfx && i == amount - 1)
-			fputs(pfx, fp);
-		putc('\t', fp);
-	}
-}
-
-
-/*
- * Debugging stuff.
- */
-
-
-FILE *tracefile;
-
-#if DEBUG >= 2
-int debug = 1;
-#else
-int debug = 0;
-#endif
-
-
-void
-trputc(int c)
-{
-	if (tracefile == NULL)
-		return;
-	putc(c, tracefile);
-	if (c == '\n')
-		fflush(tracefile);
-}
-
-
-void
-sh_trace(const char *fmt, ...)
-{
-	va_list va;
-	va_start(va, fmt);
-	if (tracefile != NULL) {
-		(void) vfprintf(tracefile, fmt, va);
-		if (strchr(fmt, '\n'))
-			(void) fflush(tracefile);
-	}
-	va_end(va);
-}
-
-
-void
-trputs(const char *s)
-{
-	if (tracefile == NULL)
-		return;
-	fputs(s, tracefile);
-	if (strchr(s, '\n'))
-		fflush(tracefile);
-}
-
-
-static void
-trstring(char *s)
-{
-	char *p;
-	char c;
-
-	if (tracefile == NULL)
-		return;
-	putc('"', tracefile);
-	for (p = s ; *p ; p++) {
-		switch (*p) {
-		case '\n':  c = 'n';  goto backslash;
-		case '\t':  c = 't';  goto backslash;
-		case '\r':  c = 'r';  goto backslash;
-		case '"':  c = '"';  goto backslash;
-		case '\\':  c = '\\';  goto backslash;
-		case CTLESC:  c = 'e';  goto backslash;
-		case CTLVAR:  c = 'v';  goto backslash;
-		case CTLVAR+CTLQUOTE:  c = 'V';  goto backslash;
-		case CTLBACKQ:  c = 'q';  goto backslash;
-		case CTLBACKQ+CTLQUOTE:  c = 'Q';  goto backslash;
-backslash:	  putc('\\', tracefile);
-			putc(c, tracefile);
-			break;
-		default:
-			if (*p >= ' ' && *p <= '~')
-				putc(*p, tracefile);
-			else {
-				putc('\\', tracefile);
-				putc(*p >> 6 & 03, tracefile);
-				putc(*p >> 3 & 07, tracefile);
-				putc(*p & 07, tracefile);
-			}
-			break;
-		}
-	}
-	putc('"', tracefile);
-}
-
-
-void
-trargs(char **ap)
-{
-	if (tracefile == NULL)
-		return;
-	while (*ap) {
-		trstring(*ap++);
-		if (*ap)
-			putc(' ', tracefile);
-		else
-			putc('\n', tracefile);
-	}
-	fflush(tracefile);
-}
-
-
-void
-opentrace(void)
-{
-	char s[100];
-	int flags;
-
-	if (!debug)
-		return;
-#ifdef not_this_way
-	{
-		char *p;
-		if ((p = getenv("HOME")) == NULL) {
-			if (geteuid() == 0)
-				p = "/";
-			else
-				p = "/tmp";
-		}
-		strcpy(s, p);
-		strcat(s, "/trace");
-	}
-#else
-	strcpy(s, "./trace");
-#endif /* not_this_way */
-	if ((tracefile = fopen(s, "a")) == NULL) {
-		fprintf(stderr, "Can't open %s: %s\n", s, strerror(errno));
-		return;
-	}
-	if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
-		fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
-	fputs("\nTracing started.\n", tracefile);
-	fflush(tracefile);
-}
-#endif /* DEBUG */
diff --git a/bin/1sh/show.h b/bin/1sh/show.h
deleted file mode 100644
index 587c5ada..00000000
--- a/bin/1sh/show.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1995
- *      The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)show.h	1.1 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/show.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-void showtree(union node *);
-#ifdef DEBUG
-void sh_trace(const char *, ...) __printflike(1, 2);
-void trargs(char **);
-void trputc(int);
-void trputs(const char *);
-void opentrace(void);
-#endif
diff --git a/bin/1sh/test.c b/bin/1sh/test.c
deleted file mode 100644
index a153cdb3..00000000
--- a/bin/1sh/test.c
+++ /dev/null
@@ -1,630 +0,0 @@
-/*	$NetBSD: test.c,v 1.21 1999/04/05 09:48:38 kleink Exp $	*/
-
-/*-
- * test(1); version 7-like  --  author Erik Baalbergen
- * modified by Eric Gisin to be used as built-in.
- * modified by Arnold Robbins to add SVR3 compatibility
- * (-x -c -b -p -u -g -k) plus Korn's -L -nt -ot -ef and new -S (socket).
- * modified by J.T. Conklin for NetBSD.
- *
- * This program is in the Public Domain.
- */
-/*
- * Important: This file is used both as a standalone program /bin/test and
- * as a builtin for /bin/sh (#define SHELL).
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/test/test.c 298232 2016-04-19 00:38:07Z araujo $");
-
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#ifdef SHELL
-#define main testcmd
-#include "bltin.h"
-#else
-#include <locale.h>
-
-static void error(const char *, ...) __dead2 __printf0like(1, 2);
-
-static void
-error(const char *msg, ...)
-{
-	va_list ap;
-	va_start(ap, msg);
-	verrx(2, msg, ap);
-	/*NOTREACHED*/
-	va_end(ap);
-}
-#endif
-
-/* test(1) accepts the following grammar:
-	oexpr	::= aexpr | aexpr "-o" oexpr ;
-	aexpr	::= nexpr | nexpr "-a" aexpr ;
-	nexpr	::= primary | "!" primary
-	primary	::= unary-operator operand
-		| operand binary-operator operand
-		| operand
-		| "(" oexpr ")"
-		;
-	unary-operator ::= "-r"|"-w"|"-x"|"-f"|"-d"|"-c"|"-b"|"-p"|
-		"-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"|"-L"|"-S";
-
-	binary-operator ::= "="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"|
-			"-nt"|"-ot"|"-ef";
-	operand ::= <any legal UNIX file name>
-*/
-
-enum token_types {
-	UNOP = 0x100,
-	BINOP = 0x200,
-	BUNOP = 0x300,
-	BBINOP = 0x400,
-	PAREN = 0x500
-};
-
-enum token {
-	EOI,
-	OPERAND,
-	FILRD = UNOP + 1,
-	FILWR,
-	FILEX,
-	FILEXIST,
-	FILREG,
-	FILDIR,
-	FILCDEV,
-	FILBDEV,
-	FILFIFO,
-	FILSOCK,
-	FILSYM,
-	FILGZ,
-	FILTT,
-	FILSUID,
-	FILSGID,
-	FILSTCK,
-	STREZ,
-	STRNZ,
-	FILUID,
-	FILGID,
-	FILNT = BINOP + 1,
-	FILOT,
-	FILEQ,
-	STREQ,
-	STRNE,
-	STRLT,
-	STRGT,
-	INTEQ,
-	INTNE,
-	INTGE,
-	INTGT,
-	INTLE,
-	INTLT,
-	UNOT = BUNOP + 1,
-	BAND = BBINOP + 1,
-	BOR,
-	LPAREN = PAREN + 1,
-	RPAREN
-};
-
-#define TOKEN_TYPE(token) ((token) & 0xff00)
-
-static const struct t_op {
-	char op_text[2];
-	short op_num;
-} ops1[] = {
-	{"=",	STREQ},
-	{"<",	STRLT},
-	{">",	STRGT},
-	{"!",	UNOT},
-	{"(",	LPAREN},
-	{")",	RPAREN},
-}, opsm1[] = {
-	{"r",	FILRD},
-	{"w",	FILWR},
-	{"x",	FILEX},
-	{"e",	FILEXIST},
-	{"f",	FILREG},
-	{"d",	FILDIR},
-	{"c",	FILCDEV},
-	{"b",	FILBDEV},
-	{"p",	FILFIFO},
-	{"u",	FILSUID},
-	{"g",	FILSGID},
-	{"k",	FILSTCK},
-	{"s",	FILGZ},
-	{"t",	FILTT},
-	{"z",	STREZ},
-	{"n",	STRNZ},
-	{"h",	FILSYM},		/* for backwards compat */
-	{"O",	FILUID},
-	{"G",	FILGID},
-	{"L",	FILSYM},
-	{"S",	FILSOCK},
-	{"a",	BAND},
-	{"o",	BOR},
-}, ops2[] = {
-	{"==",	STREQ},
-	{"!=",	STRNE},
-}, opsm2[] = {
-	{"eq",	INTEQ},
-	{"ne",	INTNE},
-	{"ge",	INTGE},
-	{"gt",	INTGT},
-	{"le",	INTLE},
-	{"lt",	INTLT},
-	{"nt",	FILNT},
-	{"ot",	FILOT},
-	{"ef",	FILEQ},
-};
-
-static int nargc;
-static char **t_wp;
-static int parenlevel;
-
-static int	aexpr(enum token);
-static int	binop(enum token);
-static int	equalf(const char *, const char *);
-static int	filstat(char *, enum token);
-static int	getn(const char *);
-static intmax_t	getq(const char *);
-static int	intcmp(const char *, const char *);
-static int	isunopoperand(void);
-static int	islparenoperand(void);
-static int	isrparenoperand(void);
-static int	newerf(const char *, const char *);
-static int	nexpr(enum token);
-static int	oexpr(enum token);
-static int	olderf(const char *, const char *);
-static int	primary(enum token);
-static void	syntax(const char *, const char *);
-static enum	token t_lex(char *);
-
-int
-main(int argc, char **argv)
-{
-	int	res;
-	char	*p;
-
-	if ((p = strrchr(argv[0], '/')) == NULL)
-		p = argv[0];
-	else
-		p++;
-	if (strcmp(p, "[") == 0) {
-		if (strcmp(argv[--argc], "]") != 0)
-			error("missing ]");
-		argv[argc] = NULL;
-	}
-
-	/* no expression => false */
-	if (--argc <= 0)
-		return 1;
-
-#ifndef SHELL
-	(void)setlocale(LC_CTYPE, "");
-#endif
-	nargc = argc;
-	t_wp = &argv[1];
-	parenlevel = 0;
-	if (nargc == 4 && strcmp(*t_wp, "!") == 0) {
-		/* Things like ! "" -o x do not fit in the normal grammar. */
-		--nargc;
-		++t_wp;
-		res = oexpr(t_lex(*t_wp));
-	} else
-		res = !oexpr(t_lex(*t_wp));
-
-	if (--nargc > 0)
-		syntax(*t_wp, "unexpected operator");
-
-	return res;
-}
-
-static void
-syntax(const char *op, const char *msg)
-{
-
-	if (op && *op)
-		error("%s: %s", op, msg);
-	else
-		error("%s", msg);
-}
-
-static int
-oexpr(enum token n)
-{
-	int res;
-
-	res = aexpr(n);
-	if (t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL) == BOR)
-		return oexpr(t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)) ||
-		    res;
-	t_wp--;
-	nargc++;
-	return res;
-}
-
-static int
-aexpr(enum token n)
-{
-	int res;
-
-	res = nexpr(n);
-	if (t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL) == BAND)
-		return aexpr(t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)) &&
-		    res;
-	t_wp--;
-	nargc++;
-	return res;
-}
-
-static int
-nexpr(enum token n)
-{
-	if (n == UNOT)
-		return !nexpr(t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL));
-	return primary(n);
-}
-
-static int
-primary(enum token n)
-{
-	enum token nn;
-	int res;
-
-	if (n == EOI)
-		return 0;		/* missing expression */
-	if (n == LPAREN) {
-		parenlevel++;
-		if ((nn = t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)) ==
-		    RPAREN) {
-			parenlevel--;
-			return 0;	/* missing expression */
-		}
-		res = oexpr(nn);
-		if (t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL) != RPAREN)
-			syntax(NULL, "closing paren expected");
-		parenlevel--;
-		return res;
-	}
-	if (TOKEN_TYPE(n) == UNOP) {
-		/* unary expression */
-		if (--nargc == 0)
-			syntax(NULL, "argument expected"); /* impossible */
-		switch (n) {
-		case STREZ:
-			return strlen(*++t_wp) == 0;
-		case STRNZ:
-			return strlen(*++t_wp) != 0;
-		case FILTT:
-			return isatty(getn(*++t_wp));
-		default:
-			return filstat(*++t_wp, n);
-		}
-	}
-
-	nn = t_lex(nargc > 0 ? t_wp[1] : NULL);
-	if (TOKEN_TYPE(nn) == BINOP)
-		return binop(nn);
-
-	return strlen(*t_wp) > 0;
-}
-
-static int
-binop(enum token n)
-{
-	const char *opnd1, *op, *opnd2;
-
-	opnd1 = *t_wp;
-	op = nargc > 0 ? (--nargc, *++t_wp) : NULL;
-
-	if ((opnd2 = nargc > 0 ? (--nargc, *++t_wp) : NULL) == NULL)
-		syntax(op, "argument expected");
-
-	switch (n) {
-	case STREQ:
-		return strcmp(opnd1, opnd2) == 0;
-	case STRNE:
-		return strcmp(opnd1, opnd2) != 0;
-	case STRLT:
-		return strcmp(opnd1, opnd2) < 0;
-	case STRGT:
-		return strcmp(opnd1, opnd2) > 0;
-	case INTEQ:
-		return intcmp(opnd1, opnd2) == 0;
-	case INTNE:
-		return intcmp(opnd1, opnd2) != 0;
-	case INTGE:
-		return intcmp(opnd1, opnd2) >= 0;
-	case INTGT:
-		return intcmp(opnd1, opnd2) > 0;
-	case INTLE:
-		return intcmp(opnd1, opnd2) <= 0;
-	case INTLT:
-		return intcmp(opnd1, opnd2) < 0;
-	case FILNT:
-		return newerf (opnd1, opnd2);
-	case FILOT:
-		return olderf (opnd1, opnd2);
-	case FILEQ:
-		return equalf (opnd1, opnd2);
-	default:
-		abort();
-		/* NOTREACHED */
-	}
-}
-
-static int
-filstat(char *nm, enum token mode)
-{
-	struct stat s;
-
-	if (mode == FILSYM ? lstat(nm, &s) : stat(nm, &s))
-		return 0;
-
-	switch (mode) {
-	case FILRD:
-		return (faccessat(AT_FDCWD, nm, R_OK, AT_EACCESS) == 0);
-	case FILWR:
-		return (faccessat(AT_FDCWD, nm, W_OK, AT_EACCESS) == 0);
-	case FILEX:
-		/* XXX work around eaccess(2) false positives for superuser */
-		if (faccessat(AT_FDCWD, nm, X_OK, AT_EACCESS) != 0)
-			return 0;
-		if (S_ISDIR(s.st_mode) || geteuid() != 0)
-			return 1;
-		return (s.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) != 0;
-	case FILEXIST:
-		return (faccessat(AT_FDCWD, nm, F_OK, AT_EACCESS) == 0);
-	case FILREG:
-		return S_ISREG(s.st_mode);
-	case FILDIR:
-		return S_ISDIR(s.st_mode);
-	case FILCDEV:
-		return S_ISCHR(s.st_mode);
-	case FILBDEV:
-		return S_ISBLK(s.st_mode);
-	case FILFIFO:
-		return S_ISFIFO(s.st_mode);
-	case FILSOCK:
-		return S_ISSOCK(s.st_mode);
-	case FILSYM:
-		return S_ISLNK(s.st_mode);
-	case FILSUID:
-		return (s.st_mode & S_ISUID) != 0;
-	case FILSGID:
-		return (s.st_mode & S_ISGID) != 0;
-	case FILSTCK:
-		return (s.st_mode & S_ISVTX) != 0;
-	case FILGZ:
-		return s.st_size > (off_t)0;
-	case FILUID:
-		return s.st_uid == geteuid();
-	case FILGID:
-		return s.st_gid == getegid();
-	default:
-		return 1;
-	}
-}
-
-static int
-find_op_1char(const struct t_op *op, const struct t_op *end, const char *s)
-{
-	char c;
-
-	c = s[0];
-	while (op != end) {
-		if (c == *op->op_text)
-			return op->op_num;
-		op++;
-	}
-	return OPERAND;
-}
-
-static int
-find_op_2char(const struct t_op *op, const struct t_op *end, const char *s)
-{
-	while (op != end) {
-		if (s[0] == op->op_text[0] && s[1] == op->op_text[1])
-			return op->op_num;
-		op++;
-	}
-	return OPERAND;
-}
-
-static int
-find_op(const char *s)
-{
-	if (s[0] == '\0')
-		return OPERAND;
-	else if (s[1] == '\0')
-		return find_op_1char(ops1, (&ops1)[1], s);
-	else if (s[2] == '\0')
-		return s[0] == '-' ? find_op_1char(opsm1, (&opsm1)[1], s + 1) :
-		    find_op_2char(ops2, (&ops2)[1], s);
-	else if (s[3] == '\0')
-		return s[0] == '-' ? find_op_2char(opsm2, (&opsm2)[1], s + 1) :
-		    OPERAND;
-	else
-		return OPERAND;
-}
-
-static enum token
-t_lex(char *s)
-{
-	int num;
-
-	if (s == NULL) {
-		return EOI;
-	}
-	num = find_op(s);
-	if (((TOKEN_TYPE(num) == UNOP || TOKEN_TYPE(num) == BUNOP)
-				&& isunopoperand()) ||
-	    (num == LPAREN && islparenoperand()) ||
-	    (num == RPAREN && isrparenoperand()))
-		return OPERAND;
-	return num;
-}
-
-static int
-isunopoperand(void)
-{
-	char *s;
-	char *t;
-	int num;
-
-	if (nargc == 1)
-		return 1;
-	s = *(t_wp + 1);
-	if (nargc == 2)
-		return parenlevel == 1 && strcmp(s, ")") == 0;
-	t = *(t_wp + 2);
-	num = find_op(s);
-	return TOKEN_TYPE(num) == BINOP &&
-	    (parenlevel == 0 || t[0] != ')' || t[1] != '\0');
-}
-
-static int
-islparenoperand(void)
-{
-	char *s;
-	int num;
-
-	if (nargc == 1)
-		return 1;
-	s = *(t_wp + 1);
-	if (nargc == 2)
-		return parenlevel == 1 && strcmp(s, ")") == 0;
-	if (nargc != 3)
-		return 0;
-	num = find_op(s);
-	return TOKEN_TYPE(num) == BINOP;
-}
-
-static int
-isrparenoperand(void)
-{
-	char *s;
-
-	if (nargc == 1)
-		return 0;
-	s = *(t_wp + 1);
-	if (nargc == 2)
-		return parenlevel == 1 && strcmp(s, ")") == 0;
-	return 0;
-}
-
-/* atoi with error detection */
-static int
-getn(const char *s)
-{
-	char *p;
-	long r;
-
-	errno = 0;
-	r = strtol(s, &p, 10);
-
-	if (s == p)
-		error("%s: bad number", s);
-
-	if (errno != 0)
-		error((errno == EINVAL) ? "%s: bad number" :
-					  "%s: out of range", s);
-
-	while (isspace((unsigned char)*p))
-		p++;
-
-	if (*p)
-		error("%s: bad number", s);
-
-	return (int) r;
-}
-
-/* atoi with error detection and 64 bit range */
-static intmax_t
-getq(const char *s)
-{
-	char *p;
-	intmax_t r;
-
-	errno = 0;
-	r = strtoimax(s, &p, 10);
-
-	if (s == p)
-		error("%s: bad number", s);
-
-	if (errno != 0)
-		error((errno == EINVAL) ? "%s: bad number" :
-					  "%s: out of range", s);
-
-	while (isspace((unsigned char)*p))
-		p++;
-
-	if (*p)
-		error("%s: bad number", s);
-
-	return r;
-}
-
-static int
-intcmp (const char *s1, const char *s2)
-{
-	intmax_t q1, q2;
-
-
-	q1 = getq(s1);
-	q2 = getq(s2);
-
-	if (q1 > q2)
-		return 1;
-
-	if (q1 < q2)
-		return -1;
-
-	return 0;
-}
-
-static int
-newerf (const char *f1, const char *f2)
-{
-	struct stat b1, b2;
-
-	if (stat(f1, &b1) != 0 || stat(f2, &b2) != 0)
-		return 0;
-
-	if (b1.st_mtimespec.tv_sec > b2.st_mtimespec.tv_sec)
-		return 1;
-	if (b1.st_mtimespec.tv_sec < b2.st_mtimespec.tv_sec)
-		return 0;
-
-       return (b1.st_mtimespec.tv_nsec > b2.st_mtimespec.tv_nsec);
-}
-
-static int
-olderf (const char *f1, const char *f2)
-{
-	return (newerf(f2, f1));
-}
-
-static int
-equalf (const char *f1, const char *f2)
-{
-	struct stat b1, b2;
-
-	return (stat (f1, &b1) == 0 &&
-		stat (f2, &b2) == 0 &&
-		b1.st_dev == b2.st_dev &&
-		b1.st_ino == b2.st_ino);
-}
diff --git a/bin/1sh/trap.c b/bin/1sh/trap.c
deleted file mode 100644
index 93c063e1..00000000
--- a/bin/1sh/trap.c
+++ /dev/null
@@ -1,553 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)trap.c	8.5 (Berkeley) 6/5/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/trap.c 326025 2017-11-20 19:49:47Z pfg $");
-
-#include <signal.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"	/* for other headers */
-#include "eval.h"
-#include "jobs.h"
-#include "show.h"
-#include "options.h"
-#include "syntax.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "trap.h"
-#include "mystring.h"
-#include "builtins.h"
-#include "myhistedit.h"
-
-
-/*
- * Sigmode records the current value of the signal handlers for the various
- * modes.  A value of zero means that the current handler is not known.
- * S_HARD_IGN indicates that the signal was ignored on entry to the shell,
- */
-
-#define S_DFL 1			/* default signal handling (SIG_DFL) */
-#define S_CATCH 2		/* signal is caught */
-#define S_IGN 3			/* signal is ignored (SIG_IGN) */
-#define S_HARD_IGN 4		/* signal is ignored permanently */
-#define S_RESET 5		/* temporary - to reset a hard ignored sig */
-
-
-static char sigmode[NSIG];	/* current value of signal */
-volatile sig_atomic_t pendingsig;	/* indicates some signal received */
-volatile sig_atomic_t pendingsig_waitcmd;	/* indicates wait builtin should be interrupted */
-static int in_dotrap;			/* do we execute in a trap handler? */
-static char *volatile trap[NSIG];	/* trap handler commands */
-static volatile sig_atomic_t gotsig[NSIG];
-				/* indicates specified signal received */
-static int ignore_sigchld;	/* Used while handling SIGCHLD traps. */
-static int last_trapsig;
-
-static int exiting;		/* exitshell() has been called */
-static int exiting_exitstatus;	/* value passed to exitshell() */
-
-static int getsigaction(int, sig_t *);
-
-
-/*
- * Map a string to a signal number.
- *
- * Note: the signal number may exceed NSIG.
- */
-static int
-sigstring_to_signum(char *sig)
-{
-
-	if (is_number(sig)) {
-		int signo;
-
-		signo = atoi(sig);
-		return ((signo >= 0 && signo < NSIG) ? signo : (-1));
-	} else if (strcasecmp(sig, "EXIT") == 0) {
-		return (0);
-	} else {
-		int n;
-
-		if (strncasecmp(sig, "SIG", 3) == 0)
-			sig += 3;
-		for (n = 1; n < NSIG; n++)
-			if (sys_signame[n] &&
-			    strcasecmp(sys_signame[n], sig) == 0)
-				return (n);
-	}
-	return (-1);
-}
-
-
-/*
- * Print a list of valid signal names.
- */
-static void
-printsignals(void)
-{
-	int n, outlen;
-
-	outlen = 0;
-	for (n = 1; n < NSIG; n++) {
-		if (sys_signame[n]) {
-			out1fmt("%s", sys_signame[n]);
-			outlen += strlen(sys_signame[n]);
-		} else {
-			out1fmt("%d", n);
-			outlen += 3;	/* good enough */
-		}
-		++outlen;
-		if (outlen > 71 || n == NSIG - 1) {
-			out1str("\n");
-			outlen = 0;
-		} else {
-			out1c(' ');
-		}
-	}
-}
-
-
-/*
- * The trap builtin.
- */
-int
-trapcmd(int argc __unused, char **argv)
-{
-	char *action;
-	int signo;
-	int errors = 0;
-	int i;
-
-	while ((i = nextopt("l")) != '\0') {
-		switch (i) {
-		case 'l':
-			printsignals();
-			return (0);
-		}
-	}
-	argv = argptr;
-
-	if (*argv == NULL) {
-		for (signo = 0 ; signo < NSIG ; signo++) {
-			if (signo < NSIG && trap[signo] != NULL) {
-				out1str("trap -- ");
-				out1qstr(trap[signo]);
-				if (signo == 0) {
-					out1str(" EXIT\n");
-				} else if (sys_signame[signo]) {
-					out1fmt(" %s\n", sys_signame[signo]);
-				} else {
-					out1fmt(" %d\n", signo);
-				}
-			}
-		}
-		return 0;
-	}
-	action = NULL;
-	if (*argv && !is_number(*argv)) {
-		if (strcmp(*argv, "-") == 0)
-			argv++;
-		else {
-			action = *argv;
-			argv++;
-		}
-	}
-	for (; *argv; argv++) {
-		if ((signo = sigstring_to_signum(*argv)) == -1) {
-			warning("bad signal %s", *argv);
-			errors = 1;
-			continue;
-		}
-		INTOFF;
-		if (action)
-			action = savestr(action);
-		if (trap[signo])
-			ckfree(trap[signo]);
-		trap[signo] = action;
-		if (signo != 0)
-			setsignal(signo);
-		INTON;
-	}
-	return errors;
-}
-
-
-/*
- * Clear traps on a fork.
- */
-void
-clear_traps(void)
-{
-	char *volatile *tp;
-
-	for (tp = trap ; tp <= &trap[NSIG - 1] ; tp++) {
-		if (*tp && **tp) {	/* trap not NULL or SIG_IGN */
-			INTOFF;
-			ckfree(*tp);
-			*tp = NULL;
-			if (tp != &trap[0])
-				setsignal(tp - trap);
-			INTON;
-		}
-	}
-}
-
-
-/*
- * Check if we have any traps enabled.
- */
-int
-have_traps(void)
-{
-	char *volatile *tp;
-
-	for (tp = trap ; tp <= &trap[NSIG - 1] ; tp++) {
-		if (*tp && **tp)	/* trap not NULL or SIG_IGN */
-			return 1;
-	}
-	return 0;
-}
-
-/*
- * Set the signal handler for the specified signal.  The routine figures
- * out what it should be set to.
- */
-void
-setsignal(int signo)
-{
-	int action;
-	sig_t sigact = SIG_DFL;
-	struct sigaction sa;
-	char *t;
-
-	if ((t = trap[signo]) == NULL)
-		action = S_DFL;
-	else if (*t != '\0')
-		action = S_CATCH;
-	else
-		action = S_IGN;
-	if (action == S_DFL) {
-		switch (signo) {
-		case SIGINT:
-			action = S_CATCH;
-			break;
-		case SIGQUIT:
-#ifdef DEBUG
-			{
-			extern int debug;
-
-			if (debug)
-				break;
-			}
-#endif
-			action = S_CATCH;
-			break;
-		case SIGTERM:
-			if (rootshell && iflag)
-				action = S_IGN;
-			break;
-#if JOBS
-		case SIGTSTP:
-		case SIGTTOU:
-			if (rootshell && mflag)
-				action = S_IGN;
-			break;
-#endif
-		}
-	}
-
-	t = &sigmode[signo];
-	if (*t == 0) {
-		/*
-		 * current setting unknown
-		 */
-		if (!getsigaction(signo, &sigact)) {
-			/*
-			 * Pretend it worked; maybe we should give a warning
-			 * here, but other shells don't. We don't alter
-			 * sigmode, so that we retry every time.
-			 */
-			return;
-		}
-		if (sigact == SIG_IGN) {
-			if (mflag && (signo == SIGTSTP ||
-			     signo == SIGTTIN || signo == SIGTTOU)) {
-				*t = S_IGN;	/* don't hard ignore these */
-			} else
-				*t = S_HARD_IGN;
-		} else {
-			*t = S_RESET;	/* force to be set */
-		}
-	}
-	if (*t == S_HARD_IGN || *t == action)
-		return;
-	switch (action) {
-		case S_DFL:	sigact = SIG_DFL;	break;
-		case S_CATCH:  	sigact = onsig;		break;
-		case S_IGN:	sigact = SIG_IGN;	break;
-	}
-	*t = action;
-	sa.sa_handler = sigact;
-	sa.sa_flags = 0;
-	sigemptyset(&sa.sa_mask);
-	sigaction(signo, &sa, NULL);
-}
-
-
-/*
- * Return the current setting for sig w/o changing it.
- */
-static int
-getsigaction(int signo, sig_t *sigact)
-{
-	struct sigaction sa;
-
-	if (sigaction(signo, (struct sigaction *)0, &sa) == -1)
-		return 0;
-	*sigact = (sig_t) sa.sa_handler;
-	return 1;
-}
-
-
-/*
- * Ignore a signal.
- */
-void
-ignoresig(int signo)
-{
-
-	if (sigmode[signo] == 0)
-		setsignal(signo);
-	if (sigmode[signo] != S_IGN && sigmode[signo] != S_HARD_IGN) {
-		signal(signo, SIG_IGN);
-		sigmode[signo] = S_IGN;
-	}
-}
-
-
-int
-issigchldtrapped(void)
-{
-
-	return (trap[SIGCHLD] != NULL && *trap[SIGCHLD] != '\0');
-}
-
-
-/*
- * Signal handler.
- */
-void
-onsig(int signo)
-{
-
-	if (signo == SIGINT && trap[SIGINT] == NULL) {
-		/*
-		 * The !in_dotrap here is safe.  The only way we can arrive
-		 * here with in_dotrap set is that a trap handler set SIGINT to
-		 * SIG_DFL and killed itself.
-		 */
-		if (suppressint && !in_dotrap)
-			SET_PENDING_INT;
-		else
-			onint();
-		return;
-	}
-
-	/* If we are currently in a wait builtin, prepare to break it */
-	if (signo == SIGINT || signo == SIGQUIT)
-		pendingsig_waitcmd = signo;
-
-	if (trap[signo] != NULL && trap[signo][0] != '\0' &&
-	    (signo != SIGCHLD || !ignore_sigchld)) {
-		gotsig[signo] = 1;
-		pendingsig = signo;
-		pendingsig_waitcmd = signo;
-	}
-}
-
-
-/*
- * Called to execute a trap.  Perhaps we should avoid entering new trap
- * handlers while we are executing a trap handler.
- */
-void
-dotrap(void)
-{
-	struct stackmark smark;
-	int i;
-	int savestatus, prev_evalskip, prev_skipcount;
-
-	in_dotrap++;
-	for (;;) {
-		pendingsig = 0;
-		pendingsig_waitcmd = 0;
-		for (i = 1; i < NSIG; i++) {
-			if (gotsig[i]) {
-				gotsig[i] = 0;
-				if (trap[i]) {
-					/*
-					 * Ignore SIGCHLD to avoid infinite
-					 * recursion if the trap action does
-					 * a fork.
-					 */
-					if (i == SIGCHLD)
-						ignore_sigchld++;
-
-					/*
-					 * Backup current evalskip
-					 * state and reset it before
-					 * executing a trap, so that the
-					 * trap is not disturbed by an
-					 * ongoing break/continue/return
-					 * statement.
-					 */
-					prev_evalskip  = evalskip;
-					prev_skipcount = skipcount;
-					evalskip = 0;
-
-					last_trapsig = i;
-					savestatus = exitstatus;
-					setstackmark(&smark);
-					evalstring(stsavestr(trap[i]), 0);
-					popstackmark(&smark);
-
-					/*
-					 * If such a command was not
-					 * already in progress, allow a
-					 * break/continue/return in the
-					 * trap action to have an effect
-					 * outside of it.
-					 */
-					if (evalskip == 0 ||
-					    prev_evalskip != 0) {
-						evalskip  = prev_evalskip;
-						skipcount = prev_skipcount;
-						exitstatus = savestatus;
-					}
-
-					if (i == SIGCHLD)
-						ignore_sigchld--;
-				}
-				break;
-			}
-		}
-		if (i >= NSIG)
-			break;
-	}
-	in_dotrap--;
-}
-
-
-/*
- * Controls whether the shell is interactive or not based on iflag.
- */
-void
-setinteractive(void)
-{
-	setsignal(SIGINT);
-	setsignal(SIGQUIT);
-	setsignal(SIGTERM);
-}
-
-
-/*
- * Called to exit the shell.
- */
-void
-exitshell(int status)
-{
-	TRACE(("exitshell(%d) pid=%d\n", status, getpid()));
-	exiting = 1;
-	exiting_exitstatus = status;
-	exitshell_savedstatus();
-}
-
-void
-exitshell_savedstatus(void)
-{
-	struct jmploc loc1, loc2;
-	char *p;
-	int sig = 0;
-	sigset_t sigs;
-
-	if (!exiting) {
-		if (in_dotrap && last_trapsig) {
-			sig = last_trapsig;
-			exiting_exitstatus = sig + 128;
-		} else
-			exiting_exitstatus = oexitstatus;
-	}
-	exitstatus = oexitstatus = exiting_exitstatus;
-	if (!setjmp(loc1.loc)) {
-		handler = &loc1;
-		if ((p = trap[0]) != NULL && *p != '\0') {
-			/*
-			 * Reset evalskip, or the trap on EXIT could be
-			 * interrupted if the last command was a "return".
-			 */
-			evalskip = 0;
-			trap[0] = NULL;
-			FORCEINTON;
-			evalstring(p, 0);
-		}
-	}
-	if (!setjmp(loc2.loc)) {
-		handler = &loc2;		/* probably unnecessary */
-		FORCEINTON;
-		flushall();
-#if JOBS
-		setjobctl(0);
-#endif
-	}
-	if (sig != 0 && sig != SIGSTOP && sig != SIGTSTP && sig != SIGTTIN &&
-	    sig != SIGTTOU) {
-		signal(sig, SIG_DFL);
-		sigemptyset(&sigs);
-		sigaddset(&sigs, sig);
-		sigprocmask(SIG_UNBLOCK, &sigs, NULL);
-		kill(getpid(), sig);
-		/* If the default action is to ignore, fall back to _exit(). */
-	}
-	_exit(exiting_exitstatus);
-}
diff --git a/bin/1sh/trap.h b/bin/1sh/trap.h
deleted file mode 100644
index 2898c594..00000000
--- a/bin/1sh/trap.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)trap.h	8.3 (Berkeley) 6/5/95
- * $FreeBSD: releng/12.0/bin/sh/trap.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-extern volatile sig_atomic_t pendingsig;
-extern volatile sig_atomic_t pendingsig_waitcmd;
-
-void clear_traps(void);
-int have_traps(void);
-void setsignal(int);
-void ignoresig(int);
-int issigchldtrapped(void);
-void onsig(int);
-void dotrap(void);
-void setinteractive(void);
-void exitshell(int) __dead2;
-void exitshell_savedstatus(void) __dead2;
diff --git a/bin/1sh/var.c b/bin/1sh/var.c
deleted file mode 100644
index 2c006c0e..00000000
--- a/bin/1sh/var.c
+++ /dev/null
@@ -1,973 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)var.c	8.3 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: releng/12.0/bin/sh/var.c 329221 2018-02-13 16:48:57Z bdrewery $");
-
-#include <unistd.h>
-#include <stdlib.h>
-#include <paths.h>
-
-/*
- * Shell variables.
- */
-
-#include <locale.h>
-#include <langinfo.h>
-
-#include "shell.h"
-#include "output.h"
-#include "expand.h"
-#include "nodes.h"	/* for other headers */
-#include "eval.h"	/* defines cmdenviron */
-#include "exec.h"
-#include "syntax.h"
-#include "options.h"
-#include "mail.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "parser.h"
-#include "builtins.h"
-#ifndef NO_HISTORY
-#include "myhistedit.h"
-#endif
-
-
-#ifndef VTABSIZE
-#define VTABSIZE 39
-#endif
-
-
-struct varinit {
-	struct var *var;
-	int flags;
-	const char *text;
-	void (*func)(const char *);
-};
-
-
-#ifndef NO_HISTORY
-struct var vhistfile;
-struct var vhistsize;
-struct var vterm;
-#endif
-struct var vifs;
-struct var vmail;
-struct var vmpath;
-struct var vpath;
-struct var vps0;
-struct var vps1;
-struct var vps2;
-struct var vps4;
-struct var vrps1;
-struct var vrps2;
-static struct var voptind;
-struct var vdisvfork;
-
-struct localvar *localvars;
-int forcelocal;
-
-static const struct varinit varinit[] = {
-#ifndef NO_HISTORY
-	{ &vhistfile,	VUNSET,				"HISTFILE=",
-	  sethistfile },
-	{ &vhistsize,	VUNSET,				"HISTSIZE=",
-	  sethistsize },
-#endif
-	{ &vifs,	0,				"IFS= \t\n",
-	  NULL },
-	{ &vmail,	VUNSET,				"MAIL=",
-	  NULL },
-	{ &vmpath,	VUNSET,				"MAILPATH=",
-	  NULL },
-	{ &vpath,	0,				"PATH=" _PATH_DEFPATH,
-	  changepath },
-	{ &vps0,	VUNSET,				"PS0=",
-	  NULL },
-	{ &vps1,	0,				"PS1=\\$ ",
-	  NULL },
-	{ &vps2,	0,				"PS2=> ",
-	  NULL },
-	{ &vps4,	0,				"PS4=+ ",
-	  NULL },
-	{ &vrps1,	VUNSET,				"RPS1=",
-	  NULL },
-	{ &vrps2,	VUNSET,				"RPS2=",
-	  NULL },
-#ifndef NO_HISTORY
-	{ &vterm,	VUNSET,				"TERM=",
-	  setterm },
-#endif
-	{ &voptind,	0,				"OPTIND=1",
-	  getoptsreset },
-	{ &vdisvfork,	VUNSET,				"SH_DISABLE_VFORK=",
-	  NULL },
-	{ NULL,	0,				NULL,
-	  NULL }
-};
-
-static struct var *vartab[VTABSIZE];
-
-static const char *const locale_names[7] = {
-	"LC_COLLATE", "LC_CTYPE", "LC_MONETARY",
-	"LC_NUMERIC", "LC_TIME", "LC_MESSAGES", NULL
-};
-static const int locale_categories[7] = {
-	LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC, LC_TIME, LC_MESSAGES, 0
-};
-
-static int varequal(const char *, const char *);
-static struct var *find_var(const char *, struct var ***, int *);
-static int localevar(const char *);
-static void setvareq_const(const char *s, int flags);
-
-extern char **environ;
-
-/*
- * This routine initializes the builtin variables and imports the environment.
- * It is called when the shell is initialized.
- */
-
-void
-initvar(void)
-{
-	char ppid[20];
-	const struct varinit *ip;
-	struct var *vp;
-	struct var **vpp;
-	char **envp;
-
-	for (ip = varinit ; (vp = ip->var) != NULL ; ip++) {
-		if (find_var(ip->text, &vpp, &vp->name_len) != NULL)
-			continue;
-		vp->next = *vpp;
-		*vpp = vp;
-		vp->text = __DECONST(char *, ip->text);
-		vp->flags = ip->flags | VSTRFIXED | VTEXTFIXED;
-		vp->func = ip->func;
-	}
-	fmtstr(ppid, sizeof(ppid), "%d", (int)getppid());
-	setvarsafe("PPID", ppid, 0);
-	for (envp = environ ; *envp ; envp++) {
-		if (strchr(*envp, '=')) {
-			setvareq(*envp, VEXPORT|VTEXTFIXED);
-		}
-	}
-	setvareq_const("OPTIND=1", 0);
-	setvareq_const("IFS= \t\n", 0);
-}
-
-/*
- * Safe version of setvar, returns 1 on success 0 on failure.
- */
-
-int
-setvarsafe(const char *name, const char *val, int flags)
-{
-	struct jmploc jmploc;
-	struct jmploc *const savehandler = handler;
-	int err = 0;
-	int inton;
-
-	inton = is_int_on();
-	if (setjmp(jmploc.loc))
-		err = 1;
-	else {
-		handler = &jmploc;
-		setvar(name, val, flags);
-	}
-	handler = savehandler;
-	SETINTON(inton);
-	return err;
-}
-
-/*
- * Set the value of a variable.  The flags argument is stored with the
- * flags of the variable.  If val is NULL, the variable is unset.
- */
-
-void
-setvar(const char *name, const char *val, int flags)
-{
-	const char *p;
-	size_t len;
-	size_t namelen;
-	size_t vallen;
-	char *nameeq;
-	int isbad;
-
-	isbad = 0;
-	p = name;
-	if (! is_name(*p))
-		isbad = 1;
-	p++;
-	for (;;) {
-		if (! is_in_name(*p)) {
-			if (*p == '\0' || *p == '=')
-				break;
-			isbad = 1;
-		}
-		p++;
-	}
-	namelen = p - name;
-	if (isbad)
-		error("%.*s: bad variable name", (int)namelen, name);
-	len = namelen + 2;		/* 2 is space for '=' and '\0' */
-	if (val == NULL) {
-		flags |= VUNSET;
-		vallen = 0;
-	} else {
-		vallen = strlen(val);
-		len += vallen;
-	}
-	INTOFF;
-	nameeq = ckmalloc(len);
-	memcpy(nameeq, name, namelen);
-	nameeq[namelen] = '=';
-	if (val)
-		memcpy(nameeq + namelen + 1, val, vallen + 1);
-	else
-		nameeq[namelen + 1] = '\0';
-	setvareq(nameeq, flags);
-	INTON;
-}
-
-static int
-localevar(const char *s)
-{
-	const char *const *ss;
-
-	if (*s != 'L')
-		return 0;
-	if (varequal(s + 1, "ANG"))
-		return 1;
-	if (strncmp(s + 1, "C_", 2) != 0)
-		return 0;
-	if (varequal(s + 3, "ALL"))
-		return 1;
-	for (ss = locale_names; *ss ; ss++)
-		if (varequal(s + 3, *ss + 3))
-			return 1;
-	return 0;
-}
-
-
-/*
- * Sets/unsets an environment variable from a pointer that may actually be a
- * pointer into environ where the string should not be manipulated.
- */
-static void
-change_env(const char *s, int set)
-{
-	char *eqp;
-	char *ss;
-
-	INTOFF;
-	ss = savestr(s);
-	if ((eqp = strchr(ss, '=')) != NULL)
-		*eqp = '\0';
-	if (set && eqp != NULL)
-		(void) setenv(ss, eqp + 1, 1);
-	else
-		(void) unsetenv(ss);
-	ckfree(ss);
-	INTON;
-
-	return;
-}
-
-
-/*
- * Same as setvar except that the variable and value are passed in
- * the first argument as name=value.  Since the first argument will
- * be actually stored in the table, it should not be a string that
- * will go away.
- */
-
-void
-setvareq(char *s, int flags)
-{
-	struct var *vp, **vpp;
-	int nlen;
-
-	if (aflag)
-		flags |= VEXPORT;
-	if (forcelocal && !(flags & (VNOSET | VNOLOCAL)))
-		mklocal(s);
-	vp = find_var(s, &vpp, &nlen);
-	if (vp != NULL) {
-		if (vp->flags & VREADONLY) {
-			if ((flags & (VTEXTFIXED|VSTACK)) == 0)
-				ckfree(s);
-			error("%.*s: is read only", vp->name_len, vp->text);
-		}
-		if (flags & VNOSET) {
-			if ((flags & (VTEXTFIXED|VSTACK)) == 0)
-				ckfree(s);
-			return;
-		}
-		INTOFF;
-
-		if (vp->func && (flags & VNOFUNC) == 0)
-			(*vp->func)(s + vp->name_len + 1);
-
-		if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
-			ckfree(vp->text);
-
-		vp->flags &= ~(VTEXTFIXED|VSTACK|VUNSET);
-		vp->flags |= flags;
-		vp->text = s;
-
-		/*
-		 * We could roll this to a function, to handle it as
-		 * a regular variable function callback, but why bother?
-		 *
-		 * Note: this assumes iflag is not set to 1 initially.
-		 * As part of initvar(), this is called before arguments
-		 * are looked at.
-		 */
-		if ((vp == &vmpath || (vp == &vmail && ! mpathset())) &&
-		    iflag == 1)
-			chkmail(1);
-		if ((vp->flags & VEXPORT) && localevar(s)) {
-			change_env(s, 1);
-			(void) setlocale(LC_ALL, "");
-			updatecharset();
-		}
-		INTON;
-		return;
-	}
-	/* not found */
-	if (flags & VNOSET) {
-		if ((flags & (VTEXTFIXED|VSTACK)) == 0)
-			ckfree(s);
-		return;
-	}
-	INTOFF;
-	vp = ckmalloc(sizeof (*vp));
-	vp->flags = flags;
-	vp->text = s;
-	vp->name_len = nlen;
-	vp->next = *vpp;
-	vp->func = NULL;
-	*vpp = vp;
-	if ((vp->flags & VEXPORT) && localevar(s)) {
-		change_env(s, 1);
-		(void) setlocale(LC_ALL, "");
-		updatecharset();
-	}
-	INTON;
-}
-
-
-static void
-setvareq_const(const char *s, int flags)
-{
-	setvareq(__DECONST(char *, s), flags | VTEXTFIXED);
-}
-
-
-/*
- * Process a linked list of variable assignments.
- */
-
-void
-listsetvar(struct arglist *list, int flags)
-{
-	int i;
-
-	INTOFF;
-	for (i = 0; i < list->count; i++)
-		setvareq(savestr(list->args[i]), flags);
-	INTON;
-}
-
-
-
-/*
- * Find the value of a variable.  Returns NULL if not set.
- */
-
-char *
-lookupvar(const char *name)
-{
-	struct var *v;
-
-	v = find_var(name, NULL, NULL);
-	if (v == NULL || v->flags & VUNSET)
-		return NULL;
-	return v->text + v->name_len + 1;
-}
-
-
-
-/*
- * Search the environment of a builtin command.  If the second argument
- * is nonzero, return the value of a variable even if it hasn't been
- * exported.
- */
-
-char *
-bltinlookup(const char *name, int doall)
-{
-	struct var *v;
-	char *result;
-	int i;
-
-	result = NULL;
-	if (cmdenviron) for (i = 0; i < cmdenviron->count; i++) {
-		if (varequal(cmdenviron->args[i], name))
-			result = strchr(cmdenviron->args[i], '=') + 1;
-	}
-	if (result != NULL)
-		return result;
-
-	v = find_var(name, NULL, NULL);
-	if (v == NULL || v->flags & VUNSET ||
-	    (!doall && (v->flags & VEXPORT) == 0))
-		return NULL;
-	return v->text + v->name_len + 1;
-}
-
-
-/*
- * Set up locale for a builtin (LANG/LC_* assignments).
- */
-void
-bltinsetlocale(void)
-{
-	int act = 0;
-	char *loc, *locdef;
-	int i;
-
-	if (cmdenviron) for (i = 0; i < cmdenviron->count; i++) {
-		if (localevar(cmdenviron->args[i])) {
-			act = 1;
-			break;
-		}
-	}
-	if (!act)
-		return;
-	loc = bltinlookup("LC_ALL", 0);
-	INTOFF;
-	if (loc != NULL) {
-		setlocale(LC_ALL, loc);
-		INTON;
-		updatecharset();
-		return;
-	}
-	locdef = bltinlookup("LANG", 0);
-	for (i = 0; locale_names[i] != NULL; i++) {
-		loc = bltinlookup(locale_names[i], 0);
-		if (loc == NULL)
-			loc = locdef;
-		if (loc != NULL)
-			setlocale(locale_categories[i], loc);
-	}
-	INTON;
-	updatecharset();
-}
-
-/*
- * Undo the effect of bltinlocaleset().
- */
-void
-bltinunsetlocale(void)
-{
-	int i;
-
-	INTOFF;
-	if (cmdenviron) for (i = 0; i < cmdenviron->count; i++) {
-		if (localevar(cmdenviron->args[i])) {
-			setlocale(LC_ALL, "");
-			updatecharset();
-			break;
-		}
-	}
-	INTON;
-}
-
-/*
- * Update the localeisutf8 flag.
- */
-void
-updatecharset(void)
-{
-	char *charset;
-
-	charset = nl_langinfo(CODESET);
-	localeisutf8 = !strcmp(charset, "UTF-8");
-}
-
-void
-initcharset(void)
-{
-	updatecharset();
-	initial_localeisutf8 = localeisutf8;
-}
-
-/*
- * Generate a list of exported variables.  This routine is used to construct
- * the third argument to execve when executing a program.
- */
-
-char **
-environment(void)
-{
-	int nenv;
-	struct var **vpp;
-	struct var *vp;
-	char **env, **ep;
-
-	nenv = 0;
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next)
-			if (vp->flags & VEXPORT)
-				nenv++;
-	}
-	ep = env = stalloc((nenv + 1) * sizeof *env);
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next)
-			if (vp->flags & VEXPORT)
-				*ep++ = vp->text;
-	}
-	*ep = NULL;
-	return env;
-}
-
-
-static int
-var_compare(const void *a, const void *b)
-{
-	const char *const *sa, *const *sb;
-
-	sa = a;
-	sb = b;
-	/*
-	 * This compares two var=value strings which creates a different
-	 * order from what you would probably expect.  POSIX is somewhat
-	 * ambiguous on what should be sorted exactly.
-	 */
-	return strcoll(*sa, *sb);
-}
-
-
-/*
- * Command to list all variables which are set.  This is invoked from the
- * set command when it is called without any options or operands.
- */
-
-int
-showvarscmd(int argc __unused, char **argv __unused)
-{
-	struct var **vpp;
-	struct var *vp;
-	const char *s;
-	const char **vars;
-	int i, n;
-
-	/*
-	 * POSIX requires us to sort the variables.
-	 */
-	n = 0;
-	for (vpp = vartab; vpp < vartab + VTABSIZE; vpp++) {
-		for (vp = *vpp; vp; vp = vp->next) {
-			if (!(vp->flags & VUNSET))
-				n++;
-		}
-	}
-
-	INTOFF;
-	vars = ckmalloc(n * sizeof(*vars));
-	i = 0;
-	for (vpp = vartab; vpp < vartab + VTABSIZE; vpp++) {
-		for (vp = *vpp; vp; vp = vp->next) {
-			if (!(vp->flags & VUNSET))
-				vars[i++] = vp->text;
-		}
-	}
-
-	qsort(vars, n, sizeof(*vars), var_compare);
-	for (i = 0; i < n; i++) {
-		/*
-		 * Skip improper variable names so the output remains usable as
-		 * shell input.
-		 */
-		if (!isassignment(vars[i]))
-			continue;
-		s = strchr(vars[i], '=');
-		s++;
-		outbin(vars[i], s - vars[i], out1);
-		out1qstr(s);
-		out1c('\n');
-	}
-	ckfree(vars);
-	INTON;
-
-	return 0;
-}
-
-
-
-/*
- * The export and readonly commands.
- */
-
-int
-exportcmd(int argc __unused, char **argv)
-{
-	struct var **vpp;
-	struct var *vp;
-	char **ap;
-	char *name;
-	char *p;
-	char *cmdname;
-	int ch, values;
-	int flag = argv[0][0] == 'r'? VREADONLY : VEXPORT;
-
-	cmdname = argv[0];
-	values = 0;
-	while ((ch = nextopt("p")) != '\0') {
-		switch (ch) {
-		case 'p':
-			values = 1;
-			break;
-		}
-	}
-
-	if (values && *argptr != NULL)
-		error("-p requires no arguments");
-	if (*argptr != NULL) {
-		for (ap = argptr; (name = *ap) != NULL; ap++) {
-			if ((p = strchr(name, '=')) != NULL) {
-				p++;
-			} else {
-				vp = find_var(name, NULL, NULL);
-				if (vp != NULL) {
-					vp->flags |= flag;
-					if ((vp->flags & VEXPORT) && localevar(vp->text)) {
-						change_env(vp->text, 1);
-						(void) setlocale(LC_ALL, "");
-						updatecharset();
-					}
-					continue;
-				}
-			}
-			setvar(name, p, flag);
-		}
-	} else {
-		for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-			for (vp = *vpp ; vp ; vp = vp->next) {
-				if (vp->flags & flag) {
-					if (values) {
-						/*
-						 * Skip improper variable names
-						 * so the output remains usable
-						 * as shell input.
-						 */
-						if (!isassignment(vp->text))
-							continue;
-						out1str(cmdname);
-						out1c(' ');
-					}
-					if (values && !(vp->flags & VUNSET)) {
-						outbin(vp->text,
-						    vp->name_len + 1, out1);
-						out1qstr(vp->text +
-						    vp->name_len + 1);
-					} else
-						outbin(vp->text, vp->name_len,
-						    out1);
-					out1c('\n');
-				}
-			}
-		}
-	}
-	return 0;
-}
-
-
-/*
- * The "local" command.
- */
-
-int
-localcmd(int argc __unused, char **argv __unused)
-{
-	char *name;
-
-	nextopt("");
-	if (! in_function())
-		error("Not in a function");
-	while ((name = *argptr++) != NULL) {
-		mklocal(name);
-	}
-	return 0;
-}
-
-
-/*
- * Make a variable a local variable.  When a variable is made local, it's
- * value and flags are saved in a localvar structure.  The saved values
- * will be restored when the shell function returns.  We handle the name
- * "-" as a special case.
- */
-
-void
-mklocal(char *name)
-{
-	struct localvar *lvp;
-	struct var **vpp;
-	struct var *vp;
-
-	INTOFF;
-	lvp = ckmalloc(sizeof (struct localvar));
-	if (name[0] == '-' && name[1] == '\0') {
-		lvp->text = ckmalloc(sizeof optval);
-		memcpy(lvp->text, optval, sizeof optval);
-		vp = NULL;
-	} else {
-		vp = find_var(name, &vpp, NULL);
-		if (vp == NULL) {
-			if (strchr(name, '='))
-				setvareq(savestr(name), VSTRFIXED | VNOLOCAL);
-			else
-				setvar(name, NULL, VSTRFIXED | VNOLOCAL);
-			vp = *vpp;	/* the new variable */
-			lvp->text = NULL;
-			lvp->flags = VUNSET;
-		} else {
-			lvp->text = vp->text;
-			lvp->flags = vp->flags;
-			vp->flags |= VSTRFIXED|VTEXTFIXED;
-			if (name[vp->name_len] == '=')
-				setvareq(savestr(name), VNOLOCAL);
-		}
-	}
-	lvp->vp = vp;
-	lvp->next = localvars;
-	localvars = lvp;
-	INTON;
-}
-
-
-/*
- * Called after a function returns.
- */
-
-void
-poplocalvars(void)
-{
-	struct localvar *lvp;
-	struct var *vp;
-	int islocalevar;
-
-	INTOFF;
-	while ((lvp = localvars) != NULL) {
-		localvars = lvp->next;
-		vp = lvp->vp;
-		if (vp == NULL) {	/* $- saved */
-			memcpy(optval, lvp->text, sizeof optval);
-			ckfree(lvp->text);
-			optschanged();
-		} else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
-			vp->flags &= ~VREADONLY;
-			(void)unsetvar(vp->text);
-		} else {
-			islocalevar = (vp->flags | lvp->flags) & VEXPORT &&
-			    localevar(lvp->text);
-			if ((vp->flags & VTEXTFIXED) == 0)
-				ckfree(vp->text);
-			vp->flags = lvp->flags;
-			vp->text = lvp->text;
-			if (vp->func)
-				(*vp->func)(vp->text + vp->name_len + 1);
-			if (islocalevar) {
-				change_env(vp->text, vp->flags & VEXPORT &&
-				    (vp->flags & VUNSET) == 0);
-				setlocale(LC_ALL, "");
-				updatecharset();
-			}
-		}
-		ckfree(lvp);
-	}
-	INTON;
-}
-
-
-int
-setvarcmd(int argc, char **argv)
-{
-	if (argc <= 2)
-		return unsetcmd(argc, argv);
-	else if (argc == 3)
-		setvar(argv[1], argv[2], 0);
-	else
-		error("too many arguments");
-	return 0;
-}
-
-
-/*
- * The unset builtin command.
- */
-
-int
-unsetcmd(int argc __unused, char **argv __unused)
-{
-	char **ap;
-	int i;
-	int flg_func = 0;
-	int flg_var = 0;
-	int ret = 0;
-
-	while ((i = nextopt("vf")) != '\0') {
-		if (i == 'f')
-			flg_func = 1;
-		else
-			flg_var = 1;
-	}
-	if (flg_func == 0 && flg_var == 0)
-		flg_var = 1;
-
-	INTOFF;
-	for (ap = argptr; *ap ; ap++) {
-		if (flg_func)
-			ret |= unsetfunc(*ap);
-		if (flg_var)
-			ret |= unsetvar(*ap);
-	}
-	INTON;
-	return ret;
-}
-
-
-/*
- * Unset the specified variable.
- * Called with interrupts off.
- */
-
-int
-unsetvar(const char *s)
-{
-	struct var **vpp;
-	struct var *vp;
-
-	vp = find_var(s, &vpp, NULL);
-	if (vp == NULL)
-		return (0);
-	if (vp->flags & VREADONLY)
-		return (1);
-	if (vp->text[vp->name_len + 1] != '\0')
-		setvar(s, "", 0);
-	if ((vp->flags & VEXPORT) && localevar(vp->text)) {
-		change_env(s, 0);
-		setlocale(LC_ALL, "");
-		updatecharset();
-	}
-	vp->flags &= ~VEXPORT;
-	vp->flags |= VUNSET;
-	if ((vp->flags & VSTRFIXED) == 0) {
-		if ((vp->flags & VTEXTFIXED) == 0)
-			ckfree(vp->text);
-		*vpp = vp->next;
-		ckfree(vp);
-	}
-	return (0);
-}
-
-
-
-/*
- * Returns true if the two strings specify the same variable.  The first
- * variable name is terminated by '='; the second may be terminated by
- * either '=' or '\0'.
- */
-
-static int
-varequal(const char *p, const char *q)
-{
-	while (*p == *q++) {
-		if (*p++ == '=')
-			return 1;
-	}
-	if (*p == '=' && *(q - 1) == '\0')
-		return 1;
-	return 0;
-}
-
-/*
- * Search for a variable.
- * 'name' may be terminated by '=' or a NUL.
- * vppp is set to the pointer to vp, or the list head if vp isn't found
- * lenp is set to the number of characters in 'name'
- */
-
-static struct var *
-find_var(const char *name, struct var ***vppp, int *lenp)
-{
-	unsigned int hashval;
-	int len;
-	struct var *vp, **vpp;
-	const char *p = name;
-
-	hashval = 0;
-	while (*p && *p != '=')
-		hashval = 2 * hashval + (unsigned char)*p++;
-	len = p - name;
-
-	if (lenp)
-		*lenp = len;
-	vpp = &vartab[hashval % VTABSIZE];
-	if (vppp)
-		*vppp = vpp;
-
-	for (vp = *vpp ; vp ; vpp = &vp->next, vp = *vpp) {
-		if (vp->name_len != len)
-			continue;
-		if (memcmp(vp->text, name, len) != 0)
-			continue;
-		if (vppp)
-			*vppp = vpp;
-		return vp;
-	}
-	return NULL;
-}
diff --git a/bin/1sh/var.h b/bin/1sh/var.h
deleted file mode 100644
index 1e6420fd..00000000
--- a/bin/1sh/var.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)var.h	8.2 (Berkeley) 5/4/95
- * $FreeBSD: releng/12.0/bin/sh/var.h 326025 2017-11-20 19:49:47Z pfg $
- */
-
-/*
- * Shell variables.
- */
-
-/* flags */
-#define VEXPORT		0x01	/* variable is exported */
-#define VREADONLY	0x02	/* variable cannot be modified */
-#define VSTRFIXED	0x04	/* variable struct is statically allocated */
-#define VTEXTFIXED	0x08	/* text is statically allocated */
-#define VSTACK		0x10	/* text is allocated on the stack */
-#define VUNSET		0x20	/* the variable is not set */
-#define VNOFUNC		0x40	/* don't call the callback function */
-#define VNOSET		0x80	/* do not set variable - just readonly test */
-#define VNOLOCAL	0x100	/* ignore forcelocal */
-
-
-struct var {
-	struct var *next;		/* next entry in hash list */
-	int flags;			/* flags are defined above */
-	int name_len;			/* length of name */
-	char *text;			/* name=value */
-	void (*func)(const char *);
-					/* function to be called when  */
-					/* the variable gets set/unset */
-};
-
-
-struct localvar {
-	struct localvar *next;		/* next local variable in list */
-	struct var *vp;			/* the variable that was made local */
-	int flags;			/* saved flags */
-	char *text;			/* saved text */
-};
-
-
-extern struct localvar *localvars;
-extern int forcelocal;
-
-extern struct var vifs;
-extern struct var vmail;
-extern struct var vmpath;
-extern struct var vpath;
-extern struct var vps0;
-extern struct var vps1;
-extern struct var vps2;
-extern struct var vps4;
-extern struct var vrps1;
-extern struct var vrps2;
-extern struct var vdisvfork;
-#ifndef NO_HISTORY
-extern struct var vhistfile;
-extern struct var vhistsize;
-extern struct var vterm;
-#endif
-
-extern int localeisutf8;
-/* The parser uses the locale that was in effect at startup. */
-extern int initial_localeisutf8;
-
-/*
- * The following macros access the values of the above variables.
- * They have to skip over the name.  They return the null string
- * for unset variables.
- */
-
-#define ifsval()	(vifs.text + 4)
-#define ifsset()	((vifs.flags & VUNSET) == 0)
-#define mailval()	(vmail.text + 5)
-#define mpathval()	(vmpath.text + 9)
-#define pathval()	(vpath.text + 5)
-#define ps0val()	(vps0.text + 4)
-#define ps1val()	(vps1.text + 4)
-#define ps2val()	(vps2.text + 4)
-#define ps4val()	(vps4.text + 4)
-#define rps1val()	(vrps1.text + 5)
-#define rps2val()	(vrps2.text + 5)
-#define optindval()	(voptind.text + 7)
-#ifndef NO_HISTORY
-#define histfileval()	(vhistfile.text + 9)
-#define histsizeval()	(vhistsize.text + 9)
-#define termval()	(vterm.text + 5)
-#endif
-
-#define mpathset()	((vmpath.flags & VUNSET) == 0)
-#define disvforkset()	((vdisvfork.flags & VUNSET) == 0)
-
-void initvar(void);
-void setvar(const char *, const char *, int);
-void setvareq(char *, int);
-struct arglist;
-void listsetvar(struct arglist *, int);
-char *lookupvar(const char *);
-char *bltinlookup(const char *, int);
-void bltinsetlocale(void);
-void bltinunsetlocale(void);
-void updatecharset(void);
-void initcharset(void);
-char **environment(void);
-int showvarscmd(int, char **);
-void mklocal(char *);
-void poplocalvars(void);
-int unsetvar(const char *);
-int setvarsafe(const char *, const char *, int);