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-.\" 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/12.1/usr.bin/printf/printf.1 350613 2019-08-05 20:19:38Z jilles $
-.\"
-.Dd July 29, 2019
-.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 \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
-and that an additional escape sequence
-.Cm \ec
-stops further output from this
-.Nm
-invocation.
-.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).