diff options
Diffstat (limited to '')
-rw-r--r-- | src/bltin/bltin.h | 98 | ||||
-rw-r--r-- | src/bltin/echo.1 | 113 | ||||
-rw-r--r-- | src/bltin/printf.1 | 358 | ||||
-rw-r--r-- | src/bltin/printf.c | 547 | ||||
-rw-r--r-- | src/bltin/test.1 | 313 | ||||
-rw-r--r-- | src/bltin/test.c | 545 | ||||
-rw-r--r-- | src/bltin/times.c | 32 |
7 files changed, 2006 insertions, 0 deletions
diff --git a/src/bltin/bltin.h b/src/bltin/bltin.h new file mode 100644 index 0000000..03aace5 --- /dev/null +++ b/src/bltin/bltin.h @@ -0,0 +1,98 @@ +/* $NetBSD: bltin.h,v 1.10 2002/11/24 22:35:43 christos Exp $ */ + +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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 8.1 (Berkeley) 5/31/93 + */ + +/* + * 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" +#include "../options.h" +#ifdef SHELL +#include "../memalloc.h" +#include "../output.h" +#include "../error.h" +#ifndef USE_GLIBC_STDIO +#undef stdout +#undef stderr +#undef putc +#undef putchar +#undef fileno +#define stdout out1 +#define stderr out2 +#define printf out1fmt +#define putc(c, file) outc(c, file) +#define putchar(c) out1c(c) +#define FILE struct output +#define fprintf outfmt +#define fputs outstr +#define fflush flushout +#define fileno(f) ((f)->fd) +#define ferror outerr +#endif +#define INITARGS(argv) +#define err sh_err +#define verr sh_verr +#define errx sh_errx +#define verrx sh_verrx +#define warn sh_warn +#define vwarn sh_vwarn +#define warnx sh_warnx +#define vwarnx sh_vwarnx +#define exit sh_exit +#define setprogname(s) +#define getprogname() commandname +#define setlocate(l,s) 0 + +#define getenv(p) bltinlookup((p),0) + +#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 + +int echocmd(int, char **); + + +extern const char *commandname; diff --git a/src/bltin/echo.1 b/src/bltin/echo.1 new file mode 100644 index 0000000..ffed9dc --- /dev/null +++ b/src/bltin/echo.1 @@ -0,0 +1,113 @@ +.\" $NetBSD: echo.1,v 1.12 2002/02/08 01:22:00 ross Exp $ +.\" +.\" 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. +.\" Copyright 1989 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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.1 8.1 (Berkeley) 5/31/93 +.\" +.Dd May 31, 1993 +.Dt ECHO 1 +.Os +.Sh NAME +.Nm echo +.Nd produce message in a shell script +.Sh SYNOPSIS +.Nm +.Op Fl n | Fl e +.Ar args ... +.Sh DESCRIPTION +.Nm +prints its arguments on the standard output, separated by spaces. +Unless the +.Fl n +option is present, a newline is output following the arguments. +The +.Fl e +option causes +.Nm +to treat the escape sequences specially, as described in the following +paragraph. +The +.Fl e +option is the default, and is provided solely for compatibility with +other systems. +Only one of the options +.Fl n +and +.Fl e +may be given. +.Pp +If any of the following sequences of characters is encountered during +output, the sequence is not output. Instead, the specified action is +performed: +.Bl -tag -width indent +.It Li \eb +A backspace character is output. +.It Li \ec +Subsequent output is suppressed. This is normally used at the end of the +last argument to suppress the trailing newline that +.Nm +would otherwise output. +.It Li \ef +Output a form feed. +.It Li \en +Output a newline character. +.It Li \er +Output a carriage return. +.It Li \et +Output a (horizontal) tab character. +.It Li \ev +Output a vertical tab. +.It Li \e0 Ns Ar digits +Output the character whose value is given by zero to three digits. +If there are zero digits, a nul character is output. +.It Li \e\e +Output a backslash. +.El +.Sh HINTS +Remember that backslash is special to the shell and needs to be escaped. +To output a message to standard error, say +.Pp +.D1 echo message \*[Gt]\*[Am]2 +.Sh BUGS +The octal character escape mechanism +.Pq Li \e0 Ns Ar digits +differs from the +C language mechanism. +.Pp +There is no way to force +.Nm +to treat its arguments literally, rather than interpreting them as +options and escape sequences. diff --git a/src/bltin/printf.1 b/src/bltin/printf.1 new file mode 100644 index 0000000..2f1d625 --- /dev/null +++ b/src/bltin/printf.1 @@ -0,0 +1,358 @@ +.\" $NetBSD: printf.1,v 1.17 2002/11/24 22:35:45 christos Exp $ +.\" +.\" 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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: @(#)printf.1 8.1 (Berkeley) 6/6/93 +.\" +.Dd November 5, 1993 +.Dt PRINTF 1 +.Os +.Sh NAME +.Nm printf +.Nd formatted output +.Sh SYNOPSIS +.Nm +.Ar format +.Op Ar arguments ... +.Sh DESCRIPTION +.Nm +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 b , +.Cm B , +.Cm c +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 +.Tn ASCII +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 +.St -ansiC . +The characters and their meanings are as follows: +.Bl -tag -width Ds -offset indent +.It Cm \ee +Write an \*[Lt]escape\*[Gt] character. +.It Cm \ea +Write a \*[Lt]bell\*[Gt] character. +.It Cm \eb +Write a \*[Lt]backspace\*[Gt] character. +.It Cm \ef +Write a \*[Lt]form-feed\*[Gt] character. +.It Cm \en +Write a \*[Lt]new-line\*[Gt] character. +.It Cm \er +Write a \*[Lt]carriage return\*[Gt] character. +.It Cm \et +Write a \*[Lt]tab\*[Gt] character. +.It Cm \ev +Write a \*[Lt]vertical tab\*[Gt] character. +.It Cm \e\' +Write a \*[Lt]single quote\*[Gt] character. +.It Cm \e" +Write a \*[Lt]double quote\*[Gt] character. +.It Cm \e\e +Write a backslash character. +.It Cm \e Ns Ar num +Write an 8\-bit character whose +.Tn ASCII +value is the 1\-, 2\-, or 3\-digit octal number +.Ar num . +.It Cm \ex Ns Ar xx +Write an 8\-bit character whose +.Tn ASCII +value is the 1\- or 2\-digit hexadecimal number +.Ar xx . +.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 ``alternative form''. +For +.Cm b , +.Cm c , +.Cm d , +and +.Cm s +formats, this option has no effect. +For the +.Cm o +format 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 e , +.Cm E , +.Cm f , +.Cm 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. +.\" I turned this off - decided it isn't a valid use of '#' +.\" For the +.\" .Cm B +.\" format, backslash-escape sequences are expanded first; +.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 characters 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 characters to be printed +from a string +.Sm off +.Pf ( Cm b No , +.Sm on +.Cm B +and +.Cm s +formats); 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 diouxXfwEgGbBcs ) . +.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 f +The +.Ar argument +is printed in the style +.Sm off +.Pf [\-]ddd Cm \&. No ddd +.Sm on +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. +.It Cm eE +The +.Ar argument +is printed in the style +.Sm off +.Pf [\-]d Cm \&. No ddd Cm e No \\*(Pmdd +.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. +An upper-case E is used for an `E' format. +.It Cm gG +The +.Ar argument +is printed in style +.Cm f +or in style +.Cm e +.Pq Cm E +whichever gives full precision in minimum space. +.It Cm b +Characters from the string +.Ar argument +are printed with backslash-escape sequences expanded. +.br +The following additional backslash-escape sequences are supported: +.Bl -tag -width Ds +.It Cm \ec +Causes +.Nm +to ignore any remaining characters in the string operand containing it, +any remaining string operands, and any additional characters in +the format operand. +.It Cm \e0 Ns Ar num +Write an 8\-bit character whose +.Tn ASCII +value is the 1\-, 2\-, or 3\-digit +octal number +.Ar num . +.It Cm \e^ Ns Ar c +Write the control character +.Ar c . +Generates characters `\e000' through `\e037`, and `\e177' (from `\e^?'). +.It Cm \eM\- Ns Ar c +Write the character +.Ar c +with the 8th bit set. +Generates characters `\e241' through `\e376`. +.It Cm \eM^ Ns Ar c +Write the control character +.Ar c +with the 8th bit set. +Generates characters `\e000' through `\e037`, and `\e177' (from `\eM^?'). +.El +.It Cm B +Characters from the string +.Ar argument +are printed with unprintable characters backslash-escaped using the +.Sm off +.Pf ` Cm \e Ar c No ', +.Pf ` Cm \e^ Ar c No ', +.Pf ` Cm \eM\- Ar c No ' +or +.Pf ` Cm \eM^ Ar c No ', +.Sm on +formats described above. +.It Cm c +The first character of +.Ar argument +is printed. +.It Cm s +Characters from the string +.Ar argument +are printed until the end is reached or until the number of characters +indicated by the precision specification is reached; if the +precision is omitted, all characters in the string are printed. +.It Cm \&% +Print a `%'; no argument is used. +.El +.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. +.Sh EXIT STATUS +.Nm +exits 0 on success, 1 on failure. +.Sh SEE ALSO +.Xr echo 1 , +.Xr printf 3 , +.Xr printf 9 +.Xr vis 3 +.Sh STANDARDS +The +.Nm +utility conforms to +.St -p1003.1-2001 . +.Pp +Support for the floating point formats and `*' as a field width and precision +are optional in POSIX. +.Pp +The behaviour of the %B format and the \e', \e", \exxx, \ee and +\e[M][\-|^]c escape sequences are undefined in POSIX. +.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. +.Pp +Hexadecimal character constants are restricted to, and should be specified +as, two character constants. This is contrary to the ISO C standard but +does guarantee detection of the end of the constant. diff --git a/src/bltin/printf.c b/src/bltin/printf.c new file mode 100644 index 0000000..2cfe8b3 --- /dev/null +++ b/src/bltin/printf.c @@ -0,0 +1,547 @@ +/* $NetBSD: printf.c,v 1.25 2002/11/24 22:35:45 christos Exp $ */ + +/* + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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> +#ifndef lint +#if !defined(BUILTIN) && !defined(SHELL) +__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"); +#endif +#endif + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)printf.c 8.2 (Berkeley) 3/22/95"; +#else +__RCSID("$NetBSD: printf.c,v 1.25 2002/11/24 22:35:45 christos Exp $"); +#endif +#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 <stdarg.h> +#ifndef SHELL +#include <stdio.h> +#endif +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +static char *conv_escape_str(char *); +static char *conv_escape(char *, int *); +static int getchr(void); +static double getdouble(void); +static intmax_t getintmax(void); +static uintmax_t getuintmax(void); +static char *getstr(void); +static char *mklong(const char *, const char *); +static void check_conversion(const char *, const char *); + +static int rval; +static char **gargv; + +#ifdef BUILTIN /* csh builtin */ +#define main progprintf +#endif + +#define isodigit(c) ((c) >= '0' && (c) <= '7') +#define octtobin(c) ((c) - '0') + +#ifdef SHELL /* sh (aka ash) builtin */ +#define main printfcmd +#include "bltin.h" +#else +#define nullstr "" +#endif /* SHELL */ +#include "system.h" + +#define PF(f, func) { \ + switch ((char *)param - (char *)array) { \ + default: \ + (void)printf(f, array[0], array[1], func); \ + break; \ + case sizeof(*param): \ + (void)printf(f, array[0], func); \ + break; \ + case 0: \ + (void)printf(f, func); \ + break; \ + } \ +} + +int main(int, char **); +int main(int argc, char *argv[]) +{ + char *fmt; + char *format; + int ch; + + rval = 0; + +#if !defined(SHELL) && !defined(BUILTIN) + (void)setlocale (LC_ALL, ""); +#endif + +#ifdef SHELL + nextopt(nullstr); +#endif + + argv = argptr; + format = *argv; + + if (!format) { + warnx("usage: printf format [arg ...]"); + goto err; + } + + gargv = ++argv; + +#define SKIP1 "#-+ 0" +#define SKIP2 "*0123456789" + do { + /* + * 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. + */ + + /* find next format specification */ + for (fmt = format; (ch = *fmt++) ;) { + char *start; + char nextch; + int array[2]; + int *param; + + if (ch == '\\') { + int c_ch; + fmt = conv_escape(fmt, &c_ch); + ch = c_ch; + goto pc; + } + if (ch != '%' || (*fmt == '%' && (++fmt || 1))) { +pc: + putchar(ch); + continue; + } + + /* Ok - we've found a format specification, + Save its address for a later printf(). */ + start = fmt - 1; + param = array; + + /* skip to field width */ + fmt += strspn(fmt, SKIP1); + if (*fmt == '*') + *param++ = getintmax(); + + /* skip to possible '.', get following precision */ + fmt += strspn(fmt, SKIP2); + if (*fmt == '.') + ++fmt; + if (*fmt == '*') + *param++ = getintmax(); + + fmt += strspn(fmt, SKIP2); + + ch = *fmt; + if (!ch) { + warnx("missing format character"); + goto err; + } + /* null terminate format string to we can use it + as an argument to printf. */ + nextch = fmt[1]; + fmt[1] = 0; + switch (ch) { + + case 'b': { + char *p = conv_escape_str(getstr()); + *fmt = 's'; + PF(start, p); + /* escape if a \c was encountered */ + if (rval & 0x100) + goto out; + *fmt = 'b'; + break; + } + case 'c': { + int p = getchr(); + PF(start, p); + break; + } + case 's': { + char *p = getstr(); + PF(start, p); + break; + } + case 'd': + case 'i': { + intmax_t p = getintmax(); + char *f = mklong(start, fmt); + PF(f, p); + break; + } + case 'o': + case 'u': + case 'x': + case 'X': { + uintmax_t p = getuintmax(); + char *f = mklong(start, fmt); + PF(f, p); + break; + } + case 'e': + case 'E': + case 'f': + case 'g': + case 'G': { + double p = getdouble(); + PF(start, p); + break; + } + default: + warnx("%s: invalid directive", start); + goto err; + } + *++fmt = nextch; + } + } while (gargv != argv && *gargv); + +out: +#ifdef SHELL + return (rval & ~0x100); +#else + fflush(stdout); + return (rval & ~0x100 ?: ferror(stdout)); +#endif +err: + return 1; +} + + +/* + * Print SysV echo(1) style escape string + * Halts processing string if a \c escape is encountered. + */ +static char * +conv_escape_str(char *str) +{ + int ch; +#ifndef SHELL + static char *conv_str; +#endif + char *cp; + + /* convert string into a temporary buffer... */ +#ifdef SHELL + STARTSTACKSTR(cp); +#else + if (conv_str) + free(conv_str); + conv_str = malloc(strlen(str) + 4); + if (!conv_str) + return "<no memory>"; + cp = conv_str; +#endif + + do { + int c; + + ch = *str++; + if (ch != '\\') + continue; + + ch = *str++; + if (ch == 'c') { + /* \c as in SYSV echo - abort all processing.... */ + rval |= 0x100; + ch = 0; + continue; + } + + /* + * %b string octal constants are not like those in C. + * They start with a \0, and are followed by 0, 1, 2, + * or 3 octal digits. + */ + if (ch == '0') { + unsigned char i; + i = 3; + ch = 0; + do { + unsigned k = octtobin(*str); + if (k > 7) + break; + str++; + ch <<= 3; + ch += k; + } while (--i); + continue; + } + + /* Finally test for sequences valid in the format string */ + str = conv_escape(str - 1, &c); + ch = c; +#ifdef SHELL + } while (STPUTC(ch, cp), ch); + + return stackblock(); +#else + } while ((*cp++ = ch)); + + return conv_str; +#endif +} + +/* + * Print "standard" escape characters + */ +static char * +conv_escape(char *str, int *conv_ch) +{ + int value; + int ch; + + ch = *str; + + switch (ch) { + default: + case 0: + value = '\\'; + goto out; + + case '0': case '1': case '2': case '3': + case '4': case '5': case '6': case '7': + ch = 3; + value = 0; + do { + value <<= 3; + value += octtobin(*str++); + } while (isodigit(*str) && --ch); + goto out; + + case '\\': value = '\\'; break; /* backslash */ + case 'a': value = '\a'; break; /* alert */ + case 'b': value = '\b'; break; /* backspace */ + case 'f': value = '\f'; break; /* form-feed */ + case 'n': value = '\n'; break; /* newline */ + case 'r': value = '\r'; break; /* carriage-return */ + case 't': value = '\t'; break; /* tab */ + case 'v': value = '\v'; break; /* vertical-tab */ + } + + str++; +out: + *conv_ch = value; + return str; +} + +static char * +mklong(const char *str, const char *ch) +{ +#ifdef SHELL + char *copy; +#else + static char copy[64]; +#endif + size_t len; + + len = ch - str + 3; +#ifdef SHELL + STARTSTACKSTR(copy); + copy = makestrspace(len, copy); +#else + if (len > sizeof copy) { + warnx("format %s too complex\n", str); + len = 4; + } +#endif + memcpy(copy, str, len - 3); + copy[len - 3] = 'j'; + copy[len - 2] = *ch; + copy[len - 1] = '\0'; + return (copy); +} + +static int +getchr(void) +{ + int val = 0; + + if (*gargv) + val = **gargv++; + return val; +} + +static char * +getstr(void) +{ + char *val = nullstr; + + if (*gargv) + val = *gargv++; + return val; +} + +static intmax_t +getintmax(void) +{ + intmax_t val = 0; + char *cp, *ep; + + cp = *gargv; + if (cp == NULL) + goto out; + gargv++; + + val = (unsigned char) cp[1]; + if (*cp == '\"' || *cp == '\'') + goto out; + + errno = 0; + val = strtoimax(cp, &ep, 0); + check_conversion(cp, ep); +out: + return val; +} + +static uintmax_t +getuintmax(void) +{ + uintmax_t val = 0; + char *cp, *ep; + + cp = *gargv; + if (cp == NULL) + goto out; + gargv++; + + val = (unsigned char) cp[1]; + if (*cp == '\"' || *cp == '\'') + goto out; + + errno = 0; + val = strtoumax(cp, &ep, 0); + check_conversion(cp, ep); +out: + return val; +} + +static double +getdouble(void) +{ + double val; + char *cp, *ep; + + cp = *gargv; + if (cp == NULL) + return 0; + gargv++; + + if (*cp == '\"' || *cp == '\'') + return (unsigned char) cp[1]; + + errno = 0; + val = strtod(cp, &ep); + check_conversion(cp, ep); + return val; +} + +static void +check_conversion(const char *s, const char *ep) +{ + if (*ep) { + if (ep == s) + warnx("%s: expected numeric value", s); + else + warnx("%s: not completely converted", s); + rval = 1; + } else if (errno == ERANGE) { + warnx("%s: %s", s, strerror(ERANGE)); + rval = 1; + } +} + +#ifdef SHELL +int +echocmd(int argc, char **argv) +{ + int nonl = 0; + struct output *outs = out1; + + if (!*++argv) + goto end; + if (equal(*argv, "-n")) { + nonl = ~nonl; + if (!*++argv) + goto end; + } + + do { + char c; + + c = *(*argv)++; + if (!c) + goto next; + if (c != '\\') + goto print; + + outstr(conv_escape_str(*argv - 1), outs); + if (rval & 0x100) + break; +next: + c = ' '; + if (!*++argv) { +end: + if (nonl) { + break; + } + c = '\n'; + } +print: + outc(c, outs); + } while (*argv); + return 0; +} +#endif diff --git a/src/bltin/test.1 b/src/bltin/test.1 new file mode 100644 index 0000000..750c85e --- /dev/null +++ b/src/bltin/test.1 @@ -0,0 +1,313 @@ +.\" $NetBSD: test.1,v 1.18 2002/09/25 15:18:44 wiz Exp $ +.\" +.\" 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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 +.\" +.Dd May 31, 1993 +.Dt TEST 1 +.Os +.Sh NAME +.Nm test , +.Nm \&[ +.Nd condition evaluation utility +.Sh SYNOPSIS +.Nm test +.Ar expression +.Nm \&[ +.Ar expression Cm ] +.Sh DESCRIPTION +The +.Nm test +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, test also +returns 1 (false). +.Pp +All operators and flags are separate arguments to the +.Nm test +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. +.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 +.Po Tn FIFO Pc . +.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. +This operator is retained for compatibility with previous versions of +this program. +Do not rely on its existence; use +.Fl h +instead. +.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 \&s\&1 Cm \&= Ar \&s\&2 +True if the strings +.Ar \&s\&1 +and +.Ar \&s\&2 +are identical. +.It Ar \&s\&1 Cm \&!= Ar \&s\&2 +True if the strings +.Ar \&s\&1 +and +.Ar \&s\&2 +are not identical. +.It Ar \&s\&1 Cm \&\*[Lt] Ar \&s\&2 +True if string +.Ar \&s\&1 +comes before +.Ar \&s\&2 +based on the ASCII value of their characters. +.It Ar \&s\&1 Cm \&\*[Gt] Ar \&s\&2 +True if string +.Ar \&s\&1 +comes after +.Ar \&s\&2 +based on the ASCII value of their characters. +.It Ar \&n\&1 Fl \&eq Ar \&n\&2 +True if the integers +.Ar \&n\&1 +and +.Ar \&n\&2 +are algebraically +equal. +.It Ar \&n\&1 Fl \&ne Ar \&n\&2 +True if the integers +.Ar \&n\&1 +and +.Ar \&n\&2 +are not +algebraically equal. +.It Ar \&n\&1 Fl \> Ar \&n\&2 +True if the integer +.Ar \&n\&1 +is algebraically +greater than the integer +.Ar \&n\&2 . +.It Ar \&n\&1 Fl \&ge Ar \&n\&2 +True if the integer +.Ar \&n\&1 +is algebraically +greater than or equal to the integer +.Ar \&n\&2 . +.It Ar \&n\&1 Fl \< Ar \&n\&2 +True if the integer +.Ar \&n\&1 +is algebraically less +than the integer +.Ar \&n\&2 . +.It Ar \&n\&1 Fl \&le Ar \&n\&2 +True if the integer +.Ar \&n\&1 +is algebraically less +than or equal to the integer +.Ar \&n\&2 . +.El +.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 \&( Ns Ar expression Ns Cm \&) +True if expression is true. +.El +.Pp +The +.Fl a +operator has higher precedence than the +.Fl o +operator. +.Sh GRAMMAR AMBIGUITY +The +.Nm test +grammar is inherently ambiguous. +In order to assure a degree of consistency, the cases described in +.St -p1003.2 +section 4.62.4, +are evaluated consistently according to the rules specified in the +standards document. +All other cases are subject to the ambiguity in the command semantics. +.Sh EXIT STATUS +The +.Nm test +utility exits with one of the following values: +.Bl -tag -width Ds +.It 0 +expression evaluated to true. +.It 1 +expression evaluated to false or expression was +missing. +.It \*[Gt]1 +An error occurred. +.El +.Sh STANDARDS +The +.Nm test +utility implements a superset of the +.St -p1003.2 +specification. diff --git a/src/bltin/test.c b/src/bltin/test.c new file mode 100644 index 0000000..1bcba4e --- /dev/null +++ b/src/bltin/test.c @@ -0,0 +1,545 @@ +/* $NetBSD: test.c,v 1.25 2002/05/25 23:12:16 wiz 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. + */ + +#include <sys/cdefs.h> +#ifndef lint +__RCSID("$NetBSD: test.c,v 1.25 2002/05/25 23:12:16 wiz Exp $"); +#endif + +#include <sys/stat.h> +#include <sys/types.h> + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <stdarg.h> +#include "bltin.h" + +/* 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 { + EOI, + FILRD, + FILWR, + FILEX, + FILEXIST, + FILREG, + FILDIR, + FILCDEV, + FILBDEV, + FILFIFO, + FILSOCK, + FILSYM, + FILGZ, + FILTT, + FILSUID, + FILSGID, + FILSTCK, + FILNT, + FILOT, + FILEQ, + FILUID, + FILGID, + STREZ, + STRNZ, + STREQ, + STRNE, + STRLT, + STRGT, + INTEQ, + INTNE, + INTGE, + INTGT, + INTLE, + INTLT, + UNOT, + BAND, + BOR, + LPAREN, + RPAREN, + OPERAND +}; + +enum token_types { + UNOP, + BINOP, + BUNOP, + BBINOP, + PAREN +}; + +static struct t_op { + const char *op_text; + short op_num, op_type; +} const ops [] = { + {"-r", FILRD, UNOP}, + {"-w", FILWR, UNOP}, + {"-x", FILEX, UNOP}, + {"-e", FILEXIST,UNOP}, + {"-f", FILREG, UNOP}, + {"-d", FILDIR, UNOP}, + {"-c", FILCDEV,UNOP}, + {"-b", FILBDEV,UNOP}, + {"-p", FILFIFO,UNOP}, + {"-u", FILSUID,UNOP}, + {"-g", FILSGID,UNOP}, + {"-k", FILSTCK,UNOP}, + {"-s", FILGZ, UNOP}, + {"-t", FILTT, UNOP}, + {"-z", STREZ, UNOP}, + {"-n", STRNZ, UNOP}, + {"-h", FILSYM, UNOP}, /* for backwards compat */ + {"-O", FILUID, UNOP}, + {"-G", FILGID, UNOP}, + {"-L", FILSYM, UNOP}, + {"-S", FILSOCK,UNOP}, + {"=", STREQ, BINOP}, + {"!=", STRNE, BINOP}, + {"<", STRLT, BINOP}, + {">", STRGT, BINOP}, + {"-eq", INTEQ, BINOP}, + {"-ne", INTNE, BINOP}, + {"-ge", INTGE, BINOP}, + {"-gt", INTGT, BINOP}, + {"-le", INTLE, BINOP}, + {"-lt", INTLT, BINOP}, + {"-nt", FILNT, BINOP}, + {"-ot", FILOT, BINOP}, + {"-ef", FILEQ, BINOP}, + {"!", UNOT, BUNOP}, + {"-a", BAND, BBINOP}, + {"-o", BOR, BBINOP}, + {"(", LPAREN, PAREN}, + {")", RPAREN, PAREN}, + {0, 0, 0} +}; + +static char **t_wp; +static struct t_op const *t_wp_op; + +static void syntax(const char *, const char *); +static int oexpr(enum token); +static int aexpr(enum token); +static int nexpr(enum token); +static int primary(enum token); +static int binop(void); +static int filstat(char *, enum token); +static enum token t_lex(char *); +static int isoperand(void); +static int getn(const char *); +static int newerf(const char *, const char *); +static int olderf(const char *, const char *); +static int equalf(const char *, const char *); +static int test_eaccess(const char *, int); +static int bash_group_member(gid_t); + +#ifndef SHELL +static void error(const char *, ...) __attribute__((__noreturn__)); + +static void +error(const char *msg, ...) +{ + va_list ap; + + va_start(ap, msg); + verrx(2, msg, ap); + /*NOTREACHED*/ + va_end(ap); +} +#endif + +#ifdef SHELL +int testcmd(int, char **); + +int +testcmd(int argc, char **argv) +#else +int main(int, char *[]); + +int +main(int argc, char *argv[]) +#endif +{ + int res; + +#ifndef SHELL + setprogname(argv[0]); +#endif + if (strcmp(argv[0], "[") == 0) { + if (strcmp(argv[--argc], "]")) + error("missing ]"); + argv[argc] = NULL; + } + + if (argc < 2) + return 1; + + t_wp = &argv[1]; + res = !oexpr(t_lex(*t_wp)); + + if (*t_wp != NULL && *++t_wp != NULL) + 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(*++t_wp) == BOR) + return oexpr(t_lex(*++t_wp)) || res; + t_wp--; + return res; +} + +static int +aexpr(enum token n) +{ + int res; + + res = nexpr(n); + if (t_lex(*++t_wp) == BAND) + return aexpr(t_lex(*++t_wp)) && res; + t_wp--; + return res; +} + +static int +nexpr(enum token n) +{ + if (n == UNOT) + return !nexpr(t_lex(*++t_wp)); + return primary(n); +} + +static int +primary(enum token n) +{ + enum token nn; + int res; + + if (n == EOI) + return 0; /* missing expression */ + if (n == LPAREN) { + if ((nn = t_lex(*++t_wp)) == RPAREN) + return 0; /* missing expression */ + res = oexpr(nn); + if (t_lex(*++t_wp) != RPAREN) + syntax(NULL, "closing paren expected"); + return res; + } + if (t_wp_op && t_wp_op->op_type == UNOP) { + /* unary expression */ + if (*++t_wp == NULL) + syntax(t_wp_op->op_text, "argument expected"); + 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); + } + } + + if (t_lex(t_wp[1]), t_wp_op && t_wp_op->op_type == BINOP) { + return binop(); + } + + return strlen(*t_wp) > 0; +} + +static int +binop(void) +{ + const char *opnd1, *opnd2; + struct t_op const *op; + + opnd1 = *t_wp; + (void) t_lex(*++t_wp); + op = t_wp_op; + + if ((opnd2 = *++t_wp) == (char *)0) + syntax(op->op_text, "argument expected"); + + switch (op->op_num) { + 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 getn(opnd1) == getn(opnd2); + case INTNE: + return getn(opnd1) != getn(opnd2); + case INTGE: + return getn(opnd1) >= getn(opnd2); + case INTGT: + return getn(opnd1) > getn(opnd2); + case INTLE: + return getn(opnd1) <= getn(opnd2); + case INTLT: + return getn(opnd1) < getn(opnd2); + 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 stat64 s; + + if (mode == FILSYM ? lstat64(nm, &s) : stat64(nm, &s)) + return 0; + + switch (mode) { + case FILRD: + return test_eaccess(nm, R_OK) == 0; + case FILWR: + return test_eaccess(nm, W_OK) == 0; + case FILEX: + return test_eaccess(nm, X_OK) == 0; + case FILEXIST: + return 1; + 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 enum token +t_lex(char *s) +{ + struct t_op const *op; + + op = ops; + + if (s == 0) { + t_wp_op = (struct t_op *)0; + return EOI; + } + while (op->op_text) { + if (strcmp(s, op->op_text) == 0) { + if ((op->op_type == UNOP && isoperand()) || + (op->op_num == LPAREN && *(t_wp+1) == 0)) + break; + t_wp_op = op; + return op->op_num; + } + op++; + } + t_wp_op = (struct t_op *)0; + return OPERAND; +} + +static int +isoperand(void) +{ + struct t_op const *op; + char *s, *t; + + op = ops; + if ((s = *(t_wp+1)) == 0) + return 1; + if ((t = *(t_wp+2)) == 0) + return 0; + while (op->op_text) { + if (strcmp(s, op->op_text) == 0) + return op->op_type == BINOP && + (t[0] != ')' || t[1] != '\0'); + op++; + } + return 0; +} + +/* atoi with error detection */ +static int +getn(const char *s) +{ + char *p; + long r; + + errno = 0; + r = strtol(s, &p, 10); + + if (errno != 0) + error("%s: out of range", s); + + while (isspace((unsigned char)*p)) + p++; + + if (*p) + error("%s: bad number", s); + + return (int) r; +} + +static int +newerf (const char *f1, const char *f2) +{ + struct stat b1, b2; + + return (stat (f1, &b1) == 0 && + stat (f2, &b2) == 0 && + b1.st_mtime > b2.st_mtime); +} + +static int +olderf (const char *f1, const char *f2) +{ + struct stat b1, b2; + + return (stat (f1, &b1) == 0 && + stat (f2, &b2) == 0 && + b1.st_mtime < b2.st_mtime); +} + +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); +} + +/* Do the same thing access(2) does, but use the effective uid and gid, + and don't make the mistake of telling root that any file is + executable. */ +static int +test_eaccess(const char *path, int mode) +{ + struct stat64 st; + int euid = geteuid(); + + if (stat64(path, &st) < 0) + return (-1); + + if (euid == 0) { + /* Root can read or write any file. */ + if (mode != X_OK) + return (0); + + /* Root can execute any file that has any one of the execute + bits set. */ + if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) + return (0); + } + + if (st.st_uid == euid) /* owner */ + mode <<= 6; + else if (bash_group_member(st.st_gid)) + mode <<= 3; + + if (st.st_mode & mode) + return (0); + + return (-1); +} + +/* Return non-zero if GID is one that we have in our groups list. */ +static int +bash_group_member(gid_t gid) +{ + register int i; + gid_t *group_array; + int ngroups; + + /* Short-circuit if possible, maybe saving a call to getgroups(). */ + if (gid == getgid() || gid == getegid()) + return (1); + + ngroups = getgroups(0, NULL); +#ifdef SHELL + group_array = stalloc(ngroups * sizeof(gid_t)); +#else + group_array = alloca(ngroups * sizeof(gid_t)); +#endif + getgroups(ngroups, group_array); + + /* Search through the list looking for GID. */ + for (i = 0; i < ngroups; i++) + if (gid == group_array[i]) + return (1); + + return (0); +} diff --git a/src/bltin/times.c b/src/bltin/times.c new file mode 100644 index 0000000..d8a35dc --- /dev/null +++ b/src/bltin/times.c @@ -0,0 +1,32 @@ +/* + * Copyright (c) 1999 Herbert Xu <herbert@debian.org> + * This file contains code for the times builtin. + * $Id$ + */ + +#include <sys/times.h> +#include <unistd.h> +#ifdef USE_GLIBC_STDIO +#include <stdio.h> +#else +#include "bltin.h" +#endif + +#define main timescmd + +int main() { + struct tms buf; + long int clk_tck = sysconf(_SC_CLK_TCK); + + times(&buf); + printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n", + (int) (buf.tms_utime / clk_tck / 60), + ((double) buf.tms_utime) / clk_tck, + (int) (buf.tms_stime / clk_tck / 60), + ((double) buf.tms_stime) / clk_tck, + (int) (buf.tms_cutime / clk_tck / 60), + ((double) buf.tms_cutime) / clk_tck, + (int) (buf.tms_cstime / clk_tck / 60), + ((double) buf.tms_cstime) / clk_tck); + return 0; +} |