647 lines
14 KiB
C
647 lines
14 KiB
C
/* $NetBSD: options.c,v 1.57 2022/04/16 14:20:45 kre 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. 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 0
|
|
static char sccsid[] = "@(#)options.c 8.2 (Berkeley) 5/4/95";
|
|
#else
|
|
__RCSID("$NetBSD: options.c,v 1.57 2022/04/16 14:20:45 kre Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "shell.h"
|
|
#define DEFINE_OPTIONS
|
|
#include "options.h"
|
|
#undef DEFINE_OPTIONS
|
|
#include "builtins.h"
|
|
#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 "syntax.h"
|
|
#ifndef SMALL
|
|
#include "myhistedit.h"
|
|
#endif
|
|
#include "show.h"
|
|
|
|
char *arg0; /* value of $0 */
|
|
struct shparam shellparam; /* current positional parameters */
|
|
char **argptr; /* argument list for builtin commands */
|
|
char *optionarg; /* set by nextopt (like getopt) */
|
|
char *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 int getopts(char *, char *, char **, char ***, char **);
|
|
|
|
|
|
/*
|
|
* Process the shell command line arguments.
|
|
*/
|
|
|
|
void
|
|
procargs(int argc, char **argv)
|
|
{
|
|
size_t i;
|
|
int psx;
|
|
|
|
argptr = argv;
|
|
if (argc > 0)
|
|
argptr++;
|
|
|
|
psx = posix; /* save what we set it to earlier */
|
|
/*
|
|
* option values are mostly boolean 0:off 1:on
|
|
* we use 2 (just in this routine) to mean "unknown yet"
|
|
*/
|
|
for (i = 0; i < NOPTS; i++)
|
|
optlist[i].val = 2;
|
|
posix = psx; /* restore before processing -o ... */
|
|
|
|
options(1);
|
|
|
|
if (*argptr == NULL && minusc == NULL)
|
|
sflag = 1;
|
|
if (iflag == 2 && sflag == 1 && isatty(0) && isatty(2))
|
|
iflag = 1;
|
|
if (iflag == 1 && sflag == 2)
|
|
iflag = 2;
|
|
if (mflag == 2)
|
|
mflag = iflag;
|
|
#ifndef DO_SHAREDVFORK
|
|
if (usefork == 2)
|
|
usefork = 1;
|
|
#endif
|
|
#if DEBUG >= 2
|
|
if (debug == 2)
|
|
debug = 1;
|
|
#endif
|
|
/*
|
|
* Any options not dealt with as special cases just above,
|
|
* and which were not set on the command line, are set to
|
|
* their expected default values (mostly "off")
|
|
*
|
|
* then as each option is initialised, save its setting now
|
|
* as its "default" value for future use ("set -o default").
|
|
*/
|
|
for (i = 0; i < NOPTS; i++) {
|
|
if (optlist[i].val == 2)
|
|
optlist[i].val = optlist[i].dflt;
|
|
optlist[i].dflt = optlist[i].val;
|
|
}
|
|
|
|
arg0 = argv[0];
|
|
if (sflag == 0 && minusc == NULL) {
|
|
commandname = argv[0];
|
|
arg0 = *argptr++;
|
|
setinputfile(arg0, 0);
|
|
commandname = arg0;
|
|
}
|
|
/* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
|
|
if (minusc != NULL) {
|
|
if (argptr == NULL || *argptr == NULL)
|
|
error("Bad -c option");
|
|
minusc = *argptr++;
|
|
if (*argptr != 0)
|
|
arg0 = *argptr++;
|
|
}
|
|
|
|
shellparam.p = argptr;
|
|
shellparam.reset = 1;
|
|
/* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
|
|
while (*argptr) {
|
|
shellparam.nparam++;
|
|
argptr++;
|
|
}
|
|
optschanged();
|
|
}
|
|
|
|
|
|
void
|
|
optschanged(void)
|
|
{
|
|
setinteractive(iflag);
|
|
#ifndef SMALL
|
|
histedit();
|
|
#endif
|
|
setjobctl(mflag);
|
|
|
|
if (privileged && !pflag) {
|
|
setuid(getuid());
|
|
setgid(getgid());
|
|
privileged = 0;
|
|
setvarsafe("PSc", (getuid() == 0 ? "#" : "$"), 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Process shell options. The global variable argptr contains a pointer
|
|
* to the argument list; we advance it past the options.
|
|
*/
|
|
|
|
STATIC void
|
|
options(int cmdline)
|
|
{
|
|
static char empty[] = "";
|
|
char *p;
|
|
int val;
|
|
int c;
|
|
|
|
if (cmdline)
|
|
minusc = NULL;
|
|
while ((p = *argptr) != NULL) {
|
|
argptr++;
|
|
if ((c = *p++) == '-') {
|
|
val = 1;
|
|
if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
|
|
if (!cmdline) {
|
|
/* "-" means turn off -x and -v */
|
|
if (p[0] == '\0')
|
|
xflag = vflag = 0;
|
|
/* "--" means reset params */
|
|
else if (*argptr == NULL)
|
|
setparam(argptr);
|
|
}
|
|
break; /* "-" or "--" terminates options */
|
|
}
|
|
} else if (c == '+') {
|
|
val = 0;
|
|
} else {
|
|
argptr--;
|
|
break;
|
|
}
|
|
while ((c = *p++) != '\0') {
|
|
if (val == 1 && c == 'c' && cmdline) {
|
|
/* command is after shell args*/
|
|
minusc = empty;
|
|
} else if (c == 'o') {
|
|
if (*p != '\0')
|
|
minus_o(p, val + (cmdline ? val : 0));
|
|
else if (*argptr)
|
|
minus_o(*argptr++,
|
|
val + (cmdline ? val : 0));
|
|
else if (!cmdline)
|
|
minus_o(NULL, val);
|
|
else
|
|
error("arg for %co missing", "+-"[val]);
|
|
break;
|
|
#ifdef DEBUG
|
|
} else if (c == 'D') {
|
|
if (*p) {
|
|
set_debug(p, val);
|
|
break;
|
|
} else if (*argptr)
|
|
set_debug(*argptr++, val);
|
|
else
|
|
set_debug("*$", val);
|
|
#endif
|
|
} else {
|
|
setoption(c, val);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
set_opt_val(size_t i, int val)
|
|
{
|
|
size_t j;
|
|
int flag;
|
|
|
|
if (val && (flag = optlist[i].opt_set)) {
|
|
/* some options (eg vi/emacs) are mutually exclusive */
|
|
for (j = 0; j < NOPTS; j++)
|
|
if (optlist[j].opt_set == flag)
|
|
optlist[j].val = 0;
|
|
}
|
|
#ifndef SMALL
|
|
if (i == _SH_OPT_Xflag)
|
|
xtracefdsetup(val);
|
|
#endif
|
|
optlist[i].val = val;
|
|
#ifdef DEBUG
|
|
if (&optlist[i].val == &debug)
|
|
opentrace(); /* different "trace" than the -x one... */
|
|
#endif
|
|
}
|
|
|
|
STATIC void
|
|
minus_o(char *name, int val)
|
|
{
|
|
size_t i;
|
|
const char *sep = ": ";
|
|
|
|
if (name == NULL) {
|
|
if (val) {
|
|
out1str("Current option settings");
|
|
for (i = 0; i < NOPTS; i++) {
|
|
if (optlist[i].name == NULL) {
|
|
out1fmt("%s%c%c", sep,
|
|
"+-"[optlist[i].val],
|
|
optlist[i].letter);
|
|
sep = ", ";
|
|
}
|
|
}
|
|
out1c('\n');
|
|
for (i = 0; i < NOPTS; i++) {
|
|
if (optlist[i].name)
|
|
out1fmt("%-19s %s\n", optlist[i].name,
|
|
optlist[i].val ? "on" : "off");
|
|
}
|
|
} else {
|
|
out1str("set -o default");
|
|
for (i = 0; i < NOPTS; i++) {
|
|
if (optlist[i].val == optlist[i].dflt)
|
|
continue;
|
|
if (optlist[i].name)
|
|
out1fmt(" %co %s",
|
|
"+-"[optlist[i].val], optlist[i].name);
|
|
else
|
|
out1fmt(" %c%c", "+-"[optlist[i].val],
|
|
optlist[i].letter);
|
|
}
|
|
out1c('\n');
|
|
}
|
|
} else {
|
|
if (val == 1 && equal(name, "default")) { /* special case */
|
|
for (i = 0; i < NOPTS; i++)
|
|
set_opt_val(i, optlist[i].dflt);
|
|
return;
|
|
}
|
|
if (val)
|
|
val = 1;
|
|
for (i = 0; i < NOPTS; i++)
|
|
if (optlist[i].name && equal(name, optlist[i].name)) {
|
|
set_opt_val(i, val);
|
|
#ifndef SMALL
|
|
if (i == _SH_OPT_Xflag)
|
|
set_opt_val(_SH_OPT_xflag, val);
|
|
#endif
|
|
return;
|
|
}
|
|
error("Unknown option %co %s", "+-"[val], name);
|
|
}
|
|
}
|
|
|
|
|
|
STATIC void
|
|
setoption(int flag, int val)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = 0; i < NOPTS; i++)
|
|
if (optlist[i].letter == flag) {
|
|
set_opt_val(i, val);
|
|
#ifndef SMALL
|
|
if (i == _SH_OPT_Xflag)
|
|
set_opt_val(_SH_OPT_xflag, val);
|
|
#endif
|
|
return;
|
|
}
|
|
error("Unknown option %c%c", "+-"[val], flag);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
|
|
|
|
#ifdef mkinit
|
|
INCLUDE "options.h"
|
|
|
|
SHELLPROC {
|
|
int i;
|
|
|
|
for (i = 0; optlist[i].name; i++)
|
|
optlist[i].val = 0;
|
|
optschanged();
|
|
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Set the shell parameters.
|
|
*/
|
|
|
|
void
|
|
setparam(char **argv)
|
|
{
|
|
char **newparam;
|
|
char **ap;
|
|
int nparam;
|
|
|
|
for (nparam = 0 ; argv[nparam] ; nparam++)
|
|
continue;
|
|
ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
|
|
while (*argv) {
|
|
*ap++ = savestr(*argv++);
|
|
}
|
|
*ap = NULL;
|
|
freeparam(&shellparam);
|
|
shellparam.malloc = 1;
|
|
shellparam.nparam = nparam;
|
|
shellparam.p = newparam;
|
|
shellparam.optnext = NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Free the list of positional parameters.
|
|
*/
|
|
|
|
void
|
|
freeparam(volatile struct shparam *param)
|
|
{
|
|
char **ap;
|
|
|
|
if (param->malloc) {
|
|
for (ap = param->p ; *ap ; ap++)
|
|
ckfree(*ap);
|
|
ckfree(param->p);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* The shift builtin command.
|
|
*/
|
|
|
|
int
|
|
shiftcmd(int argc, char **argv)
|
|
{
|
|
int n;
|
|
char **ap1, **ap2;
|
|
|
|
if (argc > 2)
|
|
error("Usage: shift [n]");
|
|
n = 1;
|
|
if (argc > 1)
|
|
n = number(argv[1]);
|
|
if (n > shellparam.nparam)
|
|
error("can't shift that many");
|
|
INTOFF;
|
|
shellparam.nparam -= n;
|
|
for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
|
|
if (shellparam.malloc)
|
|
ckfree(*ap1);
|
|
}
|
|
ap2 = shellparam.p;
|
|
while ((*ap2++ = *ap1++) != NULL)
|
|
continue;
|
|
shellparam.optnext = NULL;
|
|
INTON;
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* The set command builtin.
|
|
*/
|
|
|
|
int
|
|
setcmd(int argc, char **argv)
|
|
{
|
|
if (argc == 1)
|
|
return showvars(0, 0, 1, 0);
|
|
INTOFF;
|
|
options(0);
|
|
optschanged();
|
|
if (*argptr != NULL) {
|
|
setparam(argptr);
|
|
}
|
|
INTON;
|
|
return 0;
|
|
}
|
|
|
|
|
|
void
|
|
getoptsreset(const char *value)
|
|
{
|
|
/*
|
|
* This is just to detect the case where OPTIND=1
|
|
* is executed. Any other string assigned to OPTIND
|
|
* is OK, but is not a reset. No errors, so cannot use number()
|
|
*/
|
|
if (is_digit(*value) && strtol(value, NULL, 10) == 1) {
|
|
shellparam.optnext = NULL;
|
|
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;
|
|
|
|
if (argc < 3)
|
|
error("usage: getopts optstring var [arg]");
|
|
else if (argc == 3)
|
|
optbase = shellparam.p;
|
|
else
|
|
optbase = &argv[3];
|
|
|
|
if (shellparam.reset == 1) {
|
|
shellparam.optnext = optbase;
|
|
shellparam.optptr = NULL;
|
|
shellparam.reset = 0;
|
|
}
|
|
|
|
return getopts(argv[1], argv[2], optbase, &shellparam.optnext,
|
|
&shellparam.optptr);
|
|
}
|
|
|
|
STATIC int
|
|
getopts(char *optstr, char *optvar, char **optfirst, char ***optnext, char **optpptr)
|
|
{
|
|
char *p, *q;
|
|
char c = '?';
|
|
int done = 0;
|
|
int ind = 0;
|
|
int err = 0;
|
|
char s[12];
|
|
|
|
if ((p = *optpptr) == 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';
|
|
err |= setvarsafe("OPTARG", s, 0);
|
|
} else {
|
|
outfmt(&errout, "Unknown option -%c\n", c);
|
|
(void) unsetvar("OPTARG", 0);
|
|
}
|
|
c = '?';
|
|
goto bad;
|
|
}
|
|
if (*++q == ':')
|
|
q++;
|
|
}
|
|
|
|
if (*++q == ':') {
|
|
if (*p == '\0' && (p = **optnext) == NULL) {
|
|
if (optstr[0] == ':') {
|
|
s[0] = c;
|
|
s[1] = '\0';
|
|
err |= setvarsafe("OPTARG", s, 0);
|
|
c = ':';
|
|
} else {
|
|
outfmt(&errout, "No arg for -%c option\n", c);
|
|
(void) unsetvar("OPTARG", 0);
|
|
c = '?';
|
|
}
|
|
goto bad;
|
|
}
|
|
|
|
if (p == **optnext)
|
|
(*optnext)++;
|
|
err |= setvarsafe("OPTARG", p, 0);
|
|
p = NULL;
|
|
} else
|
|
err |= setvarsafe("OPTARG", "", 0);
|
|
ind = *optnext - optfirst + 1;
|
|
goto out;
|
|
|
|
bad:
|
|
ind = 1;
|
|
*optnext = NULL;
|
|
p = NULL;
|
|
out:
|
|
*optpptr = p;
|
|
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;
|
|
*optpptr = NULL;
|
|
flushall();
|
|
exraise(EXERROR);
|
|
}
|
|
return done;
|
|
}
|
|
|
|
/*
|
|
* XXX - should get rid of. have all builtins use getopt(3). the
|
|
* library getopt must have the BSD extension static variable "optreset"
|
|
* otherwise it can't be used within the shell safely.
|
|
*
|
|
* 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 return the character, or '\0' on
|
|
* end of input. If optstring is NULL, then there are no options, and
|
|
* args are allowed to begin with '-', but a single leading "--" will be
|
|
* discarded. This is for some POSIX special builtins that require
|
|
* -- processing, have no args, and we never did opt processing before
|
|
* and need to retain backwards compat.
|
|
*/
|
|
|
|
int
|
|
nextopt(const char *optstring)
|
|
{
|
|
char *p;
|
|
const char *q;
|
|
char c;
|
|
|
|
if ((p = 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';
|
|
if (optstring == NULL) /* not processing the "option" */
|
|
argptr--; /* so make it be an arg again */
|
|
}
|
|
if (optstring == NULL)
|
|
return '\0';
|
|
c = *p++;
|
|
for (q = optstring ; *q != c ; ) {
|
|
if (*q == '\0')
|
|
error("Unknown option -%c", c);
|
|
if (*++q == ':')
|
|
q++;
|
|
}
|
|
if (*++q == ':') {
|
|
if (*p == '\0' && (p = *argptr++) == NULL)
|
|
error("No arg for -%c option", c);
|
|
optionarg = p;
|
|
p = NULL;
|
|
}
|
|
optptr = p;
|
|
return c;
|
|
}
|