/* $NetBSD: options.c,v 1.37 2004/10/30 19:29:27 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. 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 1.37 2004/10/30 19:29:27 christos 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 "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"
#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)
{
int i;
argptr = argv;
if (argc > 0)
argptr++;
for (i = 0; i < NOPTS; i++)
optlist[i].val = 2;
options(1);
if (*argptr == NULL && minusc == NULL)
sflag = 1;
if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
iflag = 1;
if (mflag == 2)
mflag = iflag;
for (i = 0; i < NOPTS; i++)
if (optlist[i].val == 2)
optlist[i].val = 0;
#if DEBUG == 2
debug = 1;
#endif
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);
#ifdef WITH_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.
*/
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 (c == 'c' && cmdline) {
/* command is after shell args*/
minusc = empty;
} else if (c == 'o') {
minus_o(*argptr, val);
if (*argptr)
argptr++;
} else {
setoption(c, val);
}
}
}
}
static void
set_opt_val(int i, int val)
{
int 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;
}
optlist[i].val = val;
#ifdef DEBUG
if (&optlist[i].val == &debug)
opentrace();
#endif
}
STATIC void
minus_o(char *name, int val)
{
int i;
if (name == NULL) {
out1str("Current option settings\n");
for (i = 0; i < NOPTS; i++)
out1fmt("%-16s%s\n", optlist[i].name,
optlist[i].val ? "on" : "off");
} else {
for (i = 0; i < NOPTS; i++)
if (equal(name, optlist[i].name)) {
set_opt_val(i, val);
return;
}
error("Illegal option -o %s", name);
}
}
STATIC void
setoption(int flag, int val)
{
int i;
for (i = 0; i < NOPTS; i++)
if (optlist[i].letter == flag) {
set_opt_val( i, val );
return;
}
error("Illegal option -%c", 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++);
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;
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);
shellparam.optnext = NULL;
INTON;
return 0;
}
/*
* The set command builtin.
*/
int
setcmd(int argc, char **argv)
{
if (argc == 1)
return showvars(0, 0, 1);
INTOFF;
options(0);
optschanged();
if (*argptr != NULL) {
setparam(argptr);
}
INTON;
return 0;
}
void
getoptsreset(value)
const char *value;
{
if (number(value) == 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, "Illegal 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.
*/
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';
}
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);
optionarg = p;
p = NULL;
}
optptr = p;
return c;
}