398 lines
8.7 KiB
C
Executable File
398 lines
8.7 KiB
C
Executable File
/*-
|
|
* Copyright (c) 1991 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)options.c 5.2 (Berkeley) 3/13/91";
|
|
#endif /* not lint */
|
|
|
|
#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"
|
|
|
|
char *arg0; /* value of $0 */
|
|
struct shparam shellparam; /* current positional parameters */
|
|
char **argptr; /* argument list for builtin commands */
|
|
char *optarg; /* set by nextopt (like getopt) */
|
|
char *optptr; /* used by nextopt */
|
|
int editable; /* isatty(0) && isatty(1) */
|
|
|
|
char *minusc; /* argument to -c option */
|
|
|
|
|
|
#ifdef __STDC__
|
|
STATIC void options(int);
|
|
STATIC void setoption(int, int);
|
|
#else
|
|
STATIC void options();
|
|
STATIC void setoption();
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
* Process the shell command line arguments.
|
|
*/
|
|
|
|
void
|
|
procargs(argc, argv)
|
|
char **argv;
|
|
{
|
|
char *p;
|
|
|
|
argptr = argv;
|
|
if (argc > 0)
|
|
argptr++;
|
|
for (p = optval ; p < optval + sizeof optval - 1 ; p++)
|
|
*p = 2;
|
|
options(1);
|
|
if (*argptr == NULL && minusc == NULL)
|
|
sflag = 1;
|
|
editable = (isatty(0) && isatty(1));
|
|
if (iflag == 2 && sflag == 1 && editable)
|
|
iflag = 1;
|
|
if (jflag == 2)
|
|
jflag = iflag;
|
|
for (p = optval ; p < optval + sizeof optval - 1 ; p++)
|
|
if (*p == 2)
|
|
*p = 0;
|
|
arg0 = argv[0];
|
|
if (sflag == 0) {
|
|
arg0 = *argptr++;
|
|
if (minusc == NULL) {
|
|
commandname = arg0;
|
|
setinputfile(commandname, 0);
|
|
}
|
|
}
|
|
shellparam.p = argptr;
|
|
/* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
|
|
while (*argptr) {
|
|
shellparam.nparam++;
|
|
argptr++;
|
|
}
|
|
setinteractive(iflag);
|
|
setjobctl(jflag);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Process shell options. The global variable argptr contains a pointer
|
|
* to the argument list; we advance it past the options.
|
|
*/
|
|
|
|
STATIC void
|
|
options(cmdline) {
|
|
register 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) {
|
|
char *q;
|
|
#ifdef NOHACK /* removing this code allows sh -ce 'foo' for compat */
|
|
if (*p == '\0')
|
|
#endif
|
|
q = *argptr++;
|
|
if (q == NULL || minusc != NULL)
|
|
error("Bad -c option");
|
|
minusc = q;
|
|
#ifdef NOHACK
|
|
break;
|
|
#endif
|
|
} else {
|
|
setoption(c, val);
|
|
}
|
|
}
|
|
if (! cmdline)
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
STATIC void
|
|
setoption(flag, val)
|
|
char flag;
|
|
int val;
|
|
{
|
|
register char *p;
|
|
|
|
if ((p = strchr(optchar, flag)) == NULL)
|
|
error("Illegal option -%c", flag);
|
|
optval[p - optchar] = val;
|
|
}
|
|
|
|
|
|
|
|
#ifdef mkinit
|
|
INCLUDE "options.h"
|
|
|
|
SHELLPROC {
|
|
char *p;
|
|
|
|
for (p = optval ; p < optval + sizeof optval ; p++)
|
|
*p = 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Set the shell parameters.
|
|
*/
|
|
|
|
void
|
|
setparam(argv)
|
|
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(param)
|
|
struct shparam *param;
|
|
{
|
|
char **ap;
|
|
|
|
if (param->malloc) {
|
|
for (ap = param->p ; *ap ; ap++)
|
|
ckfree(*ap);
|
|
ckfree(param->p);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* The shift builtin command.
|
|
*/
|
|
|
|
shiftcmd(argc, argv) char **argv; {
|
|
int n;
|
|
char **ap1, **ap2;
|
|
|
|
n = 1;
|
|
if (argc > 1)
|
|
n = number(argv[1]);
|
|
if (n > shellparam.nparam)
|
|
n = shellparam.nparam;
|
|
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.
|
|
*/
|
|
|
|
setcmd(argc, argv) char **argv; {
|
|
if (argc == 1)
|
|
return showvarscmd(argc, argv);
|
|
INTOFF;
|
|
options(0);
|
|
setinteractive(iflag);
|
|
setjobctl(jflag);
|
|
if (*argptr != NULL) {
|
|
setparam(argptr);
|
|
}
|
|
INTON;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
getoptscmd(argc, argv) char **argv; {
|
|
register char *p, *q;
|
|
char c;
|
|
char s[10];
|
|
|
|
if (argc != 3)
|
|
error("Usage: getopts optstring var");
|
|
if (shellparam.optnext == NULL) {
|
|
shellparam.optnext = shellparam.p;
|
|
shellparam.optptr = NULL;
|
|
}
|
|
if ((p = shellparam.optptr) == NULL || *p == '\0') {
|
|
p = *shellparam.optnext;
|
|
if (p == NULL || *p != '-' || *++p == '\0') {
|
|
atend:
|
|
fmtstr(s, 10, "%d", shellparam.optnext - shellparam.p + 1);
|
|
setvar("OPTIND", s, 0);
|
|
shellparam.optnext = NULL;
|
|
return 1;
|
|
}
|
|
shellparam.optnext++;
|
|
if (p[0] == '-' && p[1] == '\0') /* check for "--" */
|
|
goto atend;
|
|
}
|
|
c = *p++;
|
|
for (q = argv[1] ; *q != c ; ) {
|
|
if (*q == '\0') {
|
|
out1fmt("Illegal option -%c\n", c);
|
|
c = '?';
|
|
goto out;
|
|
}
|
|
if (*++q == ':')
|
|
q++;
|
|
}
|
|
if (*++q == ':') {
|
|
if (*p == '\0') {
|
|
if ((p = *shellparam.optnext) == NULL) {
|
|
out1fmt("No arg for -%c option\n", c);
|
|
c = '?';
|
|
goto out;
|
|
}
|
|
shellparam.optnext++;
|
|
}
|
|
setvar("OPTARG", p, 0);
|
|
p = "";
|
|
}
|
|
out:
|
|
shellparam.optptr = p;
|
|
s[0] = c;
|
|
s[1] = '\0';
|
|
setvar(argv[2], s, 0);
|
|
fmtstr(s, 10, "%d", shellparam.optnext - shellparam.p + 1);
|
|
setvar("OPTIND", s, 0);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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(optstring)
|
|
char *optstring;
|
|
{
|
|
register char *p, *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);
|
|
optarg = p;
|
|
p = NULL;
|
|
}
|
|
optptr = p;
|
|
return c;
|
|
}
|