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- /*-
- * 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 */
-
- 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;
- if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
- 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 && minusc == NULL) {
- commandname = arg0 = *argptr++;
- 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' && (p = *shellparam.optnext) == NULL) {
- out1fmt("No arg for -%c option\n", c);
- c = '?';
- goto out;
- }
- shellparam.optnext++;
- setvar("OPTARG", p, 0);
- p = NULL;
- }
- out:
- shellparam.optptr = p;
- s[0] = c;
- s[1] = '\0';
- setvar(argv[2], 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;
- }
-