[unix-history] / bin / sh / options.c

/*-
 * 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[] = "from: @(#)options.c	5.2 (Berkeley) 3/13/91";*/
static char rcsid[] = "options.c,v 1.4 1993/08/01 18:58:04 mycroft Exp";
#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;
}
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1991 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Kenneth Almquist.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*/
	36
	37	#ifndef lint
68de1ca3 AM	38	/static char sccsid[] = "from: @(#)options.c 5.2 (Berkeley) 3/13/91";/
68de1ca3 AM	39	static char rcsid[] = "options.c,v 1.4 1993/08/01 18:58:04 mycroft Exp";
15637ed4 RG	40	#endif /* not lint */
	41
	42	#include "shell.h"
	43	#define DEFINE_OPTIONS
	44	#include "options.h"
	45	#undef DEFINE_OPTIONS
	46	#include "nodes.h" /* for other header files */
	47	#include "eval.h"
	48	#include "jobs.h"
	49	#include "input.h"
	50	#include "output.h"
	51	#include "trap.h"
	52	#include "var.h"
	53	#include "memalloc.h"
	54	#include "error.h"
	55	#include "mystring.h"
	56
	57	char arg0; / value of $0 */
	58	struct shparam shellparam; /* current positional parameters */
	59	char *argptr; / argument list for builtin commands */
	60	char optarg; / set by nextopt (like getopt) */
	61	char optptr; / used by nextopt */
	62
	63	char minusc; / argument to -c option */
	64
	65
	66	#ifdef __STDC__
	67	STATIC void options(int);
	68	STATIC void setoption(int, int);
	69	#else
	70	STATIC void options();
	71	STATIC void setoption();
	72	#endif
	73
	74
	75
	76	/*
	77	* Process the shell command line arguments.
	78	*/
	79
	80	void
	81	procargs(argc, argv)
	82	char **argv;
	83	{
	84	char *p;
	85
	86	argptr = argv;
	87	if (argc > 0)
	88	argptr++;
	89	for (p = optval ; p < optval + sizeof optval - 1 ; p++)
	90	*p = 2;
	91	options(1);
	92	if (*argptr == NULL && minusc == NULL)
	93	sflag = 1;
	94	if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
	95	iflag = 1;
	96	if (jflag == 2)
	97	jflag = iflag;
	98	for (p = optval ; p < optval + sizeof optval - 1 ; p++)
	99	if (*p == 2)
	100	*p = 0;
	101	arg0 = argv[0];
	102	if (sflag == 0 && minusc == NULL) {
	103	commandname = arg0 = *argptr++;
104	setinputfile(commandname, 0);
105	}
106	shellparam.p = argptr;
107	/* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
108	while (*argptr) {
109	shellparam.nparam++;
110	argptr++;
111	}
112	setinteractive(iflag);
113	setjobctl(jflag);
114	}
115
116
117
118	/*
119	* Process shell options. The global variable argptr contains a pointer
120	* to the argument list; we advance it past the options.
121	*/
122
123	STATIC void
124	options(cmdline) {
125	register char *p;
126	int val;
127	int c;
128
129	if (cmdline)
130	minusc = NULL;
131	while ((p = *argptr) != NULL) {
132	argptr++;
133	if ((c = *p++) == '-') {
134	val = 1;
135	if (p[0] == '\0' \|\| p[0] == '-' && p[1] == '\0') {
136	if (!cmdline) {
137	/* "-" means turn off -x and -v */
138	if (p[0] == '\0')
139	xflag = vflag = 0;
140	/* "--" means reset params */
141	else if (*argptr == NULL)
142	setparam(argptr);
143	}
144	break; /* "-" or "--" terminates options */
145	}
146	} else if (c == '+') {
147	val = 0;
148	} else {
149	argptr--;
150	break;
151	}
152	while ((c = *p++) != '\0') {
153	if (c == 'c' && cmdline) {
154	char *q;
155	#ifdef NOHACK /* removing this code allows sh -ce 'foo' for compat */
156	if (*p == '\0')
157	#endif
158	q = *argptr++;
159	if (q == NULL \|\| minusc != NULL)
160	error("Bad -c option");
161	minusc = q;
162	#ifdef NOHACK
163	break;
164	#endif
165	} else {
166	setoption(c, val);
167	}
168	}
169	if (! cmdline)
170	break;
171	}
172	}
173
174
175	STATIC void
176	setoption(flag, val)
177	char flag;
178	int val;
179	{
180	register char *p;
181
182	if ((p = strchr(optchar, flag)) == NULL)
183	error("Illegal option -%c", flag);
184	optval[p - optchar] = val;
185	}
186
187
188
189	#ifdef mkinit
190	INCLUDE "options.h"
191
192	SHELLPROC {
193	char *p;
194
195	for (p = optval ; p < optval + sizeof optval ; p++)
196	*p = 0;
197	}
198	#endif
199
200
201	/*
202	* Set the shell parameters.
203	*/
204
205	void
206	setparam(argv)
207	char **argv;
208	{
209	char **newparam;
210	char **ap;
211	int nparam;
212
213	for (nparam = 0 ; argv[nparam] ; nparam++);
214	ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
215	while (*argv) {
216	ap++ = savestr(argv++);
217	}
218	*ap = NULL;
219	freeparam(&shellparam);
220	shellparam.malloc = 1;
221	shellparam.nparam = nparam;
222	shellparam.p = newparam;
223	shellparam.optnext = NULL;
224	}
225
226
227	/*
228	* Free the list of positional parameters.
229	*/
230
231	void
232	freeparam(param)
233	struct shparam *param;
234	{
235	char **ap;
236
237	if (param->malloc) {
238	for (ap = param->p ; *ap ; ap++)
239	ckfree(*ap);
240	ckfree(param->p);
241	}
242	}
243
244
245
246	/*
247	* The shift builtin command.
248	*/
249
250	shiftcmd(argc, argv) char **argv; {
251	int n;
252	char ap1, ap2;
253
254	n = 1;
255	if (argc > 1)
256	n = number(argv[1]);
257	if (n > shellparam.nparam)
258	n = shellparam.nparam;
259	INTOFF;
260	shellparam.nparam -= n;
261	for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
262	if (shellparam.malloc)
263	ckfree(*ap1);
264	}
265	ap2 = shellparam.p;
266	while ((ap2++ = ap1++) != NULL);
267	shellparam.optnext = NULL;
268	INTON;
269	return 0;
270	}
271
272
273
274	/*
275	* The set command builtin.
276	*/
277
278	setcmd(argc, argv) char **argv; {
279	if (argc == 1)
280	return showvarscmd(argc, argv);
281	INTOFF;
282	options(0);
283	setinteractive(iflag);
284	setjobctl(jflag);
285	if (*argptr != NULL) {
286	setparam(argptr);
287	}
288	INTON;
289	return 0;
290	}
291
292
293	/*
294	* The getopts builtin. Shellparam.optnext points to the next argument
295	* to be processed. Shellparam.optptr points to the next character to
296	* be processed in the current argument. If shellparam.optnext is NULL,
297	* then it's the first time getopts has been called.
298	*/
299
300	getoptscmd(argc, argv) char **argv; {
301	register char p, q;
302	char c;
303	char s[10];
304
305	if (argc != 3)
306	error("Usage: getopts optstring var");
307	if (shellparam.optnext == NULL) {
308	shellparam.optnext = shellparam.p;
309	shellparam.optptr = NULL;
310	}
311	if ((p = shellparam.optptr) == NULL \|\| *p == '\0') {
312	p = *shellparam.optnext;
313	if (p == NULL \|\| p != '-' \|\| ++p == '\0') {
314	atend:
315	fmtstr(s, 10, "%d", shellparam.optnext - shellparam.p + 1);
316	setvar("OPTIND", s, 0);
317	shellparam.optnext = NULL;
318	return 1;
319	}
320	shellparam.optnext++;
321	if (p[0] == '-' && p[1] == '\0') /* check for "--" */
322	goto atend;
323	}
324	c = *p++;
325	for (q = argv[1] ; *q != c ; ) {
326	if (*q == '\0') {
327	out1fmt("Illegal option -%c\n", c);
328	c = '?';
329	goto out;
330	}
331	if (*++q == ':')
332	q++;
333	}
334	if (*++q == ':') {
335	if (p == '\0' && (p = shellparam.optnext) == NULL) {
336	out1fmt("No arg for -%c option\n", c);
337	c = '?';
338	goto out;
339	}
340	shellparam.optnext++;
341	setvar("OPTARG", p, 0);
342	p = NULL;
343	}
344	out:
345	shellparam.optptr = p;
346	s[0] = c;
347	s[1] = '\0';
348	setvar(argv[2], s, 0);
349	return 0;
350	}
351
352	/*
353	* Standard option processing (a la getopt) for builtin routines. The
354	* only argument that is passed to nextopt is the option string; the
355	* other arguments are unnecessary. It return the character, or '\0' on
356	* end of input.
357	*/
358
359	int
360	nextopt(optstring)
361	char *optstring;
362	{
363	register char p, q;
364	char c;
365
366	if ((p = optptr) == NULL \|\| *p == '\0') {
367	p = *argptr;
368	if (p == NULL \|\| p != '-' \|\| ++p == '\0')
369	return '\0';
370	argptr++;
371	if (p[0] == '-' && p[1] == '\0') /* check for "--" */
372	return '\0';
373	}
374	c = *p++;
375	for (q = optstring ; *q != c ; ) {
376	if (*q == '\0')
377	error("Illegal option -%c", c);
378	if (*++q == ':')
379	q++;
380	}
381	if (*++q == ':') {
382	if (p == '\0' && (p = argptr++) == NULL)
383	error("No arg for -%c option", c);
384	optarg = p;
385	p = NULL;
386	}
387	optptr = p;
388	return c;
389	}