[apple/libc.git] / stdlib / FreeBSD / getopt.c

/*	$NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $	*/

/*
 * Copyright (c) 1987, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getopt.c	8.3 (Berkeley) 4/27/95";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.7 2004/03/06 17:05:45 ache Exp $");

#include "namespace.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "un-namespace.h"

#include "libc_private.h"

int	opterr = 1,		/* if error message should be printed */
	optind = 1,		/* index into parent argv vector */
	optopt,			/* character checked for validity */
	optreset;		/* reset getopt */
char	*optarg;		/* argument associated with option */

#define	BADCH	(int)'?'
#define	BADARG	(int)':'
#define	EMSG	""

/*
 * getopt --
 *	Parse argc/argv argument vector.
 */
int
getopt(nargc, nargv, ostr)
	int nargc;
	char * const nargv[];
	const char *ostr;
{
	static char *place = EMSG;		/* option letter processing */
	char *oli;				/* option letter list index */

	if (optreset || *place == 0) {		/* update scanning pointer */
		optreset = 0;
		place = nargv[optind];
		if (optind >= nargc || *place++ != '-') {
			/* Argument is absent or is not an option */
			place = EMSG;
			return (-1);
		}
		optopt = *place++;
		if (optopt == '-' && *place == 0) {
			/* "--" => end of options */
			++optind;
			place = EMSG;
			return (-1);
		}
		if (optopt == 0) {
			/* Solitary '-', treat as a '-' option
			   if the program (eg su) is looking for it. */
			place = EMSG;
			if (strchr(ostr, '-') == NULL)
				return (-1);
			optopt = '-';
		}
	} else
		optopt = *place++;

	/* See if option letter is one the caller wanted... */
	if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
		if (*place == 0)
			++optind;
		if (opterr && *ostr != ':')
			(void)fprintf(stderr,
			    "%s: illegal option -- %c\n", _getprogname(),
			    optopt);
		return (BADCH);
	}

	/* Does this option need an argument? */
	if (oli[1] != ':') {
		/* don't need argument */
		optarg = NULL;
		if (*place == 0)
			++optind;
	} else {
		/* Option-argument is either the rest of this argument or the
		   entire next argument. */
		if (*place)
			optarg = place;
		else if (nargc > ++optind)
			optarg = nargv[optind];
		else {
			/* option-argument absent */
			place = EMSG;
			if (*ostr == ':')
				return (BADARG);
			if (opterr)
				(void)fprintf(stderr,
				    "%s: option requires an argument -- %c\n",
				    _getprogname(), optopt);
			return (BADCH);
		}
		place = EMSG;
		++optind;
	}
	return (optopt);			/* return option letter */
}
Commit	Line	Data
3d9156a7 A	1	/* $NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $ */
3d9156a7 A	2
e9ce8d39 A	3	/*
	4	* Copyright (c) 1987, 1993, 1994
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. All advertising materials mentioning features or use of this software
	16	* must display the following acknowledgement:
	17	* This product includes software developed by the University of
	18	* California, Berkeley and its contributors.
	19	* 4. Neither the name of the University nor the names of its contributors
	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
9385eb3d A	36	#if defined(LIBC_SCCS) && !defined(lint)
	37	static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
	38	#endif /* LIBC_SCCS and not lint */
	39	#include <sys/cdefs.h>
3d9156a7	40	__FBSDID("$FreeBSD: src/lib/libc/stdlib/getopt.c,v 1.7 2004/03/06 17:05:45 ache Exp $");
e9ce8d39	41
9385eb3d	42	#include "namespace.h"
e9ce8d39 A	43	#include <stdio.h>
	44	#include <stdlib.h>
	45	#include <string.h>
3d9156a7	46	#include <unistd.h>
9385eb3d	47	#include "un-namespace.h"
e9ce8d39	48
9385eb3d	49	#include "libc_private.h"
e9ce8d39 A	50
	51	int opterr = 1, /* if error message should be printed */
	52	optind = 1, /* index into parent argv vector */
	53	optopt, /* character checked for validity */
	54	optreset; /* reset getopt */
	55	char optarg; / argument associated with option */
	56
	57	#define BADCH (int)'?'
	58	#define BADARG (int)':'
	59	#define EMSG ""
	60
	61	/*
	62	* getopt --
	63	* Parse argc/argv argument vector.
	64	*/
	65	int
	66	getopt(nargc, nargv, ostr)
	67	int nargc;
3d9156a7	68	char * const nargv[];
e9ce8d39 A	69	const char *ostr;
e9ce8d39 A	70	{
e9ce8d39 A	71	static char place = EMSG; / option letter processing */
	72	char oli; / option letter list index */
	73
3d9156a7	74	if (optreset \|\| place == 0) { / update scanning pointer */
e9ce8d39	75	optreset = 0;
3d9156a7 A	76	place = nargv[optind];
	77	if (optind >= nargc \|\| *place++ != '-') {
	78	/* Argument is absent or is not an option */
e9ce8d39	79	place = EMSG;
9385eb3d	80	return (-1);
e9ce8d39	81	}
3d9156a7 A	82	optopt = *place++;
	83	if (optopt == '-' && *place == 0) {
	84	/* "--" => end of options */
e9ce8d39 A	85	++optind;
e9ce8d39 A	86	place = EMSG;
9385eb3d	87	return (-1);
e9ce8d39	88	}
3d9156a7 A	89	if (optopt == 0) {
	90	/* Solitary '-', treat as a '-' option
	91	if the program (eg su) is looking for it. */
	92	place = EMSG;
	93	if (strchr(ostr, '-') == NULL)
	94	return (-1);
	95	optopt = '-';
	96	}
	97	} else
	98	optopt = *place++;
	99
	100	/* See if option letter is one the caller wanted... */
	101	if (optopt == ':' \|\| (oli = strchr(ostr, optopt)) == NULL) {
	102	if (*place == 0)
e9ce8d39	103	++optind;
3d9156a7 A	104	if (opterr && *ostr != ':')
	105	(void)fprintf(stderr,
	106	"%s: illegal option -- %c\n", _getprogname(),
	107	optopt);
e9ce8d39 A	108	return (BADCH);
e9ce8d39 A	109	}
3d9156a7 A	110
	111	/* Does this option need an argument? */
	112	if (oli[1] != ':') {
	113	/* don't need argument */
e9ce8d39	114	optarg = NULL;
3d9156a7	115	if (*place == 0)
e9ce8d39	116	++optind;
3d9156a7 A	117	} else {
	118	/* Option-argument is either the rest of this argument or the
	119	entire next argument. */
	120	if (*place)
e9ce8d39	121	optarg = place;
3d9156a7 A	122	else if (nargc > ++optind)
	123	optarg = nargv[optind];
	124	else {
	125	/* option-argument absent */
e9ce8d39 A	126	place = EMSG;
	127	if (*ostr == ':')
	128	return (BADARG);
	129	if (opterr)
	130	(void)fprintf(stderr,
	131	"%s: option requires an argument -- %c\n",
9385eb3d	132	_getprogname(), optopt);
e9ce8d39 A	133	return (BADCH);
e9ce8d39 A	134	}
e9ce8d39 A	135	place = EMSG;
	136	++optind;
	137	}
3d9156a7	138	return (optopt); /* return option letter */
e9ce8d39	139	}