[openssh.git] / openbsd-compat / getopt.c

/*
 * 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.
 */

#include "includes.h"
#if !defined(HAVE_GETOPT) || !defined(HAVE_GETOPT_OPTRESET)

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: getopt.c,v 1.4 2002/12/08 22:57:14 millert Exp $";
#endif /* LIBC_SCCS and not lint */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int	BSDopterr = 1,		/* if error message should be printed */
	BSDoptind = 1,		/* index into parent argv vector */
	BSDoptopt,		/* character checked for validity */
	BSDoptreset;		/* reset getopt */
char	*BSDoptarg;		/* argument associated with option */

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

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

	if (ostr == NULL)
		return (-1);

	if (BSDoptreset || !*place) {		/* update scanning pointer */
		BSDoptreset = 0;
		if (BSDoptind >= nargc || *(place = nargv[BSDoptind]) != '-') {
			place = EMSG;
			return (-1);
		}
		if (place[1] && *++place == '-') {	/* found "--" */
			++BSDoptind;
			place = EMSG;
			return (-1);
		}
	}					/* option letter okay? */
	if ((BSDoptopt = (int)*place++) == (int)':' ||
	    !(oli = strchr(ostr, BSDoptopt))) {
		/*
		 * if the user didn't specify '-' as an option,
		 * assume it means -1.
		 */
		if (BSDoptopt == (int)'-')
			return (-1);
		if (!*place)
			++BSDoptind;
		if (BSDopterr && *ostr != ':')
			(void)fprintf(stderr,
			    "%s: illegal option -- %c\n", __progname, BSDoptopt);
		return (BADCH);
	}
	if (*++oli != ':') {			/* don't need argument */
		BSDoptarg = NULL;
		if (!*place)
			++BSDoptind;
	}
	else {					/* need an argument */
		if (*place)			/* no white space */
			BSDoptarg = place;
		else if (nargc <= ++BSDoptind) {	/* no arg */
			place = EMSG;
			if (*ostr == ':')
				return (BADARG);
			if (BSDopterr)
				(void)fprintf(stderr,
				    "%s: option requires an argument -- %c\n",
				    __progname, BSDoptopt);
			return (BADCH);
		}
	 	else				/* white space */
			BSDoptarg = nargv[BSDoptind];
		place = EMSG;
		++BSDoptind;
	}
	return (BSDoptopt);			/* dump back option letter */
}

#endif /* !defined(HAVE_GETOPT) || !defined(HAVE_OPTRESET) */
Commit	Line	Data
1812a662	1	/*
	2	* Copyright (c) 1987, 1993, 1994
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
17962c40	34	#include "includes.h"
1812a662	35	#if !defined(HAVE_GETOPT) \|\| !defined(HAVE_GETOPT_OPTRESET)
	36
	37	#if defined(LIBC_SCCS) && !defined(lint)
7bb526ce	38	static char *rcsid = "$OpenBSD: getopt.c,v 1.4 2002/12/08 22:57:14 millert Exp $";
1812a662	39	#endif /* LIBC_SCCS and not lint */
	40
	41	#include <stdio.h>
	42	#include <stdlib.h>
	43	#include <string.h>
	44
d76aa6fb	45	int BSDopterr = 1, /* if error message should be printed */
	46	BSDoptind = 1, /* index into parent argv vector */
	47	BSDoptopt, /* character checked for validity */
	48	BSDoptreset; /* reset getopt */
	49	char BSDoptarg; / argument associated with option */
1812a662	50
	51	#define BADCH (int)'?'
	52	#define BADARG (int)':'
	53	#define EMSG ""
	54
	55	/*
	56	* getopt --
	57	* Parse argc/argv argument vector.
	58	*/
	59	int
cb547f98	60	BSDgetopt(nargc, nargv, ostr)
1812a662	61	int nargc;
	62	char * const *nargv;
	63	const char *ostr;
	64	{
	65	extern char *__progname;
	66	static char place = EMSG; / option letter processing */
	67	char oli; / option letter list index */
	68
7bb526ce	69	if (ostr == NULL)
	70	return (-1);
	71
d76aa6fb	72	if (BSDoptreset \|\| !place) { / update scanning pointer */
	73	BSDoptreset = 0;
	74	if (BSDoptind >= nargc \|\| *(place = nargv[BSDoptind]) != '-') {
1812a662	75	place = EMSG;
	76	return (-1);
	77	}
	78	if (place[1] && ++place == '-') { / found "--" */
d76aa6fb	79	++BSDoptind;
1812a662	80	place = EMSG;
	81	return (-1);
	82	}
	83	} /* option letter okay? */
d76aa6fb	84	if ((BSDoptopt = (int)*place++) == (int)':' \|\|
d76aa6fb	85	!(oli = strchr(ostr, BSDoptopt))) {
1812a662	86	/*
	87	* if the user didn't specify '-' as an option,
	88	* assume it means -1.
	89	*/
d76aa6fb	90	if (BSDoptopt == (int)'-')
1812a662	91	return (-1);
1812a662	92	if (!*place)
d76aa6fb	93	++BSDoptind;
d76aa6fb	94	if (BSDopterr && *ostr != ':')
1812a662	95	(void)fprintf(stderr,
d76aa6fb	96	"%s: illegal option -- %c\n", __progname, BSDoptopt);
1812a662	97	return (BADCH);
	98	}
	99	if (++oli != ':') { / don't need argument */
d76aa6fb	100	BSDoptarg = NULL;
1812a662	101	if (!*place)
d76aa6fb	102	++BSDoptind;
1812a662	103	}
	104	else { /* need an argument */
	105	if (place) / no white space */
d76aa6fb	106	BSDoptarg = place;
d76aa6fb	107	else if (nargc <= ++BSDoptind) { /* no arg */
1812a662	108	place = EMSG;
	109	if (*ostr == ':')
	110	return (BADARG);
d76aa6fb	111	if (BSDopterr)
1812a662	112	(void)fprintf(stderr,
1812a662	113	"%s: option requires an argument -- %c\n",
d76aa6fb	114	__progname, BSDoptopt);
1812a662	115	return (BADCH);
	116	}
	117	else /* white space */
d76aa6fb	118	BSDoptarg = nargv[BSDoptind];
1812a662	119	place = EMSG;
d76aa6fb	120	++BSDoptind;
1812a662	121	}
d76aa6fb	122	return (BSDoptopt); /* dump back option letter */
1812a662	123	}
	124
	125	#endif /* !defined(HAVE_GETOPT) \|\| !defined(HAVE_OPTRESET) */