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/* OPENBSD ORIGINAL: lib/libc/stdlib/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. 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 1.5 2003/06/02 20:18:37 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) */
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