/* $NetBSD: getopt.c,v 1.16 1999/12/02 13:15:56 kleink 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 0 | |
static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; | |
#endif | |
#include <assert.h> | |
#include <errno.h> | |
#include <stdio.h> | |
#include <string.h> | |
#define __P(x) x | |
#define _DIAGASSERT(x) assert(x) | |
#ifdef __weak_alias | |
__weak_alias(getopt,_getopt); | |
#endif | |
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 */ | |
static char * _progname __P((char *)); | |
int getopt_internal __P((int, char * const *, const char *)); | |
static char * | |
_progname(nargv0) | |
char * nargv0; | |
{ | |
char * tmp; | |
_DIAGASSERT(nargv0 != NULL); | |
tmp = strrchr(nargv0, '/'); | |
if (tmp) | |
tmp++; | |
else | |
tmp = nargv0; | |
return(tmp); | |
} | |
#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 *__progname = 0; | |
static char *place = EMSG; /* option letter processing */ | |
char *oli; /* option letter list index */ | |
__progname = __progname?__progname:_progname(*nargv); | |
_DIAGASSERT(nargv != NULL); | |
_DIAGASSERT(ostr != NULL); | |
if (optreset || !*place) { /* update scanning pointer */ | |
optreset = 0; | |
if (optind >= nargc || *(place = nargv[optind]) != '-') { | |
place = EMSG; | |
return (-1); | |
} | |
if (place[1] && *++place == '-' /* found "--" */ | |
&& place[1] == '\0') { | |
++optind; | |
place = EMSG; | |
return (-1); | |
} | |
} /* option letter okay? */ | |
if ((optopt = (int)*place++) == (int)':' || | |
!(oli = strchr(ostr, optopt))) { | |
/* | |
* if the user didn't specify '-' as an option, | |
* assume it means -1. | |
*/ | |
if (optopt == (int)'-') | |
return (-1); | |
if (!*place) | |
++optind; | |
if (opterr && *ostr != ':') | |
(void)fprintf(stderr, | |
"%s: illegal option -- %c\n", __progname, optopt); | |
return (BADCH); | |
} | |
if (*++oli != ':') { /* don't need argument */ | |
optarg = NULL; | |
if (!*place) | |
++optind; | |
} | |
else { /* need an argument */ | |
if (*place) /* no white space */ | |
optarg = place; | |
else if (nargc <= ++optind) { /* no arg */ | |
place = EMSG; | |
if (*ostr == ':') | |
return (BADARG); | |
if (opterr) | |
(void)fprintf(stderr, | |
"%s: option requires an argument -- %c\n", | |
__progname, optopt); | |
return (BADCH); | |
} | |
else /* white space */ | |
optarg = nargv[optind]; | |
place = EMSG; | |
++optind; | |
} | |
return (optopt); /* dump back option letter */ | |
} | |