9109761318
cleanups, handling 'ls -l-', handling '--*' Note this is in the same time back out of our v1.3 "Don't print an error message if the bad option is '?'" because it directly violates POSIX.
140 lines
4.3 KiB
C
140 lines
4.3 KiB
C
/* $NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $ */
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/*
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* Copyright (c) 1987, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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int opterr = 1, /* if error message should be printed */
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optind = 1, /* index into parent argv vector */
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optopt, /* character checked for validity */
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optreset; /* reset getopt */
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char *optarg; /* argument associated with option */
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#define BADCH (int)'?'
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#define BADARG (int)':'
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#define EMSG ""
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/*
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* getopt --
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* Parse argc/argv argument vector.
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*/
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int
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getopt(nargc, nargv, ostr)
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int nargc;
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char * const nargv[];
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const char *ostr;
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{
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static char *place = EMSG; /* option letter processing */
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char *oli; /* option letter list index */
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if (optreset || *place == 0) { /* update scanning pointer */
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optreset = 0;
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place = nargv[optind];
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if (optind >= nargc || *place++ != '-') {
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/* Argument is absent or is not an option */
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place = EMSG;
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return (-1);
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}
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optopt = *place++;
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if (optopt == '-' && *place == 0) {
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/* "--" => end of options */
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++optind;
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place = EMSG;
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return (-1);
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}
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if (optopt == 0) {
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/* Solitary '-', treat as a '-' option
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if the program (eg su) is looking for it. */
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place = EMSG;
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if (strchr(ostr, '-') == NULL)
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return (-1);
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optopt = '-';
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}
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} else
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optopt = *place++;
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/* See if option letter is one the caller wanted... */
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if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
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if (*place == 0)
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++optind;
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if (opterr && *ostr != ':')
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(void)fprintf(stderr,
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"%s: illegal option -- %c\n", _getprogname(),
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optopt);
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return (BADCH);
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}
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/* Does this option need an argument? */
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if (oli[1] != ':') {
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/* don't need argument */
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optarg = NULL;
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if (*place == 0)
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++optind;
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} else {
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/* Option-argument is either the rest of this argument or the
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entire next argument. */
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if (*place)
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optarg = place;
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else if (nargc > ++optind)
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optarg = nargv[optind];
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else {
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/* option-argument absent */
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place = EMSG;
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if (*ostr == ':')
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return (BADARG);
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if (opterr)
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(void)fprintf(stderr,
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"%s: option requires an argument -- %c\n",
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_getprogname(), optopt);
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return (BADCH);
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}
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place = EMSG;
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++optind;
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}
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return (optopt); /* return option letter */
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}
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