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/* $NetBSD: getopt.c,v 1.29 2014/06/05 22:00:22 christos Exp $ */ |
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|
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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. 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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|
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#ifdef HAVE_CONFIG_H |
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# include "config.h" |
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#endif |
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#if !defined(HAVE_GETOPT) || defined(WANT_GETOPT_LONG) || defined(BROKEN_GETOPT) |
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#include <sys/cdefs.h> |
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|
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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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|
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|
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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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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 = BADCH, /* 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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|
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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(int nargc, char * const nargv[], const char *ostr) |
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{ |
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extern char *__progname; |
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static const char *place = EMSG; /* option letter processing */ |
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char *oli; /* option letter list index */ |
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|
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#ifndef BSD4_4 |
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if (!__progname) { |
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if (__progname = strrchr(nargv[0], '/')) |
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++__progname; |
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else |
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__progname = nargv[0]; |
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} |
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#endif |
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|
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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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|
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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: unknown option -- %c\n", __progname, optopt); |
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return (BADCH); |
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} |
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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 = __UNCONST(place); |
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else if (oli[2] == ':') |
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/* |
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* GNU Extension, for optional arguments if the rest of |
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* the argument is empty, we return NULL |
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*/ |
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optarg = NULL; |
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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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__progname, 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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#endif |
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#ifdef MAIN |
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#ifndef BSD4_4 |
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char *__progname; |
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#endif |
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|
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int |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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int c; |
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char *opts = argv[1]; |
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|
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--argc; |
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++argv; |
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|
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while ((c = getopt(argc, argv, opts)) != EOF) { |
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switch (c) { |
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case '-': |
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if (optarg) |
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printf("--%s ", optarg); |
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break; |
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case '?': |
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exit(1); |
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break; |
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default: |
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if (optarg) |
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printf("-%c %s ", c, optarg); |
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else |
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printf("-%c ", c); |
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break; |
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} |
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} |
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|
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if (optind < argc) { |
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printf("-- "); |
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for (; optind < argc; ++optind) { |
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printf("%s ", argv[optind]); |
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} |
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} |
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printf("\n"); |
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exit(0); |
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} |
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#endif |
