| /* |
| * 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. |
| */ |
| |
| #if 0 |
| static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; |
| __RCSID("$NetBSD: getopt.c,v 1.26 2003/08/07 16:43:40 agc Exp $"); |
| #endif |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include "libport.h" |
| |
| 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 */ |
| |
| #define BADCH (int)'?' |
| #define BADARG (int)':' |
| #define EMSG "" |
| |
| /* |
| * getopt -- |
| * Parse argc/argv argument vector. |
| */ |
| int |
| getopt(int argc, char * const argv[], const char *optstring) |
| { |
| static char *place = EMSG; /* option letter processing */ |
| char *oli; /* option letter list index */ |
| |
| if (optreset || *place == 0) { /* update scanning pointer */ |
| optreset = 0; |
| place = argv[optind]; |
| if (optind >= argc || *place++ != '-') { |
| /* Argument is absent or is not an option */ |
| place = EMSG; |
| return (-1); |
| } |
| optopt = *place++; |
| if (optopt == '-' && *place == 0) { |
| /* "--" => end of options */ |
| ++optind; |
| place = EMSG; |
| return (-1); |
| } |
| if (optopt == 0) { |
| /* Solitary '-', treat as a '-' option |
| if the program (eg su) is looking for it. */ |
| place = EMSG; |
| if (strchr(optstring, '-') == NULL) |
| return -1; |
| optopt = '-'; |
| } |
| } else |
| optopt = *place++; |
| |
| /* See if option letter is one the caller wanted... */ |
| if (optopt == ':' || (oli = strchr(optstring, optopt)) == NULL) { |
| if (*place == 0) |
| ++optind; |
| if (opterr && *optstring != ':') |
| (void)fprintf(stderr, |
| "unknown option -- %c\n", optopt); |
| return (BADCH); |
| } |
| |
| /* Does this option need an argument? */ |
| if (oli[1] != ':') { |
| /* don't need argument */ |
| optarg = NULL; |
| if (*place == 0) |
| ++optind; |
| } else { |
| /* Option-argument is either the rest of this argument or the |
| entire next argument. */ |
| if (*place) |
| optarg = place; |
| else if (argc > ++optind) |
| optarg = argv[optind]; |
| else { |
| /* option-argument absent */ |
| place = EMSG; |
| if (*optstring == ':') |
| return (BADARG); |
| if (opterr) |
| (void)fprintf(stderr, |
| "option requires an argument -- %c\n", |
| optopt); |
| return (BADCH); |
| } |
| place = EMSG; |
| ++optind; |
| } |
| return (optopt); /* return option letter */ |
| } |