| /* |
| * getopt.c -- |
| * |
| * Standard UNIX getopt function. Code is from BSD. |
| * |
| * Copyright (c) 1987-2002 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: |
| * |
| * A. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * B. 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. |
| * C. Neither the names of the copyright holders 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 COPYRIGHT HOLDERS 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 !defined(lint) |
| * static char sccsid[] = "@(#)getopt.c 8.2 (Berkeley) 4/2/94"; |
| * #endif |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "getopt.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 nargc, char *const *nargv, const char *ostr) { |
| static char *place = EMSG; /* option letter processing */ |
| char *oli; /* option letter list index */ |
| |
| if (optreset || !*place) { /* update scanning pointer */ |
| optreset = 0; |
| if (optind >= nargc || *(place = nargv[optind]) != '-') { |
| place = EMSG; |
| return (EOF); |
| } |
| if (place[1] && *++place == '-') { /* found "--" */ |
| ++optind; |
| place = EMSG; |
| return (EOF); |
| } |
| } /* option letter okay? */ |
| if ((optopt = (int)*place++) == (int)':' || !(oli = (char *)strchr(ostr, optopt))) { |
| /* |
| * if the user didn't specify '-' as an option, |
| * assume it means EOF. |
| */ |
| if (optopt == (int)'-') |
| return (EOF); |
| if (!*place) |
| ++optind; |
| if (opterr && *ostr != ':') |
| (void)fprintf(stderr, "illegal option -- %c\n", 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, "option requires an argument -- %c\n", optopt); |
| return (BADCH); |
| } |
| else /* white space */ |
| optarg = nargv[optind]; |
| place = EMSG; |
| ++optind; |
| } |
| return (optopt); /* dump back option letter */ |
| } |