| /* |
| * 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 defined(LIBC_SCCS) && !defined(lint) |
| static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; |
| #endif /* LIBC_SCCS and not lint */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.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(nargc, nargv, ostr) |
| int nargc; |
| char * const *nargv; |
| const char *ostr; |
| { |
| extern char *program_name; |
| 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 (-1); |
| } |
| if (place[1] && *++place == '-') { /* found "--" */ |
| ++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", program_name, 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", |
| program_name, optopt); |
| return (BADCH); |
| } |
| else /* white space */ |
| optarg = nargv[optind]; |
| place = EMSG; |
| ++optind; |
| } |
| return (optopt); /* dump back option letter */ |
| } |