2 * Copyright (c) 1987, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 /* last review : october 29th, 2002 */
36 #if defined(LIBC_SCCS) && !defined(lint)
37 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
38 #endif /* LIBC_SCCS and not lint */
44 int opterr = 1, /* if error message should be printed */
45 optind = 1, /* index into parent argv vector */
46 optopt, /* character checked for validity */
47 optreset; /* reset getopt */
48 char *optarg; /* argument associated with option */
50 #define BADCH (int)'?'
51 #define BADARG (int)':'
56 * Parse argc/argv argument vector.
58 int getopt(int nargc, char *const *nargv, const char *ostr)
61 # define __progname nargv[0] /* program name */
63 static char *place = EMSG; /* option letter processing */
64 char *oli; /* option letter list index */
66 if (optreset || !*place) { /* update scanning pointer */
68 if (optind >= nargc || *(place = nargv[optind]) != '-') {
72 if (place[1] && *++place == '-') { /* found "--" */
77 } /* option letter okay? */
79 if ((optopt = (int) * place++) == (int) ':' || !(oli = strchr(ostr, optopt))) {
80 /* if the user didn't specify '-' as an option, assume it means -1. */
81 if (optopt == (int) '-') {
87 if (opterr && *ostr != ':') {
88 (void) fprintf(stdout, "[ERROR] %s: illegal option -- %c\n", __progname,
94 if (*++oli != ':') { /* don't need argument */
99 } else { /* need an argument */
100 if (*place) { /* no white space */
102 } else if (nargc <= ++optind) { /* no arg */
108 (void) fprintf(stdout, "[ERROR] %s: option requires an argument -- %c\n",
112 } else { /* white space */
113 optarg = nargv[optind];
118 return (optopt); /* dump back option letter */