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
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #if defined(LIBC_SCCS) && !defined(lint)
36 * static char sccsid[] = "from: @(#)getopt.c 8.2 (Berkeley) 4/2/94";
39 "$Id: getopt.c,v 5.0 2002/04/20 07:30:20 hardaker Exp $";
40 #endif /* LIBC_SCCS and not lint */
47 extern char *__progname;
49 #define __progname "getopt"
52 int opterr = 1, /* if error message should be printed */
53 optind = 1, /* index into parent argv vector */
54 optopt, /* character checked for validity */
55 optreset; /* reset getopt */
56 char *optarg; /* argument associated with option */
59 #define BADCH (int)'?'
60 #define BADARG (int)':'
64 * Parse argc/argv argument vector.
67 getopt(int nargc, char *const *nargv, const char *ostr)
69 static char *place = EMSG; /* option letter processing */
70 char *oli; /* option letter list index */
72 if (optreset || !*place) { /* update scanning pointer */
74 if (optind >= nargc || *(place = nargv[optind]) != '-') {
78 if (place[1] && *++place == '-') { /* found "--" */
83 } /* option letter okay? */
84 if ((optopt = (int) *place++) == (int) ':' ||
85 !(oli = strchr(ostr, optopt))) {
87 * if the user didn't specify '-' as an option,
90 if (optopt == (int) '-')
94 if (opterr && *ostr != ':')
95 (void) fprintf(stderr,
96 "%s: illegal option -- %c\n", __progname,
100 if (*++oli != ':') { /* don't need argument */
104 } else { /* need an argument */
105 if (*place) /* no white space */
107 else if (nargc <= ++optind) { /* no arg */
112 (void) fprintf(stderr,
113 "%s: option requires an argument -- %c\n",
116 } else /* white space */
117 optarg = nargv[optind];
121 return (optopt); /* dump back option letter */