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
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13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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30 #include <sys/cdefs.h>
31 #if defined(LIBC_SCCS) && !defined(lint)
32 static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
33 #endif /* LIBC_SCCS and not lint */
38 int opterr = 1, /* if error message should be printed */
39 optind = 1, /* index into parent argv vector */
40 optopt, /* character checked for validity */
41 optreset; /* reset getopt */
42 char *optarg; /* argument associated with option */
44 #define BADCH (int)'?'
45 #define BADARG (int)':'
50 * Parse argc/argv argument vector.
53 getopt(int nargc, char * const *nargv, const char *ostr)
55 static char *place = EMSG; /* option letter processing */
56 char *oli; /* option letter list index */
58 if (optreset || !*place) { /* update scanning pointer */
60 if (optind >= nargc || *(place = nargv[optind]) != '-') {
64 if (place[1] && *++place == '-') { /* found "--" */
69 } /* option letter okay? */
70 if ((optopt = (int)*place++) == (int)':' ||
71 !(oli = strchr(ostr, optopt))) {
73 * if the user didn't specify '-' as an option,
76 if (optopt == (int)'-')
80 if (opterr && *ostr != ':')
81 (void)printf("illegal option -- %c\n", optopt);
84 if (*++oli != ':') { /* don't need argument */
89 else { /* need an argument */
90 if (*place) /* no white space */
92 else if (nargc <= ++optind) { /* no arg */
97 (void)printf("option requires an argument -- %c\n", optopt);
100 else /* white space */
101 optarg = nargv[optind];
105 return (optopt); /* dump back option letter */