2 * Copyright (c) 1987, 1993
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. 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
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)getopt.c 8.1 (Berkeley) 6/4/93";
32 #endif /* LIBC_SCCS and not lint */
45 * get option letter from argument vector
47 ROKEN_LIB_VARIABLE int opterr = 1; /* if error message should be printed */
48 ROKEN_LIB_VARIABLE int optind = 1; /* index into parent argv vector */
49 ROKEN_LIB_VARIABLE int optopt; /* character checked for validity */
50 int optreset; /* reset getopt */
51 ROKEN_LIB_VARIABLE char *optarg; /* argument associated with option */
53 #define BADCH (int)'?'
54 #define BADARG (int)':'
57 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
58 getopt(int nargc, char * const *nargv, const char *ostr)
60 static char *place = EMSG; /* option letter processing */
61 char *oli; /* option letter list index */
64 if (optreset || !*place) { /* update scanning pointer */
66 if (optind >= nargc || *(place = nargv[optind]) != '-') {
70 if (place[1] && *++place == '-') { /* found "--" */
75 } /* option letter okay? */
76 if ((optopt = (int)*place++) == (int)':' ||
77 !(oli = strchr(ostr, optopt))) {
79 * if the user didn't specify '-' as an option,
80 * assume it means -1 (EOF).
82 if (optopt == (int)'-')
86 if (opterr && *ostr != ':') {
87 if (!(p = strrchr(*nargv, '/')))
91 fprintf(stderr, "%s: illegal option -- %c\n",
96 if (*++oli != ':') { /* don't need argument */
101 else { /* need an argument */
102 if (*place) /* no white space */
104 else if (nargc <= ++optind) { /* no arg */
106 if (!(p = strrchr(*nargv, '/')))
114 "%s: option requires an argument -- %c\n",
118 else /* white space */
119 optarg = nargv[optind];
123 return(optopt); /* dump back option letter */