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. 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
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)getopt.c 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
46 * get option letter from argument vector
48 int opterr = 1, /* if error message should be printed */
49 optind = 1, /* index into parent argv vector */
50 optopt, /* character checked for validity */
51 optreset; /* reset getopt */
52 char *optarg; /* argument associated with option */
54 #define BADCH (int)'?'
55 #define BADARG (int)':'
59 getopt(nargc, nargv, ostr)
64 static char *place = EMSG; /* option letter processing */
65 char *oli; /* option letter list index */
68 if (optreset || !*place) { /* update scanning pointer */
70 if (optind >= nargc || *(place = nargv[optind]) != '-') {
74 if (place[1] && *++place == '-') { /* found "--" */
79 } /* option letter okay? */
80 if ((optopt = (int)*place++) == (int)':' ||
81 !(oli = strchr(ostr, optopt))) {
83 * if the user didn't specify '-' as an option,
84 * assume it means -1 (EOF).
86 if (optopt == (int)'-')
90 if (opterr && *ostr != ':') {
91 if (!(p = strrchr(*nargv, '/')))
95 fprintf(stderr, "%s: illegal option -- %c\n",
100 if (*++oli != ':') { /* don't need argument */
105 else { /* need an argument */
106 if (*place) /* no white space */
108 else if (nargc <= ++optind) { /* no arg */
110 if (!(p = strrchr(*nargv, '/')))
118 "%s: option requires an argument -- %c\n",
122 else /* white space */
123 optarg = nargv[optind];
127 return(optopt); /* dump back option letter */