2 #define __UNCONST(a) ((void *)(a))
3 #define _DIAGASSERT(cond) assert((cond))
4 #define getprogname() ((const char *)nargv[0])
6 /* $NetBSD: getopt.c,v 1.29 2014/06/05 22:00:22 christos Exp $ */
9 * Copyright (c) 1987, 1993, 1994
10 * The Regents of the University of California. All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/cdefs.h>
39 __RCSID("$NetBSD: getopt.c,v 1.29 2014/06/05 22:00:22 christos Exp $");
41 #include "namespace.h"
52 __weak_alias(getopt,_getopt)
55 int opterr = 1, /* if error message should be printed */
56 optind = 1, /* index into parent argv vector */
57 optopt, /* character checked for validity */
58 optreset; /* reset getopt */
59 char *optarg; /* argument associated with option */
61 #define BADCH (int)'?'
62 #define BADARG (int)':'
67 * Parse argc/argv argument vector.
70 getopt(int nargc, char * const nargv[], const char *ostr)
72 static const char *place = EMSG; /* option letter processing */
73 char *oli; /* option letter list index */
75 _DIAGASSERT(nargv != NULL);
76 _DIAGASSERT(ostr != NULL);
78 if (optreset || *place == 0) { /* update scanning pointer */
80 place = nargv[optind];
81 if (optind >= nargc || *place++ != '-') {
82 /* Argument is absent or is not an option */
87 if (optopt == '-' && *place == 0) {
88 /* "--" => end of options */
94 /* Solitary '-', treat as a '-' option
95 if the program (eg su) is looking for it. */
97 if (strchr(ostr, '-') == NULL)
104 /* See if option letter is one the caller wanted... */
105 if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
108 if (opterr && *ostr != ':')
109 (void)fprintf(stderr,
110 "%s: unknown option -- %c\n", getprogname(),
115 /* Does this option need an argument? */
117 /* don't need argument */
122 /* Option-argument is either the rest of this argument or the
123 entire next argument. */
125 optarg = __UNCONST(place);
126 else if (oli[2] == ':')
128 * GNU Extension, for optional arguments if the rest of
129 * the argument is empty, we return NULL
132 else if (nargc > ++optind)
133 optarg = nargv[optind];
135 /* option-argument absent */
140 (void)fprintf(stderr,
141 "%s: option requires an argument -- %c\n",
142 getprogname(), optopt);
148 return (optopt); /* return option letter */