1#ifdef HAVE_CONFIG_H
2#include "config.h"
3#endif
4
5#ifdef HAVE_GETSUBOPT
6
7int dummy;
8
9#else
10
11/*	$OpenBSD: getsubopt.c,v 1.4 2005/08/08 08:05:36 espie Exp $	*/
12
13/*-
14 * Copyright (c) 1990, 1993
15 *	The Regents of the University of California.  All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 *    notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 *    notice, this list of conditions and the following disclaimer in the
24 *    documentation and/or other materials provided with the distribution.
25 * 3. Neither the name of the University nor the names of its contributors
26 *    may be used to endorse or promote products derived from this software
27 *    without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 */
41
42#include <unistd.h>
43#include <stdlib.h>
44#include <string.h>
45
46/*
47 * The SVID interface to getsubopt provides no way of figuring out which
48 * part of the suboptions list wasn't matched.  This makes error messages
49 * tricky...  The extern variable suboptarg is a pointer to the token
50 * which didn't match.
51 */
52char *suboptarg;
53
54int
55getsubopt(char **optionp, char * const *tokens, char **valuep)
56{
57	int cnt;
58	char *p;
59
60	suboptarg = *valuep = NULL;
61
62	if (!optionp || !*optionp)
63		return(-1);
64
65	/* skip leading white-space, commas */
66	for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
67
68	if (!*p) {
69		*optionp = p;
70		return(-1);
71	}
72
73	/* save the start of the token, and skip the rest of the token. */
74	for (suboptarg = p;
75	    *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
76
77	if (*p) {
78		/*
79		 * If there's an equals sign, set the value pointer, and
80		 * skip over the value part of the token.  Terminate the
81		 * token.
82		 */
83		if (*p == '=') {
84			*p = '\0';
85			for (*valuep = ++p;
86			    *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
87			if (*p)
88				*p++ = '\0';
89		} else
90			*p++ = '\0';
91		/* Skip any whitespace or commas after this token. */
92		for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
93	}
94
95	/* set optionp for next round. */
96	*optionp = p;
97
98	for (cnt = 0; *tokens; ++tokens, ++cnt)
99		if (!strcmp(suboptarg, *tokens))
100			return(cnt);
101	return(-1);
102}
103
104#endif
105