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