2 * Copyright (c) 1990, 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[] = "@(#)getsubopt.c 8.1 (Berkeley) 6/4/93";
36 #endif /* LIBC_SCCS and not lint */
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
44 * The SVID interface to getsubopt provides no way of figuring out which
45 * part of the suboptions list wasn't matched. This makes error messages
46 * tricky... The extern variable suboptarg is a pointer to the token
52 getsubopt(optionp, tokens, valuep)
53 char **optionp, **valuep;
59 suboptarg = *valuep = NULL;
61 if (!optionp || !*optionp)
64 /* skip leading white-space, commas */
65 for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
72 /* save the start of the token, and skip the rest of the token. */
74 *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
78 * If there's an equals sign, set the value pointer, and
79 * skip over the value part of the token. Terminate the
85 *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
90 /* Skip any whitespace or commas after this token. */
91 for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
94 /* set optionp for next round. */
97 for (cnt = 0; *tokens; ++tokens, ++cnt)
98 if (!strcmp(suboptarg, *tokens))