vfslist.c revision 128073 
1/*-
2 * Copyright (c) 1995
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31#if 0
32static char sccsid[] = "@(#)vfslist.c	8.1 (Berkeley) 5/8/95";
33#endif
34#endif /* not lint */
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/sbin/mount/vfslist.c 128073 2004-04-09 19:58:40Z markm $");
37
38#include <err.h>
39#include <stdlib.h>
40#include <string.h>
41
42#include "extern.h"
43
44static int	  skipvfs;
45
46int
47checkvfsname(vfsname, vfslist)
48	const char *vfsname;
49	const char **vfslist;
50{
51
52	if (vfslist == NULL)
53		return (0);
54	while (*vfslist != NULL) {
55		if (strcmp(vfsname, *vfslist) == 0)
56			return (skipvfs);
57		++vfslist;
58	}
59	return (!skipvfs);
60}
61
62const char **
63makevfslist(fslist)
64	char *fslist;
65{
66	const char **av;
67	int i;
68	char *nextcp;
69
70	if (fslist == NULL)
71		return (NULL);
72	if (fslist[0] == 'n' && fslist[1] == 'o') {
73		fslist += 2;
74		skipvfs = 1;
75	}
76	for (i = 0, nextcp = fslist; *nextcp; nextcp++)
77		if (*nextcp == ',')
78			i++;
79	if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
80		warnx("malloc failed");
81		return (NULL);
82	}
83	nextcp = fslist;
84	i = 0;
85	av[i++] = nextcp;
86	while ((nextcp = strchr(nextcp, ',')) != NULL) {
87		*nextcp++ = '\0';
88		av[i++] = nextcp;
89	}
90	av[i++] = NULL;
91	return (av);
92}
93