xref: /freebsd/sbin/mount/vfslist.c (revision 77c1fcec914bae1232762ca0b0462abd6957ff26)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1995
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #ifndef lint
33 #if 0
34 static char sccsid[] = "@(#)vfslist.c	8.1 (Berkeley) 5/8/95";
35 #endif
36 #endif /* not lint */
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39 
40 #include <err.h>
41 #include <stdlib.h>
42 #include <string.h>
43 
44 #include "extern.h"
45 
46 static int	  skipvfs;
47 
48 int
49 checkvfsname(const char *vfsname, 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 
62 const char **
63 makevfslist(char *fslist)
64 {
65 	const char **av;
66 	int i;
67 	char *nextcp;
68 
69 	if (fslist == NULL)
70 		return (NULL);
71 	if (fslist[0] == 'n' && fslist[1] == 'o') {
72 		fslist += 2;
73 		skipvfs = 1;
74 	}
75 	for (i = 0, nextcp = fslist; *nextcp; nextcp++)
76 		if (*nextcp == ',')
77 			i++;
78 	if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
79 		warnx("malloc failed");
80 		return (NULL);
81 	}
82 	nextcp = fslist;
83 	i = 0;
84 	av[i++] = nextcp;
85 	while ((nextcp = strchr(nextcp, ',')) != NULL) {
86 		*nextcp++ = '\0';
87 		av[i++] = nextcp;
88 	}
89 	av[i++] = NULL;
90 	return (av);
91 }
92