xref: /freebsd/sbin/mount/vfslist.c (revision 5773cccf19ef7b97e56c1101aa481c43149224da)
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  * 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.
20  *
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
31  * SUCH DAMAGE.
32  */
33 
34 #ifndef lint
35 #if 0
36 static char sccsid[] = "@(#)vfslist.c	8.1 (Berkeley) 5/8/95";
37 #endif
38 static const char rcsid[] =
39   "$FreeBSD$";
40 #endif /* not lint */
41 
42 #include <err.h>
43 #include <stdlib.h>
44 #include <string.h>
45 
46 #include "extern.h"
47 
48 static int	  skipvfs;
49 
50 int
51 checkvfsname(vfsname, vfslist)
52 	const char *vfsname;
53 	const char **vfslist;
54 {
55 
56 	if (vfslist == NULL)
57 		return (0);
58 	while (*vfslist != NULL) {
59 		if (strcmp(vfsname, *vfslist) == 0)
60 			return (skipvfs);
61 		++vfslist;
62 	}
63 	return (!skipvfs);
64 }
65 
66 const char **
67 makevfslist(fslist)
68 	char *fslist;
69 {
70 	const char **av;
71 	int i;
72 	char *nextcp;
73 
74 	if (fslist == NULL)
75 		return (NULL);
76 	if (fslist[0] == 'n' && fslist[1] == 'o') {
77 		fslist += 2;
78 		skipvfs = 1;
79 	}
80 	for (i = 0, nextcp = fslist; *nextcp; nextcp++)
81 		if (*nextcp == ',')
82 			i++;
83 	if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) {
84 		warnx("malloc failed");
85 		return (NULL);
86 	}
87 	nextcp = fslist;
88 	i = 0;
89 	av[i++] = nextcp;
90 	while ((nextcp = strchr(nextcp, ',')) != NULL) {
91 		*nextcp++ = '\0';
92 		av[i++] = nextcp;
93 	}
94 	av[i++] = NULL;
95 	return (av);
96 }
97