1 /* $OpenBSD: filesys-os.c,v 1.13 2015/01/20 09:00:16 guenther Exp $ */
2
3 /*
4 * Copyright (c) 1983 Regents of the University of California.
5 * 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 #include <sys/types.h>
33 #include <sys/mount.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 #include "server.h"
38
39 /*
40 * OS specific file system routines
41 */
42
43 static struct statfs *mnt = NULL;
44 static int entries_left;
45
46 /*
47 * getfsstat() version of get mount info routines.
48 */
49 int
setmountent(void)50 setmountent(void)
51 {
52 long size;
53
54 size = getfsstat(NULL, 0, MNT_WAIT);
55 if (size == -1)
56 return (0);
57
58 free(mnt);
59 size *= sizeof(struct statfs);
60 mnt = xmalloc(size);
61
62 entries_left = getfsstat(mnt, size, MNT_WAIT);
63 if (entries_left == -1)
64 return (0);
65
66 return (1);
67 }
68
69 /*
70 * getfsstat() version of getmountent()
71 */
72 mntent_t *
getmountent(void)73 getmountent(void)
74 {
75 static mntent_t mntstruct;
76 static char remote_dev[HOST_NAME_MAX+1 + PATH_MAX + 1];
77
78 if (!entries_left)
79 return (NULL);
80
81 memset(&mntstruct, 0, sizeof(mntstruct));
82
83 if (mnt->f_flags & MNT_RDONLY)
84 mntstruct.me_flags |= MEFLAG_READONLY;
85
86 if (strcmp(mnt->f_fstypename, "nfs") == 0) {
87 strlcpy(remote_dev, mnt->f_mntfromname, sizeof(remote_dev));
88 mntstruct.me_path = remote_dev;
89 mntstruct.me_flags |= MEFLAG_NFS;
90 } else
91 mntstruct.me_path = mnt->f_mntonname;
92
93 mnt++;
94 entries_left--;
95
96 return (&mntstruct);
97 }
98
99 /*
100 * Done with iterations
101 */
102 void
endmountent(void)103 endmountent(void)
104 {
105 free(mnt);
106 mnt = NULL;
107 }
108
109 /*
110 * Make a new (copy) of a mntent structure.
111 */
112 mntent_t *
newmountent(const mntent_t * old)113 newmountent(const mntent_t *old)
114 {
115 mntent_t *new;
116
117 new = xmalloc(sizeof *new);
118 new->me_path = xstrdup(old->me_path);
119 new->me_flags = old->me_flags;
120
121 return (new);
122 }
123