1 /*
2 * Copyright (c) 2010 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Alex Hornung <ahornung@gmail.com>
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 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include "libfsid.h"
36
37 #include <vfs/ufs/ufs_types.h>
38 #include <vfs/ufs/fs.h>
39
40 static char buffer[MAXBSIZE];
41
42 fsid_t
ufs_probe(const char * dev)43 ufs_probe(const char *dev)
44 {
45 static struct fs *fs;
46
47 if(fsid_dev_read(dev, SBOFF, sizeof(buffer), buffer) != 0)
48 return FSID_UNKNOWN;
49
50 fs = (struct fs *)&buffer;
51
52 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
53 (unsigned)fs->fs_bsize < sizeof(struct fs)) {
54 return FSID_UNKNOWN;
55 }
56
57 return FSID_UFS;
58 }
59
60 char *
ufs_volname(const char * dev)61 ufs_volname(const char *dev)
62 {
63 static struct fs *fs;
64
65 if(fsid_dev_read(dev, SBOFF, sizeof(buffer), buffer) != 0)
66 return NULL;
67
68 fs = (struct fs *)&buffer;
69
70 if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
71 (unsigned)fs->fs_bsize < sizeof(struct fs) ||
72 fs->fs_volname[0] == '\0') {
73 return NULL;
74 }
75
76 fs->fs_volname[MAXVOLLEN - 1] = '\0';
77
78 return fs->fs_volname;
79 }
80
81