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 Ákos Kovács <akoskovacs@gmx.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/isofs/cd9660/iso.h>
38
39 static char buffer[ISO_DEFAULT_BLOCK_SIZE];
40
41 fsid_t
cd9660_probe(const char * dev)42 cd9660_probe(const char *dev)
43 {
44 struct iso_primary_descriptor *pdsc;
45
46 if (fsid_dev_read(dev, 32768L, sizeof(buffer), buffer) != 0)
47 return FSID_UNKNOWN;
48
49 pdsc = (struct iso_primary_descriptor *)&buffer;
50
51 if ((strncmp(pdsc->id, ISO_STANDARD_ID, 4)) == 0)
52 return FSID_CD9660;
53
54 return FSID_UNKNOWN;
55 }
56
57 char *
cd9660_volname(const char * dev)58 cd9660_volname(const char *dev)
59 {
60 static struct iso_primary_descriptor *pdsc;
61
62 if (fsid_dev_read(dev, 32768L, sizeof(buffer), buffer) != 0)
63 return NULL;
64
65 pdsc = (struct iso_primary_descriptor *)&buffer;
66
67 if (strncmp(pdsc->id, ISO_STANDARD_ID, 4) != 0 ||
68 pdsc->volume_id[0] == '\0')
69 return NULL;
70
71 pdsc->volume_id[sizeof(pdsc->volume_id) - 1] = '\0';
72
73 return pdsc->volume_id;
74 }
75