1 /*-
2 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
3 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/5.4/sys/geom/label/g_label_iso9660.c 131476 2004-07-02 19:40:36Z pjd $");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/malloc.h>
34
35 #include <geom/geom.h>
36 #include <geom/label/g_label.h>
37
38 #define G_LABEL_ISO9660_DIR "iso9660"
39
40 #define ISO9660_MAGIC "\x01" "CD001" "\x01\x00"
41 #define VOLUME_LEN 32
42
43
44 static void
45 g_label_iso9660_taste(struct g_consumer *cp, char *label, size_t size)
46 {
47 struct g_provider *pp;
48 char *sector, *volume;
49 int i, error;
50
51 g_topology_assert_not();
52 pp = cp->provider;
53 label[0] = '\0';
54
55 sector = (char *)g_read_data(cp, 0x8000, pp->sectorsize, &error);
56 if (sector == NULL || error != 0)
57 return;
58 if (bcmp(sector, ISO9660_MAGIC, sizeof(ISO9660_MAGIC) - 1) != 0) {
59 g_free(sector);
60 return;
61 }
62 G_LABEL_DEBUG(1, "ISO9660 file system detected on %s.", pp->name);
63 volume = sector + 0x28;
64 bzero(label, size);
65 strlcpy(label, volume, MIN(size, VOLUME_LEN));
66 g_free(sector);
67 for (i = size - 1; i > 0; i--) {
68 if (label[i] == '\0')
69 continue;
70 else if (label[i] == ' ')
71 label[i] = '\0';
72 else
73 break;
74 }
75 }
76
77 const struct g_label_desc g_label_iso9660 = {
78 .ld_taste = g_label_iso9660_taste,
79 .ld_dir = G_LABEL_ISO9660_DIR
80 };
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