2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include "volume_id_internal.h"
23 #define ISO_SUPERBLOCK_OFFSET 0x8000
24 #define ISO_SECTOR_SIZE 0x800
25 #define ISO_VD_OFFSET (ISO_SUPERBLOCK_OFFSET + ISO_SECTOR_SIZE)
26 #define ISO_VD_PRIMARY 0x1
27 #define ISO_VD_SUPPLEMENTARY 0x2
28 #define ISO_VD_END 0xff
31 struct iso_volume_descriptor {
36 uint8_t system_id[32];
37 uint8_t volume_id[32];
39 uint8_t space_size[8];
40 uint8_t escape_sequences[8];
41 } __attribute__((__packed__));
43 struct high_sierra_volume_descriptor {
48 } __attribute__((__packed__));
50 int volume_id_probe_iso9660(struct volume_id *id /*,uint64_t off*/)
52 #define off ((uint64_t)0)
54 struct iso_volume_descriptor *is;
55 struct high_sierra_volume_descriptor *hs;
57 dbg("probing at offset 0x%llx", (unsigned long long) off);
59 buf = volume_id_get_buffer(id, off + ISO_SUPERBLOCK_OFFSET, 0x200);
63 is = (struct iso_volume_descriptor *) buf;
65 if (memcmp(is->vd_id, "CD001", 5) == 0) {
69 dbg("read label from PVD");
70 // volume_id_set_label_raw(id, is->volume_id, 32);
71 volume_id_set_label_string(id, is->volume_id, 32);
73 dbg("looking for SVDs");
74 vd_offset = ISO_VD_OFFSET;
75 for (i = 0; i < ISO_VD_MAX; i++) {
76 uint8_t svd_label[64];
78 is = volume_id_get_buffer(id, off + vd_offset, 0x200);
79 if (is == NULL || is->vd_type == ISO_VD_END)
81 if (is->vd_type != ISO_VD_SUPPLEMENTARY)
84 dbg("found SVD at offset 0x%llx", (unsigned long long) (off + vd_offset));
85 if (memcmp(is->escape_sequences, "%/@", 3) == 0
86 || memcmp(is->escape_sequences, "%/C", 3) == 0
87 || memcmp(is->escape_sequences, "%/E", 3) == 0
89 dbg("Joliet extension found");
90 volume_id_set_unicode16((char *)svd_label, sizeof(svd_label), is->volume_id, BE, 32);
91 if (memcmp(id->label, svd_label, 16) == 0) {
92 dbg("SVD label is identical, use the possibly longer PVD one");
96 // volume_id_set_label_raw(id, is->volume_id, 32);
97 volume_id_set_label_string(id, svd_label, 32);
98 // strcpy(id->type_version, "Joliet Extension");
101 vd_offset += ISO_SECTOR_SIZE;
106 hs = (struct high_sierra_volume_descriptor *) buf;
108 if (memcmp(hs->id, "CDROM", 5) == 0) {
109 // strcpy(id->type_version, "High Sierra");
116 // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
117 // id->type = "iso9660";