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];
43 struct high_sierra_volume_descriptor
{
50 int FAST_FUNC
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 IF_FEATURE_BLKID_TYPE(id
->type
= "iso9660";)