Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/unused_mac.c
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 3809 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* |
2 | * volume_id - reads filesystem label and uuid |
3 | * |
4 | * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> |
5 | * |
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. |
10 | * |
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. |
15 | * |
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 |
19 | */ |
20 | |
21 | #include "volume_id_internal.h" |
22 | |
23 | struct mac_driver_desc { |
24 | uint8_t signature[2]; |
25 | uint16_t block_size; |
26 | uint32_t block_count; |
27 | } PACKED; |
28 | |
29 | struct mac_partition { |
30 | uint8_t signature[2]; |
31 | uint16_t res1; |
32 | uint32_t map_count; |
33 | uint32_t start_block; |
34 | uint32_t block_count; |
35 | uint8_t name[32]; |
36 | uint8_t type[32]; |
37 | } PACKED; |
38 | |
39 | int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id, uint64_t off) |
40 | { |
41 | const uint8_t *buf; |
42 | struct mac_driver_desc *driver; |
43 | struct mac_partition *part; |
44 | |
45 | dbg("probing at offset 0x%llx", (unsigned long long) off); |
46 | |
47 | buf = volume_id_get_buffer(id, off, 0x200); |
48 | if (buf == NULL) |
49 | return -1; |
50 | |
51 | part = (struct mac_partition *) buf; |
52 | if (part->signature[0] == 'P' && part->signature[1] == 'M' /* "PM" */ |
53 | && (memcmp(part->type, "Apple_partition_map", 19) == 0) |
54 | ) { |
55 | /* linux creates an own subdevice for the map |
56 | * just return the type if the drive header is missing */ |
57 | // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE); |
58 | // id->type = "mac_partition_map"; |
59 | return 0; |
60 | } |
61 | |
62 | driver = (struct mac_driver_desc *) buf; |
63 | if (driver->signature[0] == 'E' && driver->signature[1] == 'R') { /* "ER" */ |
64 | /* we are on a main device, like a CD |
65 | * just try to probe the first partition from the map */ |
66 | unsigned bsize = be16_to_cpu(driver->block_size); |
67 | int part_count; |
68 | int i; |
69 | |
70 | /* get first entry of partition table */ |
71 | buf = volume_id_get_buffer(id, off + bsize, 0x200); |
72 | if (buf == NULL) |
73 | return -1; |
74 | |
75 | part = (struct mac_partition *) buf; |
76 | if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */ |
77 | return -1; |
78 | |
79 | part_count = be32_to_cpu(part->map_count); |
80 | dbg("expecting %d partition entries", part_count); |
81 | |
82 | if (id->partitions != NULL) |
83 | free(id->partitions); |
84 | id->partitions = xzalloc(part_count * sizeof(struct volume_id_partition)); |
85 | |
86 | id->partition_count = part_count; |
87 | |
88 | for (i = 0; i < part_count; i++) { |
89 | uint64_t poff; |
90 | uint64_t plen; |
91 | |
92 | buf = volume_id_get_buffer(id, off + ((i+1) * bsize), 0x200); |
93 | if (buf == NULL) |
94 | return -1; |
95 | |
96 | part = (struct mac_partition *) buf; |
97 | if (part->signature[0] != 'P' || part->signature[1] != 'M') /* not "PM" */ |
98 | return -1; |
99 | |
100 | poff = be32_to_cpu(part->start_block) * bsize; |
101 | plen = be32_to_cpu(part->block_count) * bsize; |
102 | dbg("found '%s' partition entry at 0x%llx, len 0x%llx", |
103 | part->type, (unsigned long long) poff, |
104 | (unsigned long long) plen); |
105 | |
106 | // id->partitions[i].pt_off = poff; |
107 | // id->partitions[i].pt_len = plen; |
108 | |
109 | // if (memcmp(part->type, "Apple_Free", 10) == 0) { |
110 | // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNUSED); |
111 | // } else if (memcmp(part->type, "Apple_partition_map", 19) == 0) { |
112 | // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_PARTITIONTABLE); |
113 | // } else { |
114 | // volume_id_set_usage_part(&id->partitions[i], VOLUME_ID_UNPROBED); |
115 | // } |
116 | } |
117 | // volume_id_set_usage(id, VOLUME_ID_PARTITIONTABLE); |
118 | // id->type = "mac_partition_map"; |
119 | return 0; |
120 | } |
121 | |
122 | return -1; |
123 | } |