| bigbiff bigbiff | e60683a | 2013-02-22 20:55:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 Karel Zak <kzak@redhat.com> |
| 3 | * |
| 4 | * Inspired by libvolume_id by |
| 5 | * Kay Sievers <kay.sievers@vrfy.org> |
| 6 | * |
| 7 | * This file may be redistributed under the terms of the |
| 8 | * GNU Lesser General Public License. |
| 9 | */ |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <unistd.h> |
| 13 | #include <string.h> |
| 14 | #include <stdint.h> |
| 15 | |
| 16 | #include "superblocks.h" |
| 17 | |
| 18 | struct hpfs_boot_block |
| 19 | { |
| 20 | uint8_t jmp[3]; |
| 21 | uint8_t oem_id[8]; |
| 22 | uint8_t bytes_per_sector[2]; |
| 23 | uint8_t sectors_per_cluster; |
| 24 | uint8_t n_reserved_sectors[2]; |
| 25 | uint8_t n_fats; |
| 26 | uint8_t n_rootdir_entries[2]; |
| 27 | uint8_t n_sectors_s[2]; |
| 28 | uint8_t media_byte; |
| 29 | uint16_t sectors_per_fat; |
| 30 | uint16_t sectors_per_track; |
| 31 | uint16_t heads_per_cyl; |
| 32 | uint32_t n_hidden_sectors; |
| 33 | uint32_t n_sectors_l; |
| 34 | uint8_t drive_number; |
| 35 | uint8_t mbz; |
| 36 | uint8_t sig_28h; |
| 37 | uint8_t vol_serno[4]; |
| 38 | uint8_t vol_label[11]; |
| 39 | uint8_t sig_hpfs[8]; |
| 40 | uint8_t pad[448]; |
| 41 | uint8_t magic[2]; |
| 42 | } __attribute__((packed)); |
| 43 | |
| 44 | struct hpfs_super_block |
| 45 | { |
| 46 | uint8_t magic[4]; |
| 47 | uint8_t magic1[4]; |
| 48 | uint8_t version; |
| 49 | } __attribute__((packed)); |
| 50 | |
| 51 | struct hpfs_spare_super |
| 52 | { |
| 53 | uint8_t magic[4]; |
| 54 | uint8_t magic1[4]; |
| 55 | } __attribute__((packed)); |
| 56 | |
| 57 | |
| 58 | #define HPFS_SB_OFFSET 0x2000 |
| 59 | #define HPFS_SBSPARE_OFFSET 0x2200 |
| 60 | |
| 61 | static int probe_hpfs(blkid_probe pr, const struct blkid_idmag *mag) |
| 62 | { |
| 63 | struct hpfs_super_block *hs; |
| 64 | struct hpfs_spare_super *hss; |
| 65 | struct hpfs_boot_block *hbb; |
| 66 | uint8_t version; |
| 67 | |
| 68 | /* super block */ |
| 69 | hs = blkid_probe_get_sb(pr, mag, struct hpfs_super_block); |
| 70 | if (!hs) |
| 71 | return -1; |
| 72 | version = hs->version; |
| 73 | |
| 74 | /* spare super block */ |
| 75 | hss = (struct hpfs_spare_super *) |
| 76 | blkid_probe_get_buffer(pr, |
| 77 | HPFS_SBSPARE_OFFSET, |
| 78 | sizeof(struct hpfs_spare_super)); |
| 79 | if (!hss) |
| 80 | return -1; |
| 81 | if (memcmp(hss->magic, "\x49\x18\x91\xf9", 4) != 0) |
| 82 | return -1; |
| 83 | |
| 84 | /* boot block (with UUID and LABEL) */ |
| 85 | hbb = (struct hpfs_boot_block *) |
| 86 | blkid_probe_get_buffer(pr, |
| 87 | 0, |
| 88 | sizeof(struct hpfs_boot_block)); |
| 89 | if (!hbb) |
| 90 | return -1; |
| 91 | if (memcmp(hbb->magic, "\x55\xaa", 2) == 0 && |
| 92 | memcmp(hbb->sig_hpfs, "HPFS", 4) == 0 && |
| 93 | hbb->sig_28h == 0x28) { |
| 94 | blkid_probe_set_label(pr, hbb->vol_label, sizeof(hbb->vol_label)); |
| 95 | blkid_probe_sprintf_uuid(pr, |
| 96 | hbb->vol_serno, sizeof(hbb->vol_serno), |
| 97 | "%02X%02X-%02X%02X", |
| 98 | hbb->vol_serno[3], hbb->vol_serno[2], |
| 99 | hbb->vol_serno[1], hbb->vol_serno[0]); |
| 100 | } |
| 101 | blkid_probe_sprintf_version(pr, "%u", version); |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | const struct blkid_idinfo hpfs_idinfo = |
| 107 | { |
| 108 | .name = "hpfs", |
| 109 | .usage = BLKID_USAGE_FILESYSTEM, |
| 110 | .probefunc = probe_hpfs, |
| 111 | .magics = |
| 112 | { |
| 113 | { |
| 114 | .magic = "\x49\xe8\x95\xf9", |
| 115 | .len = 4, |
| 116 | .kboff = (HPFS_SB_OFFSET >> 10) |
| 117 | }, |
| 118 | { NULL } |
| 119 | } |
| 120 | }; |
| 121 | |
| 122 | |