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volume_id: hpfs - read label and uuid
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parent
13ddea8154
commit
842dacb76f
@ -31,31 +31,84 @@
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#include "libvolume_id.h"
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#include "libvolume_id-private.h"
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struct hpfs_boot_block
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{
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uint8_t jmp[3];
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uint8_t oem_id[8];
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uint8_t bytes_per_sector[2];
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uint8_t sectors_per_cluster;
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uint8_t n_reserved_sectors[2];
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uint8_t n_fats;
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uint8_t n_rootdir_entries[2];
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uint8_t n_sectors_s[2];
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uint8_t media_byte;
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uint16_t sectors_per_fat;
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uint16_t sectors_per_track;
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uint16_t heads_per_cyl;
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uint32_t n_hidden_sectors;
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uint32_t n_sectors_l;
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uint8_t drive_number;
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uint8_t mbz;
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uint8_t sig_28h;
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uint8_t vol_serno[4];
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uint8_t vol_label[11];
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uint8_t sig_hpfs[8];
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uint8_t pad[448];
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uint8_t magic[2];
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} PACKED;
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struct hpfs_super
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{
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uint8_t magic[4];
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uint8_t magic1[4];
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uint8_t version;
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} PACKED;
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struct hpfs_spare_super
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{
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uint8_t magic[4];
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uint8_t magic1[4];
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} PACKED;
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#define HPFS_SUPERBLOCK_OFFSET 0x2000
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#define HPFS_SUPERBLOCK_SPARE_OFFSET 0x2200
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int volume_id_probe_hpfs(struct volume_id *id, uint64_t off, uint64_t size)
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{
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struct hpfs_super *hs;
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struct hpfs_spare_super *hss;
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struct hpfs_boot_block *hbb;
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info("probing at offset 0x%llx\n", (unsigned long long) off);
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hs = (struct hpfs_super *) volume_id_get_buffer(id, off + HPFS_SUPERBLOCK_OFFSET, 0x200);
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hs = (struct hpfs_super *) volume_id_get_buffer(id, off + HPFS_SUPERBLOCK_OFFSET, 0x400);
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if (hs == NULL)
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return -1;
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if (memcmp(hs->magic, "\x49\xe8\x95\xf9", 4) != 0)
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return -1;
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if (memcmp(hs->magic, "\x49\xe8\x95\xf9", 4) == 0) {
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sprintf(id->type_version, "%u", hs->version);
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hss = (struct hpfs_spare_super *) volume_id_get_buffer(id, off + HPFS_SUPERBLOCK_SPARE_OFFSET, 0x200);
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if (hss == NULL)
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return -1;
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if (memcmp(hss->magic, "\x49\x18\x91\xf9", 4) != 0)
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return -1;
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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id->type = "hpfs";
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return 0;
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sprintf(id->type_version, "%u", hs->version);
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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id->type = "hpfs";
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/* if boot block looks valid, read label and uuid from there */
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hbb = (struct hpfs_boot_block *) volume_id_get_buffer(id, off, 0x200);
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if (hs == NULL)
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return -1;
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if (memcmp(hbb->magic, "\x55\xaa", 2) == 0 &&
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memcmp(hbb->sig_hpfs, "HPFS", 4) == 0 &&
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hbb->sig_28h == 0x28) {
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volume_id_set_label_raw(id, hbb->vol_label, 11);
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volume_id_set_label_string(id, hbb->vol_label, 11);
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volume_id_set_uuid(id, hbb->vol_serno, 0, UUID_DOS);
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}
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return -1;
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return 0;
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}
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