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/*
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
*
* Inspired by libvolume_id by
* Kay Sievers <kay.sievers@vrfy.org>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include "superblocks.h"
struct hpfs_boot_block
{
uint8_t jmp[3];
uint8_t oem_id[8];
uint8_t bytes_per_sector[2];
uint8_t sectors_per_cluster;
uint8_t n_reserved_sectors[2];
uint8_t n_fats;
uint8_t n_rootdir_entries[2];
uint8_t n_sectors_s[2];
uint8_t media_byte;
uint16_t sectors_per_fat;
uint16_t sectors_per_track;
uint16_t heads_per_cyl;
uint32_t n_hidden_sectors;
uint32_t n_sectors_l;
uint8_t drive_number;
uint8_t mbz;
uint8_t sig_28h;
uint8_t vol_serno[4];
uint8_t vol_label[11];
uint8_t sig_hpfs[8];
uint8_t pad[448];
uint8_t magic[2];
} __attribute__((packed));
struct hpfs_super_block
{
uint8_t magic[4];
uint8_t magic1[4];
uint8_t version;
} __attribute__((packed));
struct hpfs_spare_super
{
uint8_t magic[4];
uint8_t magic1[4];
} __attribute__((packed));
#define HPFS_SB_OFFSET 0x2000
#define HPFS_SBSPARE_OFFSET 0x2200
static int probe_hpfs(blkid_probe pr, const struct blkid_idmag *mag)
{
struct hpfs_super_block *hs;
struct hpfs_spare_super *hss;
struct hpfs_boot_block *hbb;
uint8_t version;
/* super block */
hs = blkid_probe_get_sb(pr, mag, struct hpfs_super_block);
if (!hs)
return errno ? -errno : 1;
version = hs->version;
/* spare super block */
hss = (struct hpfs_spare_super *)
blkid_probe_get_buffer(pr,
HPFS_SBSPARE_OFFSET,
sizeof(struct hpfs_spare_super));
if (!hss)
return errno ? -errno : 1;
if (memcmp(hss->magic, "\x49\x18\x91\xf9", 4) != 0)
return 1;
/* boot block (with UUID and LABEL) */
hbb = (struct hpfs_boot_block *)
blkid_probe_get_buffer(pr,
0,
sizeof(struct hpfs_boot_block));
if (!hbb)
return errno ? -errno : 1;
if (memcmp(hbb->magic, "\x55\xaa", 2) == 0 &&
memcmp(hbb->sig_hpfs, "HPFS", 4) == 0 &&
hbb->sig_28h == 0x28) {
blkid_probe_set_label(pr, hbb->vol_label, sizeof(hbb->vol_label));
blkid_probe_sprintf_uuid(pr,
hbb->vol_serno, sizeof(hbb->vol_serno),
"%02X%02X-%02X%02X",
hbb->vol_serno[3], hbb->vol_serno[2],
hbb->vol_serno[1], hbb->vol_serno[0]);
}
blkid_probe_sprintf_version(pr, "%u", version);
return 0;
}
const struct blkid_idinfo hpfs_idinfo =
{
.name = "hpfs",
.usage = BLKID_USAGE_FILESYSTEM,
.probefunc = probe_hpfs,
.magics =
{
{
.magic = "\x49\xe8\x95\xf9",
.len = 4,
.kboff = (HPFS_SB_OFFSET >> 10)
},
{ NULL }
}
};
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