1/* 2 * volume_id - reads filesystem label and uuid 3 * 4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation version 2 of the License. 9 */ 10 11#ifndef _GNU_SOURCE 12#define _GNU_SOURCE 1 13#endif 14 15#ifdef HAVE_CONFIG_H 16# include <config.h> 17#endif 18 19#include <stdio.h> 20#include <stdlib.h> 21#include <unistd.h> 22#include <string.h> 23#include <errno.h> 24#include <ctype.h> 25 26#include "libvolume_id.h" 27#include "util.h" 28 29struct hpfs_super 30{ 31 uint8_t magic[4]; 32 uint8_t version; 33} PACKED; 34 35#define HPFS_SUPERBLOCK_OFFSET 0x2000 36 37int volume_id_probe_hpfs(struct volume_id *id, uint64_t off, uint64_t size) 38{ 39 struct hpfs_super *hs; 40 41 info("probing at offset 0x%llx", (unsigned long long) off); 42 43 hs = (struct hpfs_super *) volume_id_get_buffer(id, off + HPFS_SUPERBLOCK_OFFSET, 0x200); 44 if (hs == NULL) 45 return -1; 46 47 if (memcmp(hs->magic, "\x49\xe8\x95\xf9", 4) == 0) { 48 sprintf(id->type_version, "%u", hs->version); 49 50 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); 51 id->type = "hpfs"; 52 return 0; 53 } 54 55 return -1; 56} 57