1/* 2 * volume_id - reads filesystem label and uuid 3 * 4 * Copyright (C) 2004 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 romfs_super { 30 uint8_t magic[8]; 31 uint32_t size; 32 uint32_t checksum; 33 uint8_t name[0]; 34} PACKED; 35 36int volume_id_probe_romfs(struct volume_id *id, uint64_t off, uint64_t size) 37{ 38 struct romfs_super *rfs; 39 40 info("probing at offset 0x%llx", (unsigned long long) off); 41 42 rfs = (struct romfs_super *) volume_id_get_buffer(id, off, 0x200); 43 if (rfs == NULL) 44 return -1; 45 46 if (memcmp(rfs->magic, "-rom1fs-", 4) == 0) { 47 size_t len = strlen((char *)rfs->name); 48 49 if (len) { 50 volume_id_set_label_raw(id, rfs->name, len); 51 volume_id_set_label_string(id, rfs->name, len); 52 } 53 54 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); 55 id->type = "romfs"; 56 return 0; 57 } 58 59 return -1; 60} 61