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/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "volume_id.h"
#include "logging.h"
#include "util.h"
struct cramfs_super {
uint8_t magic[4];
uint32_t size;
uint32_t flags;
uint32_t future;
uint8_t signature[16];
struct cramfs_info {
uint32_t crc;
uint32_t edition;
uint32_t blocks;
uint32_t files;
} __attribute__((__packed__)) info;
uint8_t name[16];
} __attribute__((__packed__));
int volume_id_probe_cramfs(struct volume_id *id, uint64_t off)
{
struct cramfs_super *cs;
dbg("probing at offset 0x%llx", (unsigned long long) off);
cs = (struct cramfs_super *) volume_id_get_buffer(id, off, 0x200);
if (cs == NULL)
return -1;
if (memcmp(cs->magic, "\x45\x3d\xcd\x28", 4) == 0) {
volume_id_set_label_raw(id, cs->name, 16);
volume_id_set_label_string(id, cs->name, 16);
volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
id->type = "cramfs";
return 0;
}
return -1;
}
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