mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-11-01 09:21:11 +03:00
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
|
|
* 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 "libvolume_id.h"
|
|
#include "libvolume_id-private.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;
|
|
} PACKED info;
|
|
uint8_t name[16];
|
|
} PACKED;
|
|
|
|
int volume_id_probe_cramfs(struct volume_id *id, uint64_t off, uint64_t size)
|
|
{
|
|
struct cramfs_super *cs;
|
|
|
|
info("probing at offset 0x%llx\n", (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 || memcmp(cs->magic, "\x28\xcd\x3d\x45", 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;
|
|
}
|