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