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53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2006 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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#define SQUASHFS_MAGIC 0x73717368
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struct squashfs_super {
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uint32_t s_magic;
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} PACKED;
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int volume_id_probe_squashfs(struct volume_id *id, uint64_t off, uint64_t size)
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{
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struct squashfs_super *sqs;
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info("probing at offset 0x%llx", (unsigned long long) off);
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sqs = (struct squashfs_super *) volume_id_get_buffer(id, off + 0x200, 0x200);
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if (sqs == NULL)
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return -1;
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if (sqs->s_magic == SQUASHFS_MAGIC || sqs->s_magic == bswap_32(SQUASHFS_MAGIC)) {
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volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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id->type = "squashfs";
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return 0;
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}
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return -1;
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}
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