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Viewing changes to libblkid/src/superblocks/squashfs.c

  • Committer: Package Import Robot
  • Author(s): LaMont Jones
  • Date: 2011-11-03 15:38:23 UTC
  • mto: (4.5.5 sid) (1.6.4)
  • mto: This revision was merged to the branch mainline in revision 85.
  • Revision ID: package-import@ubuntu.com-20111103153823-10sx16jprzxlhkqf
Import upstream version 2.20.1

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libblkid/src/superblocks/squashfs.c
 
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/*
 
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 * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
 
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 *
 
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 * Inspired by libvolume_id by
 
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 *     Kay Sievers <kay.sievers@vrfy.org>
 
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 *
 
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 * This file may be redistributed under the terms of the
 
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 * GNU Lesser General Public License.
 
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 */
 
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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 <stdint.h>
 
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#include "bitops.h"     /* swab16() */
 
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#include "superblocks.h"
 
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struct sqsh_super_block {
 
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        uint32_t        s_magic;
 
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        uint32_t        inodes;
 
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        uint32_t        bytes_used_2;
 
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        uint32_t        uid_start_2;
 
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        uint32_t        guid_start_2;
 
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        uint32_t        inode_table_start_2;
 
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        uint32_t        directory_table_start_2;
 
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        uint16_t        s_major;
 
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        uint16_t        s_minor;
 
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} __attribute__((packed));
 
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static int probe_squashfs(blkid_probe pr, const struct blkid_idmag *mag)
 
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{
 
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        struct sqsh_super_block *sq;
 
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        sq = blkid_probe_get_sb(pr, mag, struct sqsh_super_block);
 
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        if (!sq)
 
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                return -1;
 
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        if (strcmp(mag->magic, "sqsh") == 0 ||
 
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            strcmp(mag->magic, "qshs") == 0)
 
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                blkid_probe_sprintf_version(pr, "%u.%u",
 
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                                sq->s_major,
 
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                                sq->s_minor);
 
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        else
 
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                blkid_probe_sprintf_version(pr, "%u.%u",
 
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                                swab16(sq->s_major),
 
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                                swab16(sq->s_minor));
 
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        return 0;
 
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}
 
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const struct blkid_idinfo squashfs_idinfo =
 
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{
 
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        .name           = "squashfs",
 
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        .usage          = BLKID_USAGE_FILESYSTEM,
 
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        .probefunc      = probe_squashfs,
 
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        .magics         =
 
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        {
 
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                { .magic = "sqsh", .len = 4 },
 
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                { .magic = "hsqs", .len = 4 }, /* swap */
 
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                /* LZMA version */
 
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                { .magic = "qshs", .len = 4 },
 
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                { .magic = "shsq", .len = 4 }, /* swap */
 
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                { NULL }
 
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        }
 
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};
 
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