bigbiffandDees Troy
7b4c7a681c
Break libblkid into 4 libraries: libblkid, libuuid, libutil-linux and libfdisk. This should help in later patch updates. Change-Id: I680d9a7feb031e5c29a603e9c58aff4b65826262
102 lines
2.0 KiB
C
102 lines
2.0 KiB
C
/*
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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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uint16_t major;
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uint16_t minor;
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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 errno ? -errno : 1;
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major = le16_to_cpu(sq->s_major);
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minor = le16_to_cpu(sq->s_minor);
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if (major < 4)
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return 1;
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blkid_probe_sprintf_version(pr, "%u.%u", major, minor);
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return 0;
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}
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static int probe_squashfs3(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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uint16_t major;
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uint16_t minor;
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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 errno ? -errno : 1;
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if (strcmp(mag->magic, "sqsh") == 0) {
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major = be16_to_cpu(sq->s_major);
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minor = be16_to_cpu(sq->s_minor);
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} else {
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major = le16_to_cpu(sq->s_major);
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minor = le16_to_cpu(sq->s_minor);
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}
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if (major > 3)
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return 1;
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blkid_probe_sprintf_version(pr, "%u.%u", major, 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 = "hsqs", .len = 4 },
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{ NULL }
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}
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};
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const struct blkid_idinfo squashfs3_idinfo =
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{
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.name = "squashfs3",
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.usage = BLKID_USAGE_FILESYSTEM,
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.probefunc = probe_squashfs3,
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.magics =
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{
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{ .magic = "sqsh", .len = 4 }, /* big endian */
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{ .magic = "hsqs", .len = 4 }, /* little endian */
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{ NULL }
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}
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};
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