diff options
Diffstat (limited to 'libblkid/squashfs.c')
| -rw-r--r-- | libblkid/squashfs.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libblkid/squashfs.c b/libblkid/squashfs.c new file mode 100644 index 000000000..45f102917 --- /dev/null +++ b/libblkid/squashfs.c @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2008 Karel Zak <kzak@redhat.com> + * + * Inspired by libvolume_id by + * Kay Sievers <kay.sievers@vrfy.org> + * + * This file may be redistributed under the terms of the + * GNU Lesser General Public License. + */ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <stdint.h> + +#include "bitops.h" /* swab16() */ +#include "superblocks.h" + +struct sqsh_super_block { + uint32_t s_magic; + uint32_t inodes; + uint32_t bytes_used_2; + uint32_t uid_start_2; + uint32_t guid_start_2; + uint32_t inode_table_start_2; + uint32_t directory_table_start_2; + uint16_t s_major; + uint16_t s_minor; +} __attribute__((packed)); + +static int probe_squashfs(blkid_probe pr, const struct blkid_idmag *mag) +{ + struct sqsh_super_block *sq; + + sq = blkid_probe_get_sb(pr, mag, struct sqsh_super_block); + if (!sq) + return -1; + + if (strcmp(mag->magic, "sqsh") == 0 || + strcmp(mag->magic, "qshs") == 0) + blkid_probe_sprintf_version(pr, "%u.%u", + sq->s_major, + sq->s_minor); + else + blkid_probe_sprintf_version(pr, "%u.%u", + swab16(sq->s_major), + swab16(sq->s_minor)); + return 0; +} + +const struct blkid_idinfo squashfs_idinfo = +{ + .name = "squashfs", + .usage = BLKID_USAGE_FILESYSTEM, + .probefunc = probe_squashfs, + .magics = + { + { .magic = "sqsh", .len = 4 }, + { .magic = "hsqs", .len = 4 }, /* swap */ + + /* LZMA version */ + { .magic = "qshs", .len = 4 }, + { .magic = "shsq", .len = 4 }, /* swap */ + { NULL } + } +}; + + |