diff options
Diffstat (limited to 'extras/volume_id/lib/squashfs.c')
-rw-r--r-- | extras/volume_id/lib/squashfs.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/extras/volume_id/lib/squashfs.c b/extras/volume_id/lib/squashfs.c new file mode 100644 index 0000000000..bdb1f16628 --- /dev/null +++ b/extras/volume_id/lib/squashfs.c @@ -0,0 +1,52 @@ +/* + * volume_id - reads filesystem label and uuid + * + * Copyright (C) 2006 Kay Sievers <kay.sievers@vrfy.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation version 2 of the License. + */ + +#ifndef _GNU_SOURCE +#define _GNU_SOURCE 1 +#endif + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <ctype.h> + +#include "libvolume_id.h" +#include "util.h" + +#define SQUASHFS_MAGIC 0x73717368 + +struct squashfs_super { + uint32_t s_magic; +} PACKED; + +int volume_id_probe_squashfs(struct volume_id *id, uint64_t off) +{ + struct squashfs_super *sqs; + + dbg("probing at offset 0x%llx", (unsigned long long) off); + + sqs = (struct squashfs_super *) volume_id_get_buffer(id, off + 0x200, 0x200); + if (sqs == NULL) + return -1; + + if (sqs->s_magic == SQUASHFS_MAGIC || sqs->s_magic == bswap_32(SQUASHFS_MAGIC)) { + volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); + id->type = "squashfs"; + return 0; + } + + return -1; +} |