1 files changed, 103 insertions, 0 deletions
diff --git a/libblkid/src/superblocks/squashfs.c b/libblkid/src/superblocks/squashfs.c
new file mode 100644
index 0000000..4db8424
--- /dev/null
+++ b/libblkid/src/superblocks/squashfs.c
@@ -0,0 +1,103 @@
+/*
+ * 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;
+	uint16_t vermaj;
+	uint16_t vermin;
+
+	sq = blkid_probe_get_sb(pr, mag, struct sqsh_super_block);
+	if (!sq)
+		return errno ? -errno : 1;
+
+	vermaj = le16_to_cpu(sq->s_major);
+	vermin = le16_to_cpu(sq->s_minor);
+	if (vermaj < 4)
+		return 1;
+
+	blkid_probe_sprintf_version(pr, "%u.%u", vermaj, vermin);
+
+	return 0;
+}
+
+static int probe_squashfs3(blkid_probe pr, const struct blkid_idmag *mag)
+{
+	struct sqsh_super_block *sq;
+	uint16_t vermaj;
+	uint16_t vermin;
+
+	sq = blkid_probe_get_sb(pr, mag, struct sqsh_super_block);
+	if (!sq)
+		return errno ? -errno : 1;
+
+	if (strcmp(mag->magic, "sqsh") == 0) {
+		vermaj = be16_to_cpu(sq->s_major);
+		vermin = be16_to_cpu(sq->s_minor);
+	} else {
+		vermaj = le16_to_cpu(sq->s_major);
+		vermin = le16_to_cpu(sq->s_minor);
+	}
+
+	if (vermaj > 3)
+		return 1;
+
+	blkid_probe_sprintf_version(pr, "%u.%u", vermaj, vermin);
+
+	blkid_probe_set_block_size(pr, 1024);
+
+	return 0;
+}
+
+const struct blkid_idinfo squashfs_idinfo =
+{
+	.name		= "squashfs",
+	.usage		= BLKID_USAGE_FILESYSTEM,
+	.probefunc	= probe_squashfs,
+	.magics		=
+	{
+		{ .magic = "hsqs", .len = 4 },
+		{ NULL }
+	}
+};
+
+const struct blkid_idinfo squashfs3_idinfo =
+{
+	.name		= "squashfs3",
+	.usage		= BLKID_USAGE_FILESYSTEM,
+	.probefunc	= probe_squashfs3,
+	.magics		=
+	{
+		{ .magic = "sqsh", .len = 4 }, /* big endian */
+		{ .magic = "hsqs", .len = 4 }, /* little endian */
+		{ NULL }
+	}
+};
+