use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/luks.c b/libblkid/luks.c
new file mode 100644
index 0000000..f716e31
--- /dev/null
+++ b/libblkid/luks.c
@@ -0,0 +1,66 @@
+/*
+ * 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 <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include "superblocks.h"
+
+#define LUKS_CIPHERNAME_L 32
+#define LUKS_CIPHERMODE_L 32
+#define LUKS_HASHSPEC_L 32
+#define LUKS_DIGESTSIZE 20
+#define LUKS_SALTSIZE 32
+#define LUKS_MAGIC_L 6
+#define UUID_STRING_L 40
+
+struct luks_phdr {
+ uint8_t magic[LUKS_MAGIC_L];
+ uint16_t version;
+ uint8_t cipherName[LUKS_CIPHERNAME_L];
+ uint8_t cipherMode[LUKS_CIPHERMODE_L];
+ uint8_t hashSpec[LUKS_HASHSPEC_L];
+ uint32_t payloadOffset;
+ uint32_t keyBytes;
+ uint8_t mkDigest[LUKS_DIGESTSIZE];
+ uint8_t mkDigestSalt[LUKS_SALTSIZE];
+ uint32_t mkDigestIterations;
+ uint8_t uuid[UUID_STRING_L];
+} __attribute__((packed));
+
+static int probe_luks(blkid_probe pr, const struct blkid_idmag *mag)
+{
+ struct luks_phdr *header;
+
+ header = blkid_probe_get_sb(pr, mag, struct luks_phdr);
+ if (header == NULL)
+ return -1;
+
+ blkid_probe_strncpy_uuid(pr, (unsigned char *) header->uuid,
+ sizeof(header->uuid));
+ blkid_probe_sprintf_version(pr, "%u", be16_to_cpu(header->version));
+ return 0;
+}
+
+const struct blkid_idinfo luks_idinfo =
+{
+ .name = "crypto_LUKS",
+ .usage = BLKID_USAGE_CRYPTO,
+ .probefunc = probe_luks,
+ .magics =
+ {
+ { .magic = "LUKS\xba\xbe", .len = 6 },
+ { NULL }
+ }
+};