use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/promise_raid.c b/libblkid/promise_raid.c
new file mode 100644
index 0000000..01e4e37
--- /dev/null
+++ b/libblkid/promise_raid.c
@@ -0,0 +1,71 @@
+/*
+ * 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"
+
+struct promise_metadata {
+ uint8_t sig[24];
+};
+
+#define PDC_CONFIG_OFF 0x1200
+#define PDC_SIGNATURE "Promise Technology, Inc."
+
+static int probe_pdcraid(blkid_probe pr,
+ const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+ unsigned int i;
+ static unsigned int sectors[] = {
+ 63, 255, 256, 16, 399, 591, 675, 735, 911, 974, 991, 951, 3087, 0
+ };
+
+ if (pr->size < 0x40000)
+ return -1;
+ if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
+ return -1;
+
+ for (i = 0; sectors[i] != 0; i++) {
+ uint64_t off;
+ struct promise_metadata *pdc;
+
+ off = ((pr->size / 0x200) - sectors[i]) * 0x200;
+ pdc = (struct promise_metadata *)
+ blkid_probe_get_buffer(pr,
+ off,
+ sizeof(struct promise_metadata));
+ if (!pdc)
+ return -1;
+
+ if (memcmp(pdc->sig, PDC_SIGNATURE,
+ sizeof(PDC_SIGNATURE) - 1) == 0) {
+
+ if (blkid_probe_set_magic(pr, off, sizeof(pdc->sig),
+ (unsigned char *) pdc->sig))
+ return -1;
+ return 0;
+ }
+ }
+ return -1;
+}
+
+const struct blkid_idinfo pdcraid_idinfo = {
+ .name = "promise_fasttrack_raid_member",
+ .usage = BLKID_USAGE_RAID,
+ .probefunc = probe_pdcraid,
+ .magics = BLKID_NONE_MAGIC
+};
+
+