use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/xfs.c b/libblkid/xfs.c
new file mode 100644
index 0000000..1399fe1
--- /dev/null
+++ b/libblkid/xfs.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 1999 by Andries Brouwer
+ * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
+ * Copyright (C) 2001 by Andreas Dilger
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ *
+ * 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 xfs_super_block {
+ unsigned char xs_magic[4];
+ uint32_t xs_blocksize;
+ uint64_t xs_dblocks;
+ uint64_t xs_rblocks;
+ uint32_t xs_dummy1[2];
+ unsigned char xs_uuid[16];
+ uint32_t xs_dummy2[15];
+ char xs_fname[12];
+ uint32_t xs_dummy3[2];
+ uint64_t xs_icount;
+ uint64_t xs_ifree;
+ uint64_t xs_fdblocks;
+} __attribute__((packed));
+
+static int probe_xfs(blkid_probe pr, const struct blkid_idmag *mag)
+{
+ struct xfs_super_block *xs;
+
+ xs = blkid_probe_get_sb(pr, mag, struct xfs_super_block);
+ if (!xs)
+ return -1;
+
+ if (strlen(xs->xs_fname))
+ blkid_probe_set_label(pr, (unsigned char *) xs->xs_fname,
+ sizeof(xs->xs_fname));
+ blkid_probe_set_uuid(pr, xs->xs_uuid);
+ return 0;
+}
+
+const struct blkid_idinfo xfs_idinfo =
+{
+ .name = "xfs",
+ .usage = BLKID_USAGE_FILESYSTEM,
+ .probefunc = probe_xfs,
+ .magics =
+ {
+ { .magic = "XFSB", .len = 4 },
+ { NULL }
+ }
+};
+