use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/minix1.c b/libblkid/minix1.c
new file mode 100644
index 0000000..54e7139
--- /dev/null
+++ b/libblkid/minix1.c
@@ -0,0 +1,94 @@
+/*
+ * 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 <string.h>
+#include "superblocks.h"
+#include "minix.h"
+
+static int probe_minix(blkid_probe pr, const struct blkid_idmag *mag)
+{
+ unsigned char *ext;
+ int version;
+
+ /* for more details see magic strings below */
+ switch(mag->magic[1]) {
+ case '\023':
+ version = 1;
+ break;
+ case '\044':
+ version = 2;
+ break;
+ case '\115':
+ version = 3;
+ break;
+ default:
+ return -1;
+ break;
+ }
+
+ if (version <= 2) {
+ struct minix_super_block *sb;
+ uint32_t zones;
+
+ sb = blkid_probe_get_sb(pr, mag, struct minix_super_block);
+ if (!sb || sb->s_imap_blocks == 0 || sb->s_zmap_blocks == 0)
+ return -1;
+
+ zones = version == 2 ? sb->s_zones : sb->s_nzones;
+
+ /* sanity checks to be sure that the FS is really minix */
+ if (sb->s_imap_blocks * MINIX_BLOCK_SIZE * 8 < sb->s_ninodes + 1)
+ return -1;
+ if (sb->s_zmap_blocks * MINIX_BLOCK_SIZE * 8 < zones - sb->s_firstdatazone + 1)
+ return -1;
+
+ } else if (version == 3) {
+ struct minix3_super_block *sb;
+
+ sb = blkid_probe_get_sb(pr, mag, struct minix3_super_block);
+ if (!sb || sb->s_imap_blocks == 0 || sb->s_zmap_blocks == 0)
+ return -1;
+
+ }
+
+ /* unfortunately, some parts of ext3 is sometimes possible to
+ * interpreted as minix superblock. So check for extN magic
+ * string. (For extN magic string and offsets see ext.c.)
+ */
+ ext = blkid_probe_get_buffer(pr, 0x400 + 0x38, 2);
+ if (ext && memcmp(ext, "\123\357", 2) == 0)
+ return -1;
+
+ blkid_probe_sprintf_version(pr, "%d", version);
+ return 0;
+}
+
+const struct blkid_idinfo minix_idinfo =
+{
+ .name = "minix",
+ .usage = BLKID_USAGE_FILESYSTEM,
+ .probefunc = probe_minix,
+ .magics =
+ {
+ /* version 1 */
+ { .magic = "\177\023", .len = 2, .kboff = 1, .sboff = 0x10 },
+ { .magic = "\217\023", .len = 2, .kboff = 1, .sboff = 0x10 },
+
+ /* version 2 */
+ { .magic = "\150\044", .len = 2, .kboff = 1, .sboff = 0x10 },
+ { .magic = "\170\044", .len = 2, .kboff = 1, .sboff = 0x10 },
+
+ /* version 3 */
+ { .magic = "\132\115", .len = 2, .kboff = 1, .sboff = 0x18 },
+ { NULL }
+ }
+};
+