use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/wholedisk.h b/libblkid/wholedisk.h
new file mode 100644
index 0000000..251479e
--- /dev/null
+++ b/libblkid/wholedisk.h
@@ -0,0 +1,8 @@
+#ifndef WHOLEDISK_H
+#define WHOLEDISK_H
+
+extern int is_whole_disk(const char *name);
+extern int is_whole_disk_fd(int fd, const char *name);
+
+#endif /* WHOLEDISK_H */
+