use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/exitcodes.h b/libblkid/exitcodes.h
new file mode 100644
index 0000000..24ee123
--- /dev/null
+++ b/libblkid/exitcodes.h
@@ -0,0 +1,35 @@
+#ifndef UTIL_LINUX_EXITCODES_H
+#define UTIL_LINUX_EXITCODES_H
+/*
+ * BE CAREFUL
+ *
+ * These exit codes are part of the official interface for mount,
+ * fsck, mkfs, etc. wrappers.
+ */
+
+/* Exit codes used by mkfs-type programs */
+#define MKFS_EX_OK 0 /* No errors */
+#define MKFS_EX_ERROR 8 /* Operational error */
+#define MKFS_EX_USAGE 16 /* Usage or syntax error */
+
+/* Exit codes used by fsck-type programs */
+#define FSCK_EX_OK 0 /* No errors */
+#define FSCK_EX_NONDESTRUCT 1 /* File system errors corrected */
+#define FSCK_EX_REBOOT 2 /* System should be rebooted */
+#define FSCK_EX_DESTRUCT FSCK_EX_REBOOT /* Alias */
+#define FSCK_EX_UNCORRECTED 4 /* File system errors left uncorrected */
+#define FSCK_EX_ERROR 8 /* Operational error */
+#define FSCK_EX_USAGE 16 /* Usage or syntax error */
+#define FSCK_EX_LIBRARY 128 /* Shared library error */
+
+/* Exit codes used by mount-line programs */
+#define MOUNT_EX_SUCCESS 0 /* No errors */
+#define MOUNT_EX_USAGE 1 /* incorrect invocation or permission */
+#define MOUNT_EX_SYSERR 2 /* out of memory, cannot fork, ... */
+#define MOUNT_EX_SOFTWARE 4 /* internal mount bug or wrong version */
+#define MOUNT_EX_USER 8 /* user interrupt */
+#define MOUNT_EX_FILEIO 16 /* problems writing, locking, ... mtab/fstab */
+#define MOUNT_EX_FAIL 32 /* mount failure */
+#define MOUNT_EX_SOMEOK 64 /* some mount succeeded */
+
+#endif /* UTIL_LINUX_EXITCODES_H */