use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/pamfail.h b/libblkid/pamfail.h
new file mode 100644
index 0000000..e102df2
--- /dev/null
+++ b/libblkid/pamfail.h
@@ -0,0 +1,22 @@
+/*
+ * No copyright is claimed. This code is in the public domain; do with
+ * it what you wish.
+ *
+ * Written by Karel Zak <kzak@redhat.com>
+ */
+#ifndef UTIL_LINUX_PAMFAIL_H
+#include <security/pam_appl.h>
+#include <security/pam_misc.h>
+#include "c.h"
+
+static inline int
+pam_fail_check(pam_handle_t *pamh, int retcode)
+{
+ if (retcode == PAM_SUCCESS)
+ return 0;
+ warnx("%s", pam_strerror(pamh, retcode));
+ pam_end(pamh, retcode);
+ return 1;
+}
+
+#endif /* UTIL_LINUX_PAMFAIL_H */