use libblkid to get filesystem type
we can now use libblkid to detect exfat
diff --git a/libblkid/procutils.h b/libblkid/procutils.h
new file mode 100644
index 0000000..ca7087a
--- /dev/null
+++ b/libblkid/procutils.h
@@ -0,0 +1,14 @@
+#ifndef UTIL_LINUX_PROCUTILS
+#define UTIL_LINUX_PROCUTILS
+
+#include <dirent.h>
+
+struct proc_tasks {
+	DIR *dir;
+};
+
+extern struct proc_tasks *proc_open_tasks(pid_t pid);
+extern void proc_close_tasks(struct proc_tasks *tasks);
+extern int proc_next_tid(struct proc_tasks *tasks, pid_t *tid);
+
+#endif /* UTIL_LINUX_PROCUTILS */