--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lock.h	Fri Oct 19 14:06:22 2007 +0200
@@ -0,0 +1,8 @@
+#ifndef LOCK_H
+#define LOCK_H
+
+extern int lock_ex();
+extern int lock_un();
+extern int lock_exnb();
+
+#endif