--- vlock-1.3/vlock.pamd.system-auth	1999-01-14 08:19:14.000000000 +0800
+++ vlock-1.3/vlock.pamd	2004-01-16 14:33:30.964111848 +0800
@@ -1,2 +1,3 @@
 #%PAM-1.0
-auth       required	/lib/security/pam_pwdb.so shadow nullok
+auth       include 	system-auth
+account    required	pam_permit.so