Workaround if /etc/motd is missing

--- ostype.orig	1993-04-19 19:18:37.000000000 +0300
+++ ostype
@@ -6,6 +6,8 @@
 set os="UNKNOWN"
 if ( -f /etc/motd ) then
 	set os=`awk -f ostype.awk /etc/motd`
+else
+	set os=`uname -a | awk -f ostype.awk`
 endif
 if ($os == "") exit 1
 if ($os == "UNKNOWN") then