--- xdg-su.orig	2012-12-05 20:04:08.040808857 +0100
+++ xdg-su	2012-12-05 20:48:32.384821375 +0100
@@ -425,6 +431,12 @@ if [ -z "${cmd}" ] ; then
     exit_failure_syntax "command missing"
 fi
 
+display_user="$user"
+[ x"$display_user" = x"" ] && display_user=root 
+if [ x`whoami` = x"$display_user" ] ; then
+    exec sh -c "$cmd"
+fi
+
 detectDE
 
 if [ x"$DE" = x"" ]; then
@@ -456,7 +468,6 @@ case "$DE" in
     ;;
 
     *)
-    [ x"$user" = x"" ] && user=root 
-    exit_failure_operation_impossible "no graphical method available for invoking '$cmd' as '$user'"
+    exit_failure_operation_impossible "no graphical method available for invoking '$cmd' as '$display_user'"
     ;;
 esac