Do nothing if PolicyKit is unavailable

api/ChangeLog

+2009-05-07  Bahadır Kandemir  <bahadir@pardus.org.tr>
+
+	* api: Do nothing if PolicyKit is unavailable
+
 2009-02-06  Bahadır Kandemir  <bahadir@pardus.org.tr>
 
 	* api: socket parameter for Link class to connect any other DBus servers

api/comar/__init__.py

@@ -131,7 +131,10 @@ class Call:
         if "DISPLAY" not in os.environ:
             raise Exception, "X session required to query PolKit"
         bus = dbus.SessionBus()
-        obj = bus.get_object("org.freedesktop.PolicyKit.AuthenticationAgent", "/")
+        try:
+            obj = bus.get_object("org.freedesktop.PolicyKit.AuthenticationAgent", "/")
+        except dbus.DBusException, exception:
+            return False
         iface = dbus.Interface(obj, "org.freedesktop.PolicyKit.AuthenticationAgent")
         try:
             return iface.ObtainAuthorization(action, 0, os.getpid(), timeout=2**16-1) == 1