test: Pretty print the error when trying to set/unset VPN property

diff --git a/test/vpn-property b/test/vpn-property
index 2bafa1a..d05f4c7 100755 (executable)
--- a/test/vpn-property
+++ b/test/vpn-property
@@ -61,6 +61,12 @@ if (argc < 3):
                print "    %s = %s" % (key, val)
 
 elif (argc < 4):
-       connection.ClearProperty(sys.argv[2])
+       try:
+               connection.ClearProperty(sys.argv[2])
+       except dbus.DBusException, error:
+               print "%s: %s" % (error._dbus_error_name, error.message)
 else:
-       connection.SetProperty(sys.argv[2], sys.argv[3])
+       try:
+               connection.SetProperty(sys.argv[2], sys.argv[3])
+       except dbus.DBusException, error:
+               print "%s: %s" % (error._dbus_error_name, error.message)