ENABLE_TRIGGER
This option is used to enable or disable triggers. There should be two additional arguments. The first argument is an integer which is 0 to disable triggers, positive to enable triggers or negative to leave the setting unchanged. The second parameter is a pointer to an integer into which is written 0 or 1 to indicate whether triggers are disabled or enabled following this call. The second parameter may be a NULL pointer, in which case the trigger setting is not reported back.