gistfile1.txt

struct {
		xcb_input_event_mask_t head;
		xcb_input_xi_event_mask_t mask;
	} mask;
	mask.head.deviceid = XCB_INPUT_DEVICE_ALL_MASTER;
	mask.mask = XCB_INPUT_XI_EVENT_MASK_RAW_BUTTON_PRESS |
			XCB_INPUT_XI_EVENT_MASK_RAW_BUTTON_RELEASE;
	mask.head.mask_len = sizeof(xcb_input_xi_event_mask_t);
	xcb_input_xi_select_events(connection, window, 1, &mask);

	xcb_flush(connection);