Terminate local display on remote X11 server error

backend/wayland/backend.c

@@ -41,7 +41,7 @@ static bool wlr_wl_backend_start(struct wlr_backend *_backend) {
 	wlr_log(L_INFO, "Initializating wayland backend");
 
 	wlr_wl_registry_poll(backend);
-	if (!(backend->compositor) || (!(backend->shell))) {
+	if (!backend->compositor || !backend->shell) {
 		wlr_log_errno(L_ERROR, "Could not obtain retrieve required globals");
 		return false;
 	}
@@ -54,10 +54,9 @@ static bool wlr_wl_backend_start(struct wlr_backend *_backend) {
 
 	struct wl_event_loop *loop = wl_display_get_event_loop(backend->local_display);
 	int fd = wl_display_get_fd(backend->remote_display);
-	int events = WL_EVENT_READABLE | WL_EVENT_ERROR |
-		WL_EVENT_HANGUP;
+	int events = WL_EVENT_READABLE | WL_EVENT_ERROR | WL_EVENT_HANGUP;
 	backend->remote_display_src = wl_event_loop_add_fd(loop, fd, events,
-			dispatch_events, backend);
+		dispatch_events, backend);
 	wl_event_source_check(backend->remote_display_src);
 
 	return true;

backend/x11/backend.c

@@ -155,9 +155,14 @@ static bool handle_x11_event(struct wlr_x11_backend *x11, xcb_generic_event_t *e
 
 static int x11_event(int fd, uint32_t mask, void *data) {
 	struct wlr_x11_backend *x11 = data;
+
+	if ((mask & WL_EVENT_HANGUP) || (mask & WL_EVENT_ERROR)) {
+		wl_display_terminate(x11->wl_display);
+		return 0;
+	}
+
 	xcb_generic_event_t *e;
 	bool quit = false;
-
 	while (!quit && (e = xcb_poll_for_event(x11->xcb_conn))) {
 		quit = handle_x11_event(x11, e);
 		free(e);
@@ -205,7 +210,8 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
 
 	int fd = xcb_get_file_descriptor(x11->xcb_conn);
 	struct wl_event_loop *ev = wl_display_get_event_loop(display);
-	x11->event_source = wl_event_loop_add_fd(ev, fd, WL_EVENT_READABLE, x11_event, x11);
+	int events = WL_EVENT_READABLE | WL_EVENT_ERROR | WL_EVENT_HANGUP;
+	x11->event_source = wl_event_loop_add_fd(ev, fd, events, x11_event, x11);
 	if (!x11->event_source) {
 		wlr_log(L_ERROR, "Could not create event source");
 		goto error_x11;