xwayland: fix some shutdown cases

xwayland/sockets.c

@@ -24,7 +24,9 @@ static int open_socket(struct sockaddr_un *addr, size_t path_size) {
 
 	fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
 	if (fd < 0) {
-		wlr_log_errno(L_ERROR, "Failed to create socket %s", addr->sun_path);
+		wlr_log_errno(L_DEBUG, "Failed to create socket %c%s",
+			addr->sun_path[0] ? addr->sun_path[0] : '@',
+			addr->sun_path + 1);
 		return -1;
 	}
 
@@ -33,12 +35,16 @@ static int open_socket(struct sockaddr_un *addr, size_t path_size) {
 	}
 	if (bind(fd, (struct sockaddr*)addr, size) < 0) {
 		rc = errno;
-		wlr_log_errno(L_ERROR, "Failed to bind socket %s", addr->sun_path);
+		wlr_log_errno(L_DEBUG, "Failed to bind socket %c%s",
+			addr->sun_path[0] ? addr->sun_path[0] : '@',
+			addr->sun_path + 1);
 		goto cleanup;
 	}
 	if (listen(fd, 1) < 0) {
 		rc = errno;
-		wlr_log_errno(L_ERROR, "Failed to listen to socket %s", addr->sun_path);
+		wlr_log_errno(L_DEBUG, "Failed to listen to socket %c%s",
+			addr->sun_path[0] ? addr->sun_path[0] : '@',
+			addr->sun_path + 1);
 		goto cleanup;
 	}
 

xwayland/xwayland.c

@@ -6,6 +6,8 @@
 #include <fcntl.h>
 #include <signal.h>
 #include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/wait.h>
 #include <time.h>
 #include <stdlib.h>
 #include <errno.h>
@@ -93,9 +95,9 @@ static void exec_xwayland(struct wlr_xwayland *wlr_xwayland) {
 	snprintf(wayland_socket_str, sizeof(wayland_socket_str), "%d", wlr_xwayland->wl_fd[1]);
 	setenv("WAYLAND_SOCKET", wayland_socket_str, true);
 
-	wlr_log(L_INFO, "Xwayland :%d -rootless -terminate -listen %d -listen %d -wm %d",
-			wlr_xwayland->display, wlr_xwayland->x_fd[0], wlr_xwayland->x_fd[1],
-			wlr_xwayland->wm_fd[1]);
+	wlr_log(L_INFO, "WAYLAND_SOCKET=%d Xwayland :%d -rootless -terminate -listen %d -listen %d -wm %d",
+		wlr_xwayland->wl_fd[1], wlr_xwayland->display, wlr_xwayland->x_fd[0],
+		wlr_xwayland->x_fd[1], wlr_xwayland->wm_fd[1]);
 
 	// TODO: close stdout/err depending on log level
 
@@ -111,20 +113,23 @@ static void xwayland_destroy_event(struct wl_listener *listener, void *data) {
 
 	/* don't call client destroy */
 	wlr_xwayland->client = NULL;
+	wl_list_remove(&wlr_xwayland->destroy_listener.link);
 	wlr_xwayland_finish(wlr_xwayland);
 
-	if (wlr_xwayland->server_start - time(NULL) > 5) {
+	if (time(NULL) - wlr_xwayland->server_start > 5) {
 		wlr_xwayland_init(wlr_xwayland, wlr_xwayland->wl_display,
-				wlr_xwayland->compositor);
+			wlr_xwayland->compositor);
 	}
 }
 
 static void wlr_xwayland_finish(struct wlr_xwayland *wlr_xwayland) {
+	if (!wlr_xwayland || wlr_xwayland->display == -1) {
+		return;
+	}
 	if (wlr_xwayland->client) {
 		wl_list_remove(&wlr_xwayland->destroy_listener.link);
 		wl_client_destroy(wlr_xwayland->client);
 	}
-
 	if (wlr_xwayland->sigusr1_source) {
 		wl_event_source_remove(wlr_xwayland->sigusr1_source);
 	}
@@ -142,10 +147,13 @@ static void wlr_xwayland_finish(struct wlr_xwayland *wlr_xwayland) {
 	safe_close(wlr_xwayland->wm_fd[1]);
 
 	unlink_display_sockets(wlr_xwayland->display);
+	wlr_xwayland->display = -1;
 	unsetenv("DISPLAY");
-	/* We do not kill the Xwayland process, it dies because of broken pipe
-	 * after we close our side of the wm/wl fds. This is more reliable than
-	 * trying to kill something that might no longer be Xwayland */
+	/* We do not kill the Xwayland process, it dies to broken pipe
+	 * after we close our side of the wm/wl fds. This is more reliable
+	 * than trying to kill something that might no longer be Xwayland.
+	 */
+	// TODO: figure how to wait for dying process though. Probably handle SIGCHILD
 }
 
 static int xserver_handle_ready(int signal_number, void *data) {

xwayland/xwm.c

@@ -61,7 +61,7 @@ static bool xcb_call(struct wlr_xwm *xwm, const char *func, uint32_t line,
 	}
 
 	wlr_log(L_ERROR, "xcb call failed in %s:%u, x11 error code %d",
-			func, line, error->error_code);
+		func, line, error->error_code);
 	free(error);
 	return false;
 }
@@ -79,7 +79,7 @@ static void map_shell_surface(struct wlr_xwm *xwm, struct wlr_x11_window *window
 static void handle_create_notify(struct wlr_xwm *xwm, xcb_create_notify_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_CREATE_NOTIFY (%u)", ev->window);
 	wlr_x11_window_create(xwm, ev->window, ev->x, ev->y,
-			ev->width, ev->height, ev->override_redirect);
+		ev->width, ev->height, ev->override_redirect);
 }
 
 static void handle_destroy_notify(struct wlr_xwm *xwm, xcb_destroy_notify_event_t *ev) {
@@ -94,7 +94,7 @@ static void handle_destroy_notify(struct wlr_xwm *xwm, xcb_destroy_notify_event_
 static void handle_configure_request(struct wlr_xwm *xwm, xcb_configure_request_event_t *ev) {
 	struct wlr_x11_window *window;
 	wlr_log(L_DEBUG, "XCB_CONFIGURE_REQUEST (%u) [%ux%u+%d,%d]", ev->window,
-			ev->width, ev->height, ev->x, ev->y);
+		ev->width, ev->height, ev->x, ev->y);
 	if (!(window = lookup_window_any(xwm, ev->window))) {
 		return;
 	}
@@ -154,7 +154,7 @@ static void handle_client_message(struct wlr_xwm *xwm, xcb_client_message_event_
 		window = lookup_window(&xwm->new_windows, ev->window);
 		if (!window) {
 			wlr_log(L_DEBUG, "client message WL_SURFACE_ID but no new window %u ?",
-					ev->window);
+				ev->window);
 			return;
 		}
 		window->surface_id = ev->data.data32[0];
@@ -260,7 +260,7 @@ static void xcb_get_resources(struct wlr_xwm *xwm) {
 		}
 		if (error) {
 			wlr_log(L_ERROR, "could not resolve atom %s, x11 error code %d",
-					atom_map[i], error->error_code);
+				atom_map[i], error->error_code);
 			free(error);
 			return;
 		}
@@ -304,10 +304,13 @@ static void xcb_init_wm(struct wlr_xwm *xwm) {
 }
 
 void xwm_destroy(struct wlr_xwm *xwm) {
+	if (!xwm) {
+		return;
+	}
 	if (xwm->event_source) {
 		wl_event_source_remove(xwm->event_source);
 	}
-
+	wl_list_remove(&xwm->surface_create_listener.link);
 	xcb_disconnect(xwm->xcb_conn);
 
 	free(xwm);