Handle out-of-fd situations gracefully for transaction and urgent timers

2 files changed, 16 insertions, 3 deletions

diff --git a/sway/desktop/transaction.c b/sway/desktop/transaction.c
index ccda1963..a9c9cb58 100644
--- a/sway/desktop/transaction.c
+++ b/sway/desktop/transaction.c
@@ -316,7 +316,14 @@ static void transaction_commit(struct sway_transaction *transaction) {
                 // Set up a timer which the views must respond within
                 transaction->timer = wl_event_loop_add_timer(server.wl_event_loop,
                                 handle_timeout, transaction);
-                wl_event_source_timer_update(transaction->timer, txn_timeout_ms);
+                if (transaction->timer) {
+                        wl_event_source_timer_update(transaction->timer, txn_timeout_ms);
+                } else {
+                        wlr_log(WLR_ERROR, "Unable to create transaction timer. "
+                                        "There might not be any available file descriptors. "
+                                        "Some imperfect frames might be rendered.");
+                        handle_timeout(transaction);
+                }
         }
 
         // The debug tree shows the pending/live tree. Here is a good place to
diff --git a/sway/input/seat.c b/sway/input/seat.c
index e7b6e0c5..ab07c03c 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -696,8 +696,14 @@ void seat_set_focus_warp(struct sway_seat *seat,
                                 config->urgent_timeout > 0) {
                         view->urgent_timer = wl_event_loop_add_timer(server.wl_event_loop,
                                         handle_urgent_timeout, view);
-                        wl_event_source_timer_update(view->urgent_timer,
-                                        config->urgent_timeout);
+                        if (view->urgent_timer) {
+                                wl_event_source_timer_update(view->urgent_timer,
+                                                config->urgent_timeout);
+                        } else {
+                                wlr_log(WLR_ERROR, "Unable to create urgency timer. "
+                                                "There might not be any available file descriptors.");
+                                handle_urgent_timeout(view);
+                        }
                 } else {
                         view_set_urgent(view, false);
                 }