swaylock: exit early if unable to inhibit input

This stops the program from going into a spinlock without exiting

1 files changed, 5 insertions, 0 deletions

diff --git a/swaylock/main.c b/swaylock/main.c
index f2bb5c3e..8ed8adf5 100644
--- a/swaylock/main.c
+++ b/swaylock/main.c
@@ -925,6 +925,11 @@ int main(int argc, char **argv) {
         }
 
         zwlr_input_inhibit_manager_v1_get_inhibitor(state.input_inhibit_manager);
+        if (wl_display_roundtrip(state.display) == -1) {
+                wlr_log(WLR_ERROR, "Exiting - failed to inhibit input:"
+                                " is another lockscreen already running?");
+                return 2;
+        }
 
         if (state.zxdg_output_manager) {
                 struct swaylock_surface *surface;