Swaylock: Log error if multiple images are defined for the same output

1 files changed, 17 insertions, 0 deletions

diff --git a/swaylock/main.c b/swaylock/main.c
index 91c28bd2..74a00a35 100644
--- a/swaylock/main.c
+++ b/swaylock/main.c
@@ -223,6 +223,23 @@ static void load_image(char *arg, struct swaylock_state *state) {
                 image->path = strdup(arg);
         }
 
+        bool exists = false;
+        struct swaylock_image *iter_image;
+        wl_list_for_each(iter_image, &state->images, link) {
+                if (lenient_strcmp(iter_image->output_name, image->output_name) == 0) {
+                        exists = true;
+                        break;
+                }
+        }
+        if (exists) {
+                if (image->output_name) {
+                        wlr_log(L_ERROR, "Multiple images defined for output %s",
+                                image->output_name);
+                } else {
+                        wlr_log(L_ERROR, "Multiple default images defined");
+                }
+        }
+
         // Bash doesn't replace the ~ with $HOME if the output name is supplied
         wordexp_t p;
         if (wordexp(image->path, &p, 0) == 0) {