Allow swaybg to be disabled

Same as #2791 but for swaybg.

Fixes #2790

1 files changed, 10 insertions, 5 deletions

diff --git a/sway/commands/swaybg_command.c b/sway/commands/swaybg_command.c
index 36f7fdcd..b184b193 100644
--- a/sway/commands/swaybg_command.c
+++ b/sway/commands/swaybg_command.c
@@ -9,12 +9,17 @@ struct cmd_results *cmd_swaybg_command(int argc, char **argv) {
                 return error;
         }
 
-        if (config->swaybg_command) {
-                free(config->swaybg_command);
+        free(config->swaybg_command);
+        config->swaybg_command = NULL;
+
+        char *new_command = join_args(argv, argc);
+        if (strcmp(new_command, "-") != 0) {
+                config->swaybg_command = new_command;
+                wlr_log(WLR_DEBUG, "Using custom swaybg command: %s",
+                                config->swaybg_command);
+        } else {
+                free(new_command);
         }
-        config->swaybg_command = join_args(argv, argc);
-        wlr_log(WLR_DEBUG, "Using custom swaybg command: %s",
-                        config->swaybg_command);
 
         return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }