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);
 }