degesch: add an option to save config on quit

degesch.c

@@ -1578,6 +1578,10 @@ static struct config_schema g_config_behaviour[] =
 	  .type      = CONFIG_ITEM_BOOLEAN,
 	  .default_  = "off",
 	  .on_change = on_config_logging_change },
+	{ .name      = "save_on_quit",
+	  .comment   = "Save configuration before quitting",
+	  .type      = CONFIG_ITEM_BOOLEAN,
+	  .default_  = "on" },
 	{}
 };
 
@@ -6306,6 +6310,30 @@ dump_matching_options
 	}
 }
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+static void
+save_configuration (struct app_context *ctx)
+{
+	struct str data;
+	str_init (&data);
+	serialize_configuration (ctx, &data);
+
+	struct error *e = NULL;
+	char *filename = write_configuration_file (&data, &e);
+	str_free (&data);
+
+	if (!filename)
+	{
+		log_global_error (ctx,
+			"#s: #s", "Saving configuration failed", e->message);
+		error_free (e);
+	}
+	else
+		log_global_status (ctx, "Configuration written to `#s'", filename);
+	free (filename);
+}
+
 // --- Server management -------------------------------------------------------
 
 static bool
@@ -6782,27 +6810,10 @@ handle_command_set (struct handler_args *a)
 static bool
 handle_command_save (struct handler_args *a)
 {
-	struct app_context *ctx = a->ctx;
 	if (*a->arguments)
 		return false;
 
-	struct str data;
+	save_configuration (a->ctx);
-	str_init (&data);
-	serialize_configuration (ctx, &data);
-
-	struct error *e = NULL;
-	char *filename = write_configuration_file (&data, &e);
-	str_free (&data);
-
-	if (!filename)
-	{
-		log_global_error (ctx,
-			"#s: #s", "Saving configuration failed", e->message);
-		error_free (e);
-	}
-	else
-		log_global_status (ctx, "Configuration written to `#s'", filename);
-	free (filename);
 	return true;
 }
 
@@ -9011,6 +9022,9 @@ main (int argc, char *argv[])
 	while (ctx.polling)
 		poller_run (&ctx.poller);
 
+	if (get_config_boolean (ctx.config.root, "behaviour.save_on_quit"))
+		save_configuration (&ctx);
+
 	app_context_free (&ctx);
 	free_terminal ();
 	return EXIT_SUCCESS;