--- lbbs/src/file_loader.c	2025/10/18 12:06:10	1.17
+++ lbbs/src/file_loader.c	2025/11/04 14:58:56	1.20
@@ -1,18 +1,10 @@
-/***************************************************************************
-						file_loader.c  -  description
-							 -------------------
-	Copyright            : (C) 2004-2025 by Leaflet
-	Email                : leaflet@leafok.com
- ***************************************************************************/
-
-/***************************************************************************
- *                                                                         *
- *   This program is free software; you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 3 of the License, or     *
- *   (at your option) any later version.                                   *
- *                                                                         *
- ***************************************************************************/
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * file_loader
+ *   - shared memory based file loader
+ *
+ * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
+ */
 
 #include "file_loader.h"
 #include "log.h"
@@ -60,7 +52,7 @@ static void trie_file_dict_cleanup_cb(co
 {
 	int shmid = (int)value;
 
-	if (shmctl(shmid, IPC_RMID, NULL) == -1)
+	if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1)
 	{
 		log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", shmid, errno);
 	}
@@ -180,7 +172,7 @@ int load_file(const char *filename)
 	{
 		log_error("trie_dict_set(%s) error\n", filename);
 
-		if (shmctl(shmid, IPC_RMID, NULL) == -1)
+		if (shmid != 0 && shmctl(shmid, IPC_RMID, NULL) == -1)
 		{
 			log_error("shmctl(shmid=%d, IPC_RMID) error (%d)\n", shmid, errno);
 		}