--- lbbs/src/common.c	2004/10/19 17:10:39	1.1
+++ lbbs/src/common.c	2025/05/13 03:07:54	1.19
@@ -1,24 +1,30 @@
 /***************************************************************************
-                          common.c  -  description
-                             -------------------
-    begin                : Mon Oct 18 2004
-    copyright            : (C) 2004 by Leaflet
-    email                : leaflet@leafok.com
+						  common.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 2 of the License, or     *
+ *   the Free Software Foundation; either version 3 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
 
-//Global declaration for enviroment
-char app_home_dir[256];
+#include "common.h"
+#include "log.h"
+#include "menu.h"
+#include <string.h>
+#include <time.h>
+#include <sys/types.h>
 
-//Global declaration for sockets
+// Version information
+char app_version[256] = "LBBS-devel version 1.0";
+
+// Global declaration for sockets
 int socket_server;
 int socket_client;
 char hostaddr_server[50];
@@ -26,7 +32,115 @@ char hostaddr_client[50];
 int port_server;
 int port_client;
 
-//Global declaration for database
-char DB_host[256];
-char DB_username[50];
-char DB_password[50];
+// Global declaration for system
+volatile int SYS_server_exit = 0;
+volatile int SYS_child_process_count = 0;
+volatile int SYS_child_exit = 0;
+volatile int SYS_menu_reload = 0;
+
+// Common function
+const char *str_space(char *string, int length)
+{
+	int i;
+	for (i = 0; i < length; i++)
+	{
+		string[i] = ' ';
+	}
+	string[length] = '\0';
+	return string;
+}
+
+const char *get_time_str(char *s, size_t len)
+{
+	time_t curtime = time(NULL);
+	struct tm *loctime;
+	loctime = localtime(&curtime);
+
+	size_t j = strftime(s, len, "%Y年%m月%d日%H:%M:%S ", loctime);
+
+	if (j == 0)
+	{
+		return NULL;
+	}
+
+	switch (loctime->tm_wday)
+	{
+	case 0:
+		strncat(s, "星期天", len - j);
+		break;
+	case 1:
+		strncat(s, "星期一", len - j);
+		break;
+	case 2:
+		strncat(s, "星期二", len - j);
+		break;
+	case 3:
+		strncat(s, "星期三", len - j);
+		break;
+	case 4:
+		strncat(s, "星期四", len - j);
+		break;
+	case 5:
+		strncat(s, "星期五", len - j);
+		break;
+	case 6:
+		strncat(s, "星期六", len - j);
+		break;
+	}
+
+	return s;
+}
+
+void sig_hup_handler(int i)
+{
+	SYS_menu_reload = 1;
+}
+
+void sig_term_handler(int i)
+{
+	log_std("Debug: SIGTERM captured\n");
+	SYS_server_exit = 1;
+}
+
+void sig_chld_handler(int i)
+{
+	SYS_child_exit = 1;
+}
+
+const char * ip_mask(char * s, int level, char mask)
+{
+	char * p = s;
+
+	if (level <= 0)
+	{
+		return s;
+	}
+	if (level > 4)
+	{
+		level = 4;
+	}
+
+	for (int i = 0; i < 4 - level; i++)
+	{
+		p = strchr(p, '.');
+		if (p == NULL)
+		{
+			return s;
+		}
+		p++;
+	}
+
+	for (int i = 0; i < level; i++)
+	{
+		*p = mask;
+		p++;
+		if (i < level - 1)
+		{
+			*p = '.';
+			p++;
+		}
+	}
+	*p = '\0';
+
+	return s;
+}