refactor(set_core_config): replace recursion with while loop

scripts/menus/6_core_config.sh

@@ -1031,6 +1031,7 @@ set_core_config_link(){ #直接导入配置
 
 # 配置文件主界面
 set_core_config() {
+    while true; do
         [ -z "$rule_link" ] && rule_link=1
         [ -z "$server_link" ] && server_link=1
         echo "$crashcore" | grep -q 'singbox' && config_path="$JSONSDIR"/config.json || config_path="$YAMLSDIR"/config.yaml
@@ -1054,7 +1055,8 @@ set_core_config(){
         [ "$inuserguide" = 1 ] || echo -e " 0 返回上级菜单"
         read -p "请输入对应数字 > " num
         case "$num" in
-	0)
+        "" | 0)
+            break
             ;;
         1)
             if [ -n "$Url" ]; then
@@ -1072,16 +1074,13 @@ set_core_config(){
                 fi
             fi
             gen_core_config_link
-		set_core_config
             ;;
         2)
             if [ -f "$CRASHDIR"/v2b_api.sh ]; then
                 . "$CRASHDIR"/v2b_api.sh
-			set_core_config
             else
                 set_core_config_link
             fi
-		set_core_config
             ;;
         3)
             if [ "$crashcore" = meta -o "$crashcore" = clashpre ]; then
@@ -1095,17 +1094,17 @@ set_core_config(){
                 sleep 1
                 checkupdate && setcore
             fi
-		set_core_config
             ;;
         4)
             echo "-----------------------------------------------"
             echo -e "\033[33m请将本地配置文件上传到/tmp目录并重命名为config.yaml或者config.json\033[0m"
             echo -e "\033[32m之后重新运行本脚本即可自动弹出导入提示！\033[0m"
+            sleep 2
             exit
             ;;
         5)
             . "$CRASHDIR"/menus/5_task.sh && task_menu
-		set_core_config
+            break
             ;;
         6)
             checkcfg=$(cat $CFG_PATH)
@@ -1114,14 +1113,12 @@ set_core_config(){
                 checkcfg_new=$(cat $CFG_PATH)
                 [ "$checkcfg" != "$checkcfg_new" ] && checkrestart
             fi
-		set_core_config
             ;;
         7)
             if [ -z "$Url" -a -z "$Https" ]; then
                 echo "-----------------------------------------------"
                 echo -e "\033[31m没有找到你的配置文件/订阅链接！请先输入链接！\033[0m"
                 sleep 1
-			set_core_config
             else
                 echo "-----------------------------------------------"
                 echo -e "\033[33m当前系统记录的链接为：\033[0m"
@@ -1130,8 +1127,7 @@ set_core_config(){
                 read -p "确认更新配置文件？[1/0] > " res
                 if [ "$res" = '1' ]; then
                     jump_core_config
-			else
-				set_core_config
+                    break
                 fi
             fi
             ;;
@@ -1139,20 +1135,20 @@ set_core_config(){
             if [ ! -f ${config_path}.bak ]; then
                 echo "-----------------------------------------------"
                 echo -e "\033[31m没有找到配置文件的备份！\033[0m"
-			set_core_config
             else
                 echo "-----------------------------------------------"
-			echo -e 备份文件共有"\033[32m`wc -l < ${config_path}.bak`\033[0m"行内容，当前文件共有"\033[32m`wc -l < ${config_path}`\033[0m"行内容
+                echo -e 备份文件共有"\033[32m$(wc -l <${config_path}.bak)\033[0m"行内容，当前文件共有"\033[32m$(wc -l <${config_path})\033[0m"行内容
                 read -p "确认还原配置文件？此操作不可逆！[1/0] > " res
                 if [ "$res" = '1' ]; then
                     mv ${config_path}.bak ${config_path}
                     echo "----------------------------------------------"
                     echo -e "\033[32m配置文件已还原！请手动重启服务！\033[0m"
                     sleep 1
+                    break
                 else
                     echo "-----------------------------------------------"
                     echo -e "\033[31m操作已取消！返回上级菜单！\033[0m"
-				set_core_config
+                    sleep 1
                 fi
             fi
             ;;
@@ -1183,10 +1179,12 @@ set_core_config(){
                 ;;
             esac
             [ "$num" -le 3 ] && setconfig user_agent "$user_agent"
-		set_core_config
             ;;
         *)
             errornum
+            sleep 1
+            break
             ;;
         esac
+    done
 }