diff --git a/scripts/menus/ddns.sh b/scripts/menus/ddns.sh
index d672ae43..fa89e6a2 100644
--- a/scripts/menus/ddns.sh
+++ b/scripts/menus/ddns.sh
@@ -1,15 +1,15 @@
 #! /bin/bash
 # Copyright (C) Juewuy
 
-
-ddns_menu(){
-	echo -----------------------------------------------
-	echo -e "\033[30;46m欢迎使用DDNS！\033[0m"
-	load_ddns
+ddns_menu() {
+    echo "-----------------------------------------------"
+    echo -e "\033[30;46m欢迎使用DDNS！\033[0m"
+    load_ddns
 }
+
 add_ddns() {
-	cat >>"$ddns_dir" <<EOF
-	
+    cat >>"$ddns_dir" <<EOF
+
 config service '$service'
 	option enabled '1'
 	option force_unit 'hours'
@@ -27,113 +27,151 @@ config service '$service'
 	option interface 'wan'
 	option bind_network 'wan'
 EOF
-	/usr/lib/ddns/dynamic_dns_updater.sh -S "$service" start >/dev/null 2>&1 &
-	sleep 3
-	echo 服务已经添加！
+    /usr/lib/ddns/dynamic_dns_updater.sh -S "$service" start >/dev/null 2>&1 &
+    sleep 3
+    echo "服务已经添加！"
 }
+
 set_ddns() {
-	echo -----------------------------------------------
-	read -p "请输入你的域名 > " str
-	[ -z "$str" ] && domain="$domain" || domain="$str"
-	echo -----------------------------------------------
-	read -p "请输入用户名或邮箱 > " str
-	[ -z "$str" ] && username="$username" || username="$str"
-	echo -----------------------------------------------
-	read -p "请输入密码或令牌秘钥 > " str
-	[ -z "$str" ] && password="$password" || password="$str"
-	echo -----------------------------------------------
-	read -p "请输入检测更新间隔(单位:分钟;默认为10) > " check_interval
-	[ -z "$check_interval" ] || [ "$check_interval" -lt 1 -o "$check_interval" -gt 1440 ] && check_interval=10
-	echo -----------------------------------------------
-	read -p "请输入强制更新间隔(单位:小时;默认为24) > " force_interval
-	[ -z "$force_interval" ] || [ "$force_interval" -lt 1 -o "$force_interval" -gt 240 ] && force_interval=24
-	echo -----------------------------------------------
-	echo -e "请核对如下信息："
-	echo -e "服务商：		\033[32m$service\033[0m"
-	echo -e "域名：			\033[32m$domain\033[0m"
-	echo -e "用户名：		\033[32m$username\033[0m"
-	echo -e "检测间隔：		\033[32m$check_interval\033[0m"
-	echo -----------------------------------------------
-	read -p "确认添加？(1/0) > " res
-	[ "$res" = 1 ] && add_ddns || set_ddns
+    echo "-----------------------------------------------"
+    read -r -p "请输入你的域名 > " str
+    [ -z "$str" ] && domain="$domain" || domain="$str"
+    echo "-----------------------------------------------"
+    read -r -p "请输入用户名或邮箱 > " str
+    [ -z "$str" ] && username="$username" || username="$str"
+    echo "-----------------------------------------------"
+    read -r -p "请输入密码或令牌秘钥 > " str
+    [ -z "$str" ] && password="$password" || password="$str"
+    echo "-----------------------------------------------"
+    read -r -p "请输入检测更新间隔(单位:分钟;默认为10) > " check_interval
+    [ -z "$check_interval" ] || [ "$check_interval" -lt 1 -o "$check_interval" -gt 1440 ] && check_interval=10
+    echo "-----------------------------------------------"
+    read -r -p "请输入强制更新间隔(单位:小时;默认为24) > " force_interval
+    [ -z "$force_interval" ] || [ "$force_interval" -lt 1 -o "$force_interval" -gt 240 ] && force_interval=24
+    echo "-----------------------------------------------"
+    echo -e "请核对如下信息："
+    echo -e "服务商：		\033[32m$service\033[0m"
+    echo -e "域名：			\033[32m$domain\033[0m"
+    echo -e "用户名：		\033[32m$username\033[0m"
+    echo -e "检测间隔：		\033[32m$check_interval\033[0m"
+    echo "-----------------------------------------------"
+    read -r -p "确认添加？(1/0) > " res
+    if [ "$res" = 1 ]; then
+        add_ddns
+    else
+        set_ddns
+    fi
 }
+
 set_ddns_service() {
-	services_dir=/etc/ddns/"$serv"
-	[ -s "$services_dir" ] || services_dir=/usr/share/ddns/list
-	echo -----------------------------------------------
-	echo -e "\033[32m请选择服务提供商\033[0m"
-	cat "$services_dir" | grep -v '^#' | awk '{print " "NR" " $1}'
-	nr=$(cat "$services_dir" | grep -v '^#' | wc -l)
-	read -p "请输入对应数字 > " num
-	if [ -z "$num" ]; then
-		i=
-	elif [ "$num" -gt 0 -a "$num" -lt $nr ]; then
-		service_name=$(cat "$services_dir" | grep -v '^#' | awk '{print $1}' | sed -n "$num"p | sed 's/"//g')
-		service=$(echo $service_name | sed 's/\./_/g')
-		set_ddns
-	else
-		echo "输入错误，请重新输入！"
-		sleep 1
-		set_ddns_service
-	fi
+    while true; do
+        services_dir=/etc/ddns/"$serv"
+        [ -s "$services_dir" ] || services_dir=/usr/share/ddns/list
+        echo "-----------------------------------------------"
+        echo -e "\033[32m请选择服务提供商\033[0m"
+        cat "$services_dir" | grep -v '^#' | awk '{print " "NR" " $1}'
+        nr=$(cat "$services_dir" | grep -v '^#' | wc -l)
+        read -r -p "请输入对应数字 > " num
+        if [ -z "$num" ]; then
+            i=
+            break
+        elif [ "$num" -gt 0 ] && [ "$num" -lt "$nr" ]; then
+            service_name=$(cat "$services_dir" | grep -v '^#' | awk '{print $1}' | sed -n "$num"p | sed 's/"//g')
+            service=$(echo "$service_name" | sed 's/\./_/g')
+            set_ddns
+            break
+        else
+            echo "输入错误，请重新输入！"
+            sleep 1
+        fi
+    done
 }
+
 set_ddns_type() {
-	echo -----------------------------------------------
-	echo -e "\033[32m请选择网络模式\033[0m"
-	echo -e " 1 \033[36mIPV4\033[0m"
-	echo -e " 2 \033[36mIPV6\033[0m"
-	read -p "请输入对应数字 > " num
-	if [ -z "$num" ]; then
-		i=
-	elif [ "$num" = 1 ]; then
-		use_ipv6=0
-		serv=services
-		set_ddns_service
-	elif [ "$num" = 2 ]; then
-		use_ipv6=1
-		serv=services_ipv6
-		set_ddns_service
-	else
-		echo "输入错误，请重新输入！"
-		sleep 1
-		set_ddns_type
-	fi
+    while true; do
+        echo "-----------------------------------------------"
+        echo -e "\033[32m请选择网络模式\033[0m"
+        echo -e " 1 \033[36mIPV4\033[0m"
+        echo -e " 2 \033[36mIPV6\033[0m"
+        echo -e " 0 返回上级菜单"
+        read -r -p "请输入对应数字 > " num
+        case "$num" in
+        "" | 0)
+            break
+            ;;
+        1)
+            use_ipv6=0
+            serv=services
+            set_ddns_service
+            break
+            ;;
+        2)
+            use_ipv6=1
+            serv=services_ipv6
+            set_ddns_service
+            break
+            ;;
+        *)
+            echo "输入错误，请重新输入！"
+            sleep 1
+            ;;
+        esac
+    done
 }
+
 rev_ddns_service() {
-	enabled=$(uci get ddns."$service".enabled)
-	[ "$enabled" = 1 ] && enabled_b="停用" || enabled_b="启用"
-	echo -----------------------------------------------
-	echo -e " 1 \033[32m立即更新\033[0m"
-	echo -e " 2 编辑当前服务\033[0m"
-	echo -e " 3 $enabled_b当前服务"
-	echo -e " 4 移除当前服务"
-	echo -e " 5 查看运行日志"
-	echo -e " 0 返回上级菜单"
-	echo -----------------------------------------------
-	read -p "请输入对应数字 > " num
-	if [ -z "$num" -o "$num" = 0 ]; then
-		i=
-	elif [ "$num" = 1 ]; then
-		/usr/lib/ddns/dynamic_dns_updater.sh -S $service start >/dev/null 2>&1 &
-		sleep 3
-	elif [ "$num" = 2 ]; then
-		domain=$(uci get ddns."$service".domain 2>/dev/null)
-		username=$(uci get ddns."$service".username 2>/dev/null)
-		password=$(uci get ddns."$service".password 2>/dev/null)
-		service_name=$(uci get ddns."$service".service_name 2>/dev/null)
-		uci delete ddns."$service"
-		set_ddns
-	elif [ "$num" = 3 ]; then
-		[ "$enabled" = 1 ] && uci set ddns."$service".enabled='0' || uci set ddns."$service".enabled='1' && sleep 3
-		uci commit ddns."$service"
-	elif [ "$num" = 4 ]; then
-		uci delete ddns."$service"
-		uci commit ddns."$service"
-	elif [ "$num" = 5 ]; then
-		echo -----------------------------------------------
-		cat /var/log/ddns/"$service".log 2>/dev/null
-		sleep 1
-	fi
+    while true; do
+        enabled=$(uci get ddns."$service".enabled)
+        [ "$enabled" = 1 ] && enabled_b="停用" || enabled_b="启用"
+        echo "-----------------------------------------------"
+        echo -e " 1 \033[32m立即更新\033[0m"
+        echo -e " 2 编辑当前服务\033[0m"
+        echo -e " 3 $enabled_b当前服务"
+        echo -e " 4 移除当前服务"
+        echo -e " 5 查看运行日志"
+        echo -e " 0 返回上级菜单"
+        echo "-----------------------------------------------"
+        read -r -p "请输入对应数字 > " num
+        case "$num" in
+        "" | 0)
+            break
+            ;;
+        1)
+            /usr/lib/ddns/dynamic_dns_updater.sh -S "$service" start >/dev/null 2>&1 &
+            sleep 3
+            break
+            ;;
+        2)
+            domain=$(uci get ddns."$service".domain 2>/dev/null)
+            username=$(uci get ddns."$service".username 2>/dev/null)
+            password=$(uci get ddns."$service".password 2>/dev/null)
+            service_name=$(uci get ddns."$service".service_name 2>/dev/null)
+            uci delete ddns."$service"
+            set_ddns
+            break
+            ;;
+        3)
+            [ "$enabled" = 1 ] && uci set ddns."$service".enabled='0' || uci set ddns."$service".enabled='1' && sleep 3
+            uci commit ddns."$service"
+            break
+            ;;
+        4)
+            uci delete ddns."$service"
+            uci commit ddns."$service"
+            break
+            ;;
+        5)
+            echo "-----------------------------------------------"
+            cat /var/log/ddns/"$service".log 2>/dev/null
+            sleep 1
+            break
+            ;;
+        *)
+            echo "输入错误，请重新输入！"
+            sleep 1
+            ;;
+        esac
+    done
 }
 
 load_ddns() {