refactor(set_shadowsocks): replace recursion with while loop

scripts/menus/7_gateway.sh

@@ -364,7 +364,8 @@ EOF
     done
 }
 
-set_shadowsocks(){
+set_shadowsocks() {
+    while true; do
         echo "-----------------------------------------------"
         echo -e "\033[31m注意：\033[0m设置的端口会添加到公网访问防火墙并自动放行！\n      脚本只提供基础功能，更多需求请用自定义配置文件功能！"
         echo -e "      \033[31m切勿用于搭建违法翻墙节点，违者后果自负！\033[0m"
@@ -378,15 +379,17 @@ set_shadowsocks(){
             echo -e " 5 一键生成分享链接"
         echo -e " 0 返回上级菜单 \033[0m"
         echo "-----------------------------------------------"
-	read -p "请输入对应数字 > " num
+        read -r -p "请输入对应数字 > " num
         case "$num" in
-	0) ;;
+        "" | 0)
+            break
+            ;;
         1)
-		if [ "$sss_service" = ON ];then
+            if [ "$sss_service" = ON ]; then
                 sss_service=OFF
                 setconfig sss_service "$sss_service"
             else
-			if [ -n "$sss_port" ] && [ -n "$sss_cipher" ] && [ -n "$sss_pwd" ];then
+                if [ -n "$sss_port" ] && [ -n "$sss_cipher" ] && [ -n "$sss_pwd" ]; then
                     sss_service=ON
                     setconfig sss_service "$sss_service"
                 else
@@ -394,11 +397,10 @@ set_shadowsocks(){
                     sleep 1
                 fi
             fi
-		set_shadowsocks
             ;;
         2)
-		read -p "请输入端口号(输入0删除) > " text
-		if [ "$text" = 0 ];then
+            read -r -p "请输入端口号(输入0删除) > " text
+            if [ "$text" = 0 ]; then
                 sss_port=''
                 setconfig sss_port "" "$GT_CFG_PATH"
             elif check_port "$text"; then
@@ -407,7 +409,6 @@ set_shadowsocks(){
             else
                 sleep 1
             fi
-		set_shadowsocks
             ;;
         3)
             echo "-----------------------------------------------"
@@ -424,9 +425,9 @@ set_shadowsocks(){
             }
             echo "-----------------------------------------------"
             echo -e " 0 返回上级菜单"
-		read -p "请选择要使用的加密协议 > " num
+            read -r -p "请选择要使用的加密协议 > " num
             case "$num" in
-		1)
+            "" | 1)
                 sss_cipher=xchacha20-ietf-poly1305
                 sss_pwd=$(gen_random 16)
                 ;;
@@ -454,27 +455,24 @@ set_shadowsocks(){
                 sss_cipher=2022-blake3-aes-256-gcm
                 sss_pwd=$(gen_random 32)
                 ;;
-		*)
-		;;
+            *) ;;
             esac
             setconfig sss_cipher "$sss_cipher" "$GT_CFG_PATH"
             setconfig sss_pwd "$sss_pwd" "$GT_CFG_PATH"
-		set_shadowsocks
             ;;
         4)
-		if echo "$sss_cipher" |grep -q '2022-blake3';then
+            if echo "$sss_cipher" | grep -q '2022-blake3'; then
                 echo -e "\033[31m注意：\033[0m2022系列加密必须使用脚本随机生成的password！"
                 sleep 1
             else
-			read -p "请输入秘钥(输入0删除) > " text
+                read -r -p "请输入秘钥(输入0删除) > " text
                 [ "$text" = 0 ] && sss_pwd='' || sss_pwd="$text"
                 setconfig sss_pwd "$text" "$GT_CFG_PATH"
             fi
-		set_shadowsocks
             ;;
         5)
-		read -p "请输入本机公网IP(4/6)或域名 > " text
-		if [ -n "$text" ] && [ -n "$sss_port" ] && [ -n "$sss_cipher" ] && [ -n "$sss_pwd" ];then
+            read -r -p "请输入本机公网IP(4/6)或域名 > " text
+            if [ -n "$text" ] && [ -n "$sss_port" ] && [ -n "$sss_cipher" ] && [ -n "$sss_pwd" ]; then
                 ss_link="ss://$(gen_base64 "$sss_cipher":"$sss_pwd")@${text}:${sss_port}#ShellCrash_ss_in"
                 echo "-----------------------------------------------"
                 echo -e "你的分享链接是(请勿随意分享给他人):\n\033[32m$ss_link\033[0m"
@@ -482,10 +480,13 @@ set_shadowsocks(){
                 echo -e "\033[31m请先完成必选设置！\033[0m"
             fi
             sleep 1
-		set_shadowsocks
             ;;
-	*) errornum ;;
+        *)
+            errornum
+            sleep 1
+            ;;
         esac
+    done
 }
 
 # 自定义端点