refactor(dns.sh): replace recursion with while loop

scripts/menus/dns.sh

@@ -6,32 +6,36 @@ __IS_MODULE_DNS_LOADED=1
 
 load_lang dns
 
-set_dns_mod() { # DNS 模式设置
-    [ -z "$hosts_opt" ] && hosts_opt=ON
-    [ -z "$dns_protect" ] && dns_protect=ON
-    [ -z "$ecs_subnet" ] && ecs_subnet=OFF
+# DNS 模式设置
+set_dns_mod() {
+    while true; do
+        [ -z "$hosts_opt" ] && hosts_opt=ON
+        [ -z "$dns_protect" ] && dns_protect=ON
+        [ -z "$ecs_subnet" ] && ecs_subnet=OFF
 
-    echo "-----------------------------------------------"
-    echo -e "$DNS_CURRENT_MODE \033[47;30m $dns_mod \033[0m"
-    echo -e "\033[33m$DNS_RESTART_NOTICE\033[0m"
-    echo "-----------------------------------------------"
-    echo -e " 1 MIX$COMMON_MOD：\t\033[32m$DNS_MODE_MIX_DESC\033[0m"
-    echo -e " 2 Route$COMMON_MOD：\t\033[32m$DNS_MODE_ROUTE_DESC\033[0m"
-    echo -e " 3 Redir$COMMON_MOD：\t\033[33m$DNS_MODE_REDIR_DESC\033[0m"
-    echo "-----------------------------------------------"
-	echo -e " 4 $DNS_MENU_PROTECT：\t\033[36m$dns_protect\033[0m\t$DNS_PROTECT_DESC"
-	echo -e " 5 $DNS_MENU_HOSTS：\t\033[36m$hosts_opt\033[0m\t$DNS_HOSTS_DESC"
-	echo -e " 6 $DNS_MENU_ECS：\t\033[36m$ecs_subnet\033[0m\t$DNS_ECS_DESC"
-	echo -e " 7 $DNS_MENU_REDIR：\033[36m$dns_redir_port\033[0m\t$DNS_REDIR_PORT_DESC"
-    [ "$dns_mod" = "mix" ] && 
-        echo -e " 8 \033[33m$DNS_FAKEIP_MENU\033[0m"
-    echo -e " 9 \033[36m$DNS_ADV_MENU\033[0m"
-    echo "-----------------------------------------------"
-    echo " 0 $COMMON_BACK"
-    read -p "$COMMON_INPUT > " num
-    case "$num" in
-        0) ;;
-        1|2)
+        echo "-----------------------------------------------"
+        echo -e "$DNS_CURRENT_MODE \033[47;30m $dns_mod \033[0m"
+        echo -e "\033[33m$DNS_RESTART_NOTICE\033[0m"
+        echo "-----------------------------------------------"
+        echo -e " 1 MIX$COMMON_MOD：\t\033[32m$DNS_MODE_MIX_DESC\033[0m"
+        echo -e " 2 Route$COMMON_MOD：\t\033[32m$DNS_MODE_ROUTE_DESC\033[0m"
+        echo -e " 3 Redir$COMMON_MOD：\t\033[33m$DNS_MODE_REDIR_DESC\033[0m"
+        echo "-----------------------------------------------"
+        echo -e " 4 $DNS_MENU_PROTECT：\t\033[36m$dns_protect\033[0m\t$DNS_PROTECT_DESC"
+        echo -e " 5 $DNS_MENU_HOSTS：\t\033[36m$hosts_opt\033[0m\t$DNS_HOSTS_DESC"
+        echo -e " 6 $DNS_MENU_ECS：\t\033[36m$ecs_subnet\033[0m\t$DNS_ECS_DESC"
+        echo -e " 7 $DNS_MENU_REDIR：\033[36m$dns_redir_port\033[0m\t$DNS_REDIR_PORT_DESC"
+        [ "$dns_mod" = "mix" ] &&
+            echo -e " 8 \033[33m$DNS_FAKEIP_MENU\033[0m"
+        echo -e " 9 \033[36m$DNS_ADV_MENU\033[0m"
+        echo "-----------------------------------------------"
+        echo " 0 $COMMON_BACK"
+        read -r -p "$COMMON_INPUT > " num
+        case "$num" in
+        "" | 0)
+            break
+            ;;
+        1 | 2)
             if echo "$crashcore" | grep -q 'singbox' || [ "$crashcore" = meta ]; then
                 [ "$num" = 1 ] && dns_mod=mix || dns_mod=route
                 setconfig dns_mod "$dns_mod"
@@ -41,36 +45,31 @@ set_dns_mod() { # DNS 模式设置
                 echo -e "\033[31m$DNS_CORE_UNSUPPORTED\033[0m"
                 sleep 1
             fi
-            set_dns_mod
-        ;;
+            ;;
         3)
             dns_mod=redir_host
             setconfig dns_mod "$dns_mod"
             echo -e "\033[36m$DNS_SET_OK: $dns_mod\033[0m"
-            set_dns_mod
-        ;;
+            ;;
         4)
             [ "$dns_protect" = ON ] && dns_protect=OFF || dns_protect=ON
             setconfig dns_protect "$dns_protect"
-            set_dns_mod
-        ;;
+            ;;
         5)
             [ "$hosts_opt" = ON ] && hosts_opt=OFF || hosts_opt=ON
             setconfig hosts_opt "$hosts_opt"
-            set_dns_mod
-        ;;
+            ;;
         6)
             [ "$ecs_subnet" = ON ] && ecs_subnet=OFF || ecs_subnet=ON
             setconfig ecs_subnet "$ecs_subnet"
-            set_dns_mod
-        ;;
+            ;;
         7)
             echo "-----------------------------------------------"
             echo -e "\033[31m$DNS_REDIR_WARN\033[0m"
             echo -e "\033[33m$DNS_REDIR_HINT 127.0.0.1:$dns_port\033[0m"
             echo "-----------------------------------------------"
 
-            read -p "$DNS_REDIR_INPUT" num
+            read -r -p "$DNS_REDIR_INPUT" num
 
             if [ "$num" = 0 ]; then
                 dns_redir_port="$dns_port"
@@ -86,93 +85,95 @@ set_dns_mod() { # DNS 模式设置
                 errornum
             fi
             sleep 1
-            set_dns_mod
-        ;;
+            ;;
         8)
             fake_ip_filter
-            set_dns_mod
-        ;;
+            ;;
         9)
             set_dns_adv
-            set_dns_mod
-        ;;
+            ;;
         *)
             errornum
-        ;;
-    esac
+            sleep 1
+            ;;
+        esac
+    done
 }
 
 fake_ip_filter() {
-    echo -e "\033[32m$DNS_FAKEIP_DESC\033[0m"
-    echo -e "\033[31m$DNS_FAKEIP_TIP\033[0m"
-    echo -e "\033[36m$DNS_FAKEIP_EXAMPLE\033[0m"
-    echo "-----------------------------------------------"
-    if [ -s "$CRASHDIR/configs/fake_ip_filter" ]; then
-        echo -e "\033[33m$DNS_FAKEIP_EXIST\033[0m"
-        awk '{print NR" "$1}' "$CRASHDIR/configs/fake_ip_filter"
-    else
-        echo -e "\033[33m$DNS_FAKEIP_EMPTY\033[0m"
-    fi
-    echo "-----------------------------------------------"
-    read -p "$DNS_FAKEIP_EDIT > " input
-    case "$input" in
-        0|'') ;;
+    while true; do
+        echo -e "\033[32m$DNS_FAKEIP_DESC\033[0m"
+        echo -e "\033[31m$DNS_FAKEIP_TIP\033[0m"
+        echo -e "\033[36m$DNS_FAKEIP_EXAMPLE\033[0m"
+        echo "-----------------------------------------------"
+        if [ -s "$CRASHDIR/configs/fake_ip_filter" ]; then
+            echo -e "\033[33m$DNS_FAKEIP_EXIST\033[0m"
+            awk '{print NR" "$1}' "$CRASHDIR/configs/fake_ip_filter"
+        else
+            echo -e "\033[33m$DNS_FAKEIP_EMPTY\033[0m"
+        fi
+        echo "-----------------------------------------------"
+        read -r -p "$DNS_FAKEIP_EDIT > " input
+        case "$input" in
+        "" | 0)
+            break
+            ;;
         *)
             if [ "$input" -ge 1 ] 2>/dev/null; then
                 sed -i "${input}d" "$CRASHDIR/configs/fake_ip_filter"
                 echo -e "\033[32m$COMMON_REMOVE_OK\033[0m"
             else
                 echo -e "$COMMON_YOUR_INPUT \033[32m$input\033[0m"
-                read -p "$COMMON_CONFIRM" res
+                read -r -p "$COMMON_CONFIRM" res
                 [ "$res" = 1 ] && echo "$input" >>"$CRASHDIR/configs/fake_ip_filter"
             fi
             sleep 1
-            fake_ip_filter
-        ;;
-    esac
+            ;;
+        esac
+    done
 }
 
-set_dns_adv() { # DNS详细设置
-    echo "-----------------------------------------------"
-    echo -e "DIRECT-DNS ：\033[32m$dns_nameserver\033[0m"
-    echo -e "PROXY-DNS  ：\033[36m$dns_fallback\033[0m"
-    echo -e "DEFAULT-DNS：\033[33m$dns_resolver\033[0m"
+# DNS详细设置
+set_dns_adv() {
+    while true; do
+        echo "-----------------------------------------------"
+        echo -e "DIRECT-DNS ：\033[32m$dns_nameserver\033[0m"
+        echo -e "PROXY-DNS  ：\033[36m$dns_fallback\033[0m"
+        echo -e "DEFAULT-DNS：\033[33m$dns_resolver\033[0m"
 
-    echo -e "$DNS_ADV_SPLIT"
-    echo -e "\033[33m$DNS_ADV_CERT\033[0m"
-    echo -e "\033[31m$DNS_ADV_SINGBOX_LIMIT\033[0m"
+        echo -e "$DNS_ADV_SPLIT"
+        echo -e "\033[33m$DNS_ADV_CERT\033[0m"
+        echo -e "\033[31m$DNS_ADV_SINGBOX_LIMIT\033[0m"
 
-    echo "-----------------------------------------------"
-    echo -e " 1 $DNS_ADV_EDIT_DIRECT"
-    echo -e " 2 $DNS_ADV_EDIT_PROXY"
-    echo -e " 3 $DNS_ADV_EDIT_DEFAULT"
-    echo -e " 4 \033[32m$DNS_ADV_AUTO_ENCRYPT\033[0m"
-    echo -e " 9 \033[33m$DNS_ADV_RESET\033[0m"
-    echo -e " 0 $COMMON_BACK"
-    echo "-----------------------------------------------"
+        echo "-----------------------------------------------"
+        echo -e " 1 $DNS_ADV_EDIT_DIRECT"
+        echo -e " 2 $DNS_ADV_EDIT_PROXY"
+        echo -e " 3 $DNS_ADV_EDIT_DEFAULT"
+        echo -e " 4 \033[32m$DNS_ADV_AUTO_ENCRYPT\033[0m"
+        echo -e " 9 \033[33m$DNS_ADV_RESET\033[0m"
+        echo -e " 0 $COMMON_BACK"
+        echo "-----------------------------------------------"
 
-    read -p "$COMMON_INPUT > " num
+        read -r -p "$COMMON_INPUT > " num
 
-    case "$num" in
-        0) ;;
+        case "$num" in
+        "" | 0)
+            break
+            ;;
         1)
-            read -p "$DNS_INPUT_NEW" dns_nameserver
+            read -r -p "$DNS_INPUT_NEW" dns_nameserver
             dns_nameserver=$(echo "$dns_nameserver" | sed 's#|#,\ #g')
             [ -n "$dns_nameserver" ] && setconfig dns_nameserver "'$dns_nameserver'"
             echo -e "\033[32m$COMMON_SUCCESS\033[0m"
-            sleep 1
-            set_dns_adv
-        ;;
+            ;;
         2)
-            read -p "$DNS_INPUT_NEW" dns_fallback
+            read -r -p "$DNS_INPUT_NEW" dns_fallback
             dns_fallback=$(echo "$dns_fallback" | sed 's#|#,\ #g')
             [ -n "$dns_fallback" ] && setconfig dns_fallback "'$dns_fallback'"
             echo -e "\033[32m$COMMON_SUCCESS\033[0m"
-            sleep 1
-            set_dns_adv
-        ;;
+            ;;
         3)
-            read -p "$DNS_INPUT_NEW" text
+            read -r -p "$DNS_INPUT_NEW" text
             if echo "$text" | grep -qE '://.*::'; then
                 echo -e "\033[31m$DNS_IPV6_NOT_SUPPORT\033[0m"
             else
@@ -180,9 +181,7 @@ set_dns_adv() { # DNS详细设置
                 setconfig dns_resolver "'$dns_resolver'"
                 echo -e "\033[32m$COMMON_SUCCESS\033[0m"
             fi
-            sleep 1
-            set_dns_adv
-        ;;
+            ;;
         4)
             if echo "$crashcore" | grep -qE 'meta|singbox'; then
                 dns_nameserver='https://dns.alidns.com/dns-query, https://doh.pub/dns-query'
@@ -195,21 +194,18 @@ set_dns_adv() { # DNS详细设置
             else
                 echo -e "\033[31m$DNS_CORE_REQUIRE\033[0m"
             fi
-            sleep 1
-            set_dns_adv
-        ;;
+            ;;
         9)
             setconfig dns_nameserver
             setconfig dns_fallback
             setconfig dns_resolver
             . "$CRASHDIR/libs/get_config.sh"
             echo -e "\033[32m$COMMON_SUCCESS\033[0m"
-            sleep 1
-            set_dns_adv
-        ;;
+            ;;
         *)
             errornum
-            sleep 1
-        ;;
-    esac
+            ;;
+        esac
+        sleep 1
+    done
 }