From 180629c8ddb30b3dd8fd6c66a901444fcedc227e Mon Sep 17 00:00:00 2001
From: Sofia <253282481+sofia-riese@users.noreply.github.com>
Date: Sun, 18 Jan 2026 09:14:43 +0800
Subject: [PATCH] perf: optimize port validation with efficient grep usage

- Use 'grep -q' to avoid unnecessary output and sub-shell usage
---
 scripts/menus/check_port.sh | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/scripts/menus/check_port.sh b/scripts/menus/check_port.sh
index 1a3c288f..728ea1ba 100644
--- a/scripts/menus/check_port.sh
+++ b/scripts/menus/check_port.sh
@@ -1,17 +1,17 @@
 #!/bin/sh
 # Copyright (C) Juewuy
 
-check_port(){
-	if [ "$1" -gt 65535 -o "$1" -le 1 ]; then
-		echo -e "\033[31m输入错误！请输入正确的数值(1-65535)！\033[0m"
-		return 1
-	elif [ -n "$(echo "|$mix_port|$redir_port|$dns_port|$db_port|" | grep "|$1|")" ]; then
-		echo -e "\033[31m输入错误！请不要输入重复的端口！\033[0m"
-		return 1
-	elif [ -n "$(netstat -ntul | grep -E ":$1[[:space:]]")" ]; then
-		echo -e "\033[31m当前端口已被其他进程占用，请重新输入！\033[0m"
-		return 1
-	else
-		return 0
-	fi
+check_port() {
+    if [ "$1" -gt 65535 ] || [ "$1" -le 1 ]; then
+        echo -e "\033[31m输入错误！请输入正确的数值(1-65535)！\033[0m"
+        return 1
+    elif echo "|$mix_port|$redir_port|$dns_port|$db_port|" | grep -q "|$1|"; then
+        echo -e "\033[31m输入错误！请不要输入重复的端口！\033[0m"
+        return 1
+    elif netstat -ntul | grep -q ":$1[[:space:]]"; then
+        echo -e "\033[31m当前端口已被其他进程占用，请重新输入！\033[0m"
+        return 1
+    else
+        return 0
+    fi
 }