#!/bin/sh
# Copyright (C) Juewuy

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
}