SSH 脚本 二次认证

#!/bin/bash

#SSH Auth 2015-06-19

trap "" HUP INT QUIT TSTP
clear
sleep 0.5
echo -e "...................$(date) Login Server..............\n"
export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

num="1"
max="3"

Lock() {
    for i in {1..5};do
        echo -e "..................${i}......................\n"
        sleep 2;
    done
}

NUM_MAX() {
    if [[ $num > 3 ]];then
        Lock
    fi
}

while true;do
        NUM_MAX
        read -p "please input user:" user
        if [[ $user == "root" ]];then
            echo "user auth success!"
        else
            echo "user auth fail."
                num=`expr $num + 1`
            continue
        fi

        read -p "please input pass:" pass

            if [[ $pass == "12345" ]];then
                    echo "pass auth success!"
                    break
            else
                    echo "pass auth fail."
                    continue
            fi
done
trap : HUP INT QUIT TSTP