expect使用小结

最新推荐文章于 2025-11-30 14:17:11 发布

原创最新推荐文章于 2025-11-30 14:17:11 发布 · 230 阅读

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1）使用expect命令在shell脚本中实现的简单登陆

#!/bin/bash
#!/usr/bin/expect -f

if [ $# != 3 ];then
    echo "Usage: cmd [host] [user] [passwd]"
fi

host=$1
user=$2
password=$3

echo
echo $user@$host
echo

#eof {exit 0}
auto_ssh_copy_id ()
{
    expect -c "set timeout -1;
        spawn ssh $2;
        expect
        {
            "*yes/no" {send "yes\r"; exp_continue}
            "*password:" {send "$1\r"}
        };
        interact
    "
}

#auto_ssh_copy_id $password $user@$host

set ip [lindex $argv 0 ]
set password [lindex $argv 1 ]
set timeout 10
spawn ssh root@$ip
    expect {
        "*yes/no" { send "yes\r"; exp_continue}
        "*password:" { send "$password\r" }
    }
interact

exit 0

2）expect脚本简单使用(*.exp 脚本)

#!/usr/bin/expect -f

set ip 192.168.2.101
set password "321"

spawn ssh root@$ip

expect {
     "*yes/no" {send "yes\r"; exp_continue}
     "*password:" {send "$password\r" }
}

expect "#*"
send "passwd\r"

expect {
    "Enter*" { send "123\r"; exp_continue}
    "Retype*" { send "123\r"; exp_continue}
}

send "exit\r"
expect eof

exit

3）自动登陆shell代码段

……

auto_ssh_login ()
{
    expect -c "
        set timeout 5

        spawn sshpass -p $2 ssh -o StrictHostKeyChecking=no -p 39000 root@$1

        send "passwd\\r"
        
        expect {
            Enter* {send -- $3\r; exp_continue}
            Retype* {send -- $3\r; exp_continue}
        }

        send "exit\\r"
        expect eof
    "
}

……

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