expect自动登录脚本

expect

在使用expect时&＃xff0c;基本上都是和以下四个命令打交道&＃xff1a;
spawn&＃xff1a;用来启动新的进程
send:向进程发送字符串
expect:从进程接受字符串
interact&＃xff1a;主要用于退出自动化&＃xff0c;进入人工交互

问题脚本

#!/bin/bash
read -p "what is your name:" NAME
read -p "How old are you:" AGE
read -p "which object:" OBJ
read -p "Are you OK:" OK
echo $NAME is $AGE is old study $OBJ feel $OK


应答脚本
auto_answer.sh

#!/usr/bin/expect
set timeout 1
##通过索引的方式获取所传的参数
set NAME [ lindex $argv 0 ]
set AGE [ lindex $argv 1 ]
set OBJ [ lindex $argv 2 ]
set FEEL [ lindex $argv 3 ]
##监控的问题脚本
spawn /mnt/expect.sh
##向问题脚本发送参数
expect {
"name" { send "$NAME\r";exp_continue }
"old" { send "$AGE\r";exp_continue }
"objective" { send "$OBJ\r";exp_continue }
"ok" { send "$FEEL\r" }
}
expect eof


auto_answer.sh zx 23 123 happy

脚本练习&＃xff1a;自动连接目标主机当目标主机网络不通时报错

vim auto_ssh.sh

#!/usr/bin/expect
##通过索引的方式获取所传的参数
set ip [ lindex $argv 0 ]
set password [ lindex $argv 1 ]
##开启一个进程
spawn ssh root&＃64;$ip
expect {"yes/no" { send "yes\r"; }"password" { send "$password\n" }
}
#持久连接远程服务器
interact


auto_ssh.sh ip password