交互式转化批处理工具 expect

交互式转化批处理工具 expect

expect中相关命令

• spawn 启动新的进程
• expect 从进程接收字符串
• send 用于向进程发送字符串
• interact 允许用户交互
• exp_continue 匹配多个字符串在执行动作后加此命令

例一

#!/usr/bin/expect
spawn scp /tmp/123.txt umpay@192.168.10.200:/tmp
expect {
  "yes/no" {send "yes\n";exp_continue}
  "password" {send "password\n"}
}
expect eof
[umpay@localhost ~]$ ./a.exp

例二

#!/usr/bin/expect
spawn ssh 1192.168.10.200
expect {
  "yes/no" {send "yes\n";exp_continue}
  "password" {send "password\n"}
}
interact

例三 expect变量

#!/usr/bin/expect
set ip 1192.168.10.200
set user umpay
set password password
set timeout 10
spawn ssh $user@$ip
expect {
  "yes/no" {send "yes\n";exp_continue}
  "password" {send "$password\n"}
}
interact

例四 expect位置参数

#!/usr/bin/expect
set ip [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]
spawn ssh $user@$ip
expect {
  "yes/no" {send "yes\n";exp_continue}
  "password" {send "password\n"}
}
interact
[umpay@localhost ~]$ ./d.exp 1192.168.10.200 umpay password

例五 expect 执行多个命令

#!/usr/bin/expect
set ip [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]
set timeout 20
spawn ssh $user@$ip
expect {
  "yes/no" {send "yes\n";exp_continue}
  "password" {send "$password\n"}
}
expect "]#" {send "echo 'root1'\n"}
expect "]#" {send "echo 'root2'\n"}
send "exit\n"
expect eof

例六 shell脚本调用expect

#!/bin/bash
ip=$1
user=$2
password=$3
expect <<EOF
set timeout 20
spawn ssh $user@$ip
expect {
  "yes/no" {send "yes\n";exp_continue}
  "password" {send "$password\n"}
}
expect "]#" {send "echo 'ssh root1'\n"}
expect "]#" {send "echo 'ssh root2'\n"}
expect "]#" {send "exit\n"}
expect eof
EOF