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expect 命令脚本语言实战

一.expect 实现自动填入密码

1.vi ssh.exp.201

#!/usr/bin/expect

spawn ssh -p 20000 oldboy@192.168.1.201 /sbin/ifconfig eth0
set timeout 60
expect "*password:"
send "abcdef\n"
expect eof
exit


2.chmod 700 ssh.exp.201  #注。要是没有权限执行,也可以直接expect,700权限。防止其它用户查看脚本中的密码

3.执行效果:

 ./ssh.exp.201  
spawn ssh -p 20000 oldboy@192.168.1.201 /sbin/ifconfig eth0
oldboy@192.168.1.201‘s password:
eth0      Link encap:Ethernet  HWaddr 00:0C:29:31:2B:A0  
          inet addr:192.168.1.201  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2417 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2419 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:229270 (223.8 KiB)  TX bytes:186485 (182.1 KiB)



wKiom1Q53I2gUTofAAHJJrbJAJk672.jpg二.expect语法:

wKiom1Q53smxC-TsAAM4w78gTts738.jpg

wKioL1Q54XvDcqY7AALKBDCJFZY215.jpg


exp_continue 的原理,当要提示输入时,进行匹配,当匹配成功,重新进入expect,有点象for 循环中的continue,要是没有exp_continue的话,则expect中的内容,只会对一次输入匹配一次,不论你有几个关键字

论证:

#!/usr/bin/expect

spawn ssh -p 20000 oldboy@192.168.1.201 /sbin/ifconfig eth0
set timeout 60
expect {
  -timeout 60
  "yes/no"      {exp_send "yes\r"; exp_continue}
  "*password:"  {exp_send "abcdef\r"}
  timeout {puts "expect was time out "; return}
}

expect eof
exit


wKioL1Q53_HBlODaAAR-QmCVbOA152.jpg

本文出自 “蜘蛛侠” 博客,请务必保留此出处http://txidc.blog.51cto.com/9138217/1562807

expect 命令脚本语言实战