expect telnet to multiple cisco devices and execute show run

问题

I have the following scripts which is supposed to pull the IP address from a file device-list.txt and then telnet to the device, login and execute a show run. The script logs in to the device successfully, but gives me an error after that. Any ideas where im going wrong?

for device in `cat device-list.txt`; do ./test4 $device;done

cat test4
#!/usr/bin/expect -f


set hostname [lindex $argv 0]

set user myusername

set pass mypassword

set timeout 10


log_file -a ~/results.log


send_user "\n"

send_user ">>>>>  Working on $hostname @ [exec date] <<<<<\n"

send_user "\n"


spawn telnet $hostname

expect "Username:"

send "$user\n"

expect "Password:"

send "$pass\n"

expect "#"

send “term len 0\n”

send “show running-config\n”

expect “end\r”

send “\n”

send “exit\n”

User Access Verification

Username: myusername
Password:

ROUTER#usage: send [args] string

    while executing

"send “term len 0\n”"

    (file "./test4" line 26)

回答1:

Your problem is due to incorrect double quotes. You have to use double quotes ", not smart quotes “

send “term len 0\n” ; # Wrong 
send "term len 0\r";  # Correct

Note :

Basically, Expect will work with two feasible commands such as send and expect. If send is used, then it is mandatory to have expect (in most of the cases) afterwards. (while the vice-versa is not required to be mandatory)

This is because without that we will be missing out what is happening in the spawned process as Expect will assume that you simply need to send one string value and not expecting anything else from the session.

So, we recommend to use expect after each send, to make sure our commands actually sent to the spawned process. (You have not used expect after sending some commands such as term len 0\r). Also, use \r instead of \n.

来源：https://stackoverflow.com/questions/33383706/expect-telnet-to-multiple-cisco-devices-and-execute-show-run

标签

expect