Shell script successful telnet login, how to issue commands after that?

Question

#!/usr/bin/expect -f
spawn telnet 10.21.0.17
expect -re "login"
send "admin\n"
expect -re "Password"
send "supersecurepassword\n"
interact

works as expected. Upon running the script I am logged in to whatever telent IP I used in the line spawn telnet 10.21.0.17

Then it drops me to the Shell of the AP

WAP->

How do I issue further commands? I'd like to issue reboot and then maybe a sleep 20 and finally exit.

I have tried using echo and expect with no success. I've also tried with removing the interact with no success. Any ideas?

Solution

This was resolved by simply adding a sleep before the expect, and of course not including interact, the following works well:

#!/usr/bin/expect -f
spawn telnet 10.21.0.17
expect -re "login"
send "admin\n"
expect -re "Password"
send "supersecurepassword\n"
sleep 5
expect "WAP"
send "reboot\n"
send "exit\n"

For reference, this was used to automate a reboot on a D-Link DAP-2590 wireless access point. Now that I know this though, I may use it for other things: changing passwords, etc. Hope it helps someone else in the future.

Comments

[Dmitry]

Why did you need sleep command in this script before expect?