[SOLVED] shell script for entering login and password

[adityakavoor]

I need to write a shell script for renewing the IP address on my modem.

These are the steps :

1 . telnet 192.168.1.1

2. login : foo (say)
3. password: foo (say)

4. pppoe set transport 1 disabled

5. pppoe set transport 1 enabled

How to write a script which automatically enters the login and

password and executes the 2 commands ??

I dont want to enter the login and password every time ..


Please help ...

[WW]

I haven't used it, but this sounds like a job for expect (http://en.wikipedia.org/wiki/Expect). Check out the first example on the wikipedia page. (See also the expect home page (http://expect.nist.gov/).)

[adityakavoor]

Thanks , Will give a try

[scruff]

Expect is really simple. I write a lot of automated login-do-something scripts at work though and I prefer Perl with Net::Telnet (http://search.cpan.org/~jrogers/Net-Telnet-3.03/lib/Net/Telnet.pm).

[supirman]

Here ya go. See if this works for you.



#!/usr/bin/env expect

set username yourUserNameHere
set pass yourPasswordHere
set host theIpAddressToConnectTo

spawn telnet ${host}

expect -re "login:"
send "${username}\r"

expect "Password:"
send "${pass}\r"

expect -re "$"

send "pppoe set transport 1 disabled\r"
expect -re "$"
send "pppoe set transport 1 enabled\r"

expect -re "$"
send "exit\r"
expect eof




Put that into a file, say renew_ip. Give it execute permissions: chmod +x renew_ip . Then run it: ./renew_ip

Also, if you don't have expect, just: sudo apt-get install expect

[adityakavoor]

supirman :popcorn:

Thanks a lot. Works like a charm. :) :)

But I get an error message at the end, but I dont think it has any relevence .


Syntax error - use '?' to see valid completions

This error doesnt matter to me as I get the job done.

Thanks again . :guitar: