[nzlug] How to run scipts in telnet?

[Michael Field]

Hi Raimund,

Timing... it is all in the timing... If the process feeding the data
into the telnet session dies before the session has finished its work
the program will be 'hung up' (sent UNIX signal 1, most likely killing
the job

Try this:

#!/bin/bash
(
  sleep 1
  echo username
  sleep 1  
  echo password
  sleep 3
  echo 'echo "Hi, I want to run this command"'
  sleep 10
  echo 'exit'
  sleep 2
) | telnet localhost  

If the process is important, just make the sleep times longer than you
could ever conceive that the remote end will take to answer - and even
then grep the output for some indication of success...

Mike

-----Original Message-----
From: nzlug-bounces at linux.net.nz [mailto:nzlug-bounces at linux.net.nz] On
Behalf Of Raimund Eimann
Sent: Monday, 25 February 2008 12:20 p.m.
To: NZLUG List
Subject: [nzlug] How to run scipts in telnet?

Hi,

I've got an application that can be accessed via telnet (not a shell). I
would 
like to send some commands (on a regular basis) to that application
through 
the telnet interface. Is there a way to process scripts with telnet?

I've already tried

telnet thehost 2345 < mycommandscript.txt

but that does not seem to work.

There doesn't seem to be a command-line option for this either, at least
I 
didn't find anything promising in the telnet man page.


Cheers,
Raimund

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