Login script

Paul77 · 02-05-2007, 07:31 AM

Hi,
I am trying to write a bash login script for
Montavista Linux. I copied one from off the net:-

#!/bin/bash

read parameter1

spawn ssh pblades@smokey

# Look for password prompt
expect "*?assword:*"
# Send password aka $password
send -- "$parameter1\r"
# send blank line (\r) to make sure we get back to gui
send -- "\r

but the line,

spawn ssh pblades@smokey

and in fact any use of spawn is rejected as
an unknown command.

Does anyone know why this might be and if there
is an alternative?

Thanks
Paul

TB0ne · 02-05-2007, 08:00 AM

Could be two reasons:

Spawn isn't installed, or isn't in your path. As super-user, run this:

find / -name spawn

It'll chew for a while, then (if spawn is found), tell you where it is. You can either specify the entire path in the login script, or you can modify your PATH environment variable to put spawn in a place where it's found.

If it's not installed, you'll have to install it if you want to use it.

colucix · 02-05-2007, 08:01 AM

From this post it is not very clear what you are trying to do, however the script looks like an expect piece of code. Indeed, spawn is not a linux command by itself, but you have to install expect in order to run this kind of script.

Paul77 · 02-05-2007, 01:02 PM

I don't appear to have spawn on the system - do you know
where to download it from?

Paul

Paul77 · 02-05-2007, 02:50 PM

Re: what is the script trying to do

The script is intended to carry out a login via
ssh pblades@smokey
and send a stored password back to complete the
login (it will then go onto set a clear case view and source my .bash_profile)

rgds
Paul

colucix · 02-06-2007, 12:05 AM

Quote:

Originally Posted by Paul77

I don't appear to have spawn on the system - do you know
where to download it from?

I don't know what Montavista Linux uses... but look for expect in its software installation tool.

Paul77 · 02-06-2007, 06:43 AM

Hi,
I have changed the script so it does not do the ssh login line
in background (& removed) but it now simply prompts the
user for the password. Running the script in debug (bash -x <script>) the expect "....password:" line after the ssh is not
being carried out.

PB

Paul77 · 02-07-2007, 11:38 AM

Hi,
the problem appears to be that there is no spawn program
on Montavista linux does anyone know where it can be downloaded
from and if its then safe to use?

PB

colucix · 02-07-2007, 03:03 PM

Yeah... we already pointed it out. Spawn is a command coming from expect. See the link I have posted above. I have no knowledge about Montavista and what kind of software installer it uses, but for sure you can figure out how to accomplish this task. Last chance: install from source after downloading it from the expect site.