expect telnet issue

[Lonni J Friedman]

On 10/15/07, Vu Pham <vu at sivell.com> wrote:
> On Mon, 2007-10-15 at 12:08 -0700, Lonni J Friedman wrote:
> > On 10/15/07, Vu Pham <vu at sivell.com> wrote:
> > > On Mon, 2007-10-15 at 11:31 -0700, Lonni J Friedman wrote:
> > > > Greetings folks,
> > > > I've got a few expect scripts that I'm trying to use to automate
> > > > telnet logins on some remote power switches.  The expect scripts work
> > > > perfectly on their own, but I want/need to create a wrapper for them
> > > > so that they're all unified through a single script.  When I call the
> > > > expect script via a wrapper bash script, it no longer works.  I get as
> > > > far as the "spawn telnet foo.com" command, and then it just stalls
> > > > without ever sending the username/password jazz.
> > > >
> > > > I'm guessing that some kind of env variable isn't getting passed
> > > > somewhere, but I can't figure out what.
> > > >
> > > > Anyone have any ideas on what might be going wrong?
> > >
> > > Lonnie,
> > >
> > > Below is my test script ( I use it for my real ftp, but just tried with
> > > telnet and it seems working )
> > >
> > > #!/usr/bin/expect
> > > system "date"
> > > spawn telnet 192.168.249.214
> > > set timeout 600
> > > expect {
> > >         timeout { puts "timed out when spawning telnet"; exit }
> > >         "connection refused" exit
> > >         "ogin:"
> > > }
> > > send "vu\r"
> > > expect "ssword:"
> > > send "mypassword\r\r"
> > > expect "~]$"
> > > ## script ends
> > >
> > >
> > > Here is the output when I ran it.
> > >
> > > vu at coh2:~/telework/sh-scripts> ./a.sh
> > > Mon Oct 15 14:11:15 CDT 2007
> > > spawn telnet 192.168.249.214
> > > Trying 192.168.249.214...
> > > Connected to 192.168.249.214.
> > > Escape character is '^]'.
> > > Fedora release 7 (Moonshine)
> > > Kernel 2.6.21-1.3194.fc7 on an i686
> > > login: vu
> > > Password:
> > > Last login: Mon Oct 15 13:50:32 from 192.168.249.28
> > > [vu at o ~]$
> > >
> >
> > Thanks Vu.  What is in your a.sh ?
> >
> > When I  have just the following, I still get a hang at the telnet
> > Username prompt:
> >
> > #!/bin/bash
> > ./cuda-power0.exp
> >
> a.sh has the script at the beginning of my email.

ohh, so you named your expect script a.sh ?  That's not quite the same
as I'm doing.

>
> Do you mean that cuda-power0.exp runs fine if you run it manually, and
> do not run under thar wrapper ?

Exactly.

However, I've got some late breaking news.  Looks like my problem
might be specific to the power switch i'm using.  I just tested
against a random internet telnet server, and that works.

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
L. Friedman                                    netllama at gmail.com
LlamaLand                       https://netllama.linux-sxs.org