[wplug] Bash Expect usage - Automating telnet

[Pat Barron]

I'm not particularly familiar with expect, myself, but if your script is 
literally as you have indicated below, it has some quoting problems.  I 
tried the script (as written below) and get the same failure.  The 
script gets further after fixing the double-quotes on line 6 and line 7, 
escaping the double-quotes (putting a '\' character in front of them, as 
you've done later in the script with the subsequent expect functions).

I can't test it too much more than this, since I was doing my testing on 
a Windows system under Cygwin (without the Cygwin "telnet" client 
installed), and because these days I can't really think of anything I 
can actually telnet to.  ;-)

--Pat.

On 5/12/2014 9:26 AM, scoob8000 wrote:
> ssh isn't an option since these are just low end devices.  They only
> support telnet or http.
>
> I can't even get it to spawn the telnet session, I'm sure it's something
> simple in my syntax that I'm missing.
>
> Here's what I get:
> missing close-bracket while executing "if [catch spawn"
> couldn't read file "telnet": no such file or directory
>
> I'll take a look at autoexpect.
>
>
> On Fri, May 9, 2014 at 3:43 PM, G.Pitman <gpitman at gmail.com> wrote:
>
>> You could give autoexpect a try
>>
>> http://linux.die.net/man/1/autoexpect
>>
>>
>> On Thu, May 8, 2014 at 8:09 AM, scoob8000 <scoob8000 at gmail.com> wrote:
>>
>>> So I've never used expect before and I'm really struggling.   I'm
>>> trying to come up with a script to telnet into a bunch of devices, run
>>> a few commands then log it.
>>>
>>> I'm eventually going to have it read a list of IP's, and using the
>>> exit status of the telnet put the IP address in either a pass.txt or
>>> fail.txt logfile.   That part I should be able to figure out.
>>>
>>> Here's what I have now based off of some examples I found online.
>>>
>>> I think I'm missing something pretty simple here, but I'm stumped.  :)
>>>
>>>
>>> #!/bin/bash
>>> host=$1
>>> export HISTIGNORE="expect*";
>>> expect -c "
>>> set timeout 20
>>> if [catch "spawn telnet $host" reason] {
>>> send_user "failed to spawn program: $reason\n"
>>> exit 1
>>> }
>>>
>>> expect \"Password:\"
>>> send \"oldpasswordr\"
>>> expect \"Router>\"
>>> send \"sys password newpassword\"
>>> expect \"save ok, new password saved...\"
>>> send \"sys cur2def\r\"
>>> expect \"OK"\"
>>> send \"exit\r\"
>>> expect eof"
>>> export HISTIGNORE="";
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