[NTLUG:Discuss] Scripting help

[Dave Jones]

On Fri, Oct 10, 2014 at 11:06 PM, Leroy Tennison
<leroy.tennison at verizon.net> wrote:
> Well, interesting result, it obviously did telnet to the devices (got Trying
> .., Connected to..., Escape character is ..)  but then "Connection closed by
> foreign host." before ever showing me the login screen (three times, once
> for each device in my list).  BTW, I'm discovering that things which work on
> bash in SuSE 12.2 (bash 4.2.45(1)) don't work on RHEL 5 (bash 3.2.25(1)).
>
> On 10/09/2014 09:13 PM, Christopher Cox wrote:
>>
>> On 09/24/2014 10:24 PM, Leroy Tennison wrote:
>>>
>>> I'm trying to get telnet to repetitively connect to a newline-delimited
>>> list of
>>> devices.  In other words, if I have device1, device2 and device3 then
>>> what I
>>> want is:
>>>
>>> telnet device1
>>> telnet device2
>>> telnet device3
>>>
>> xargs -n1 telnet <<HERE
>> device1
>> device2
>> device3
>> ...
>> deviceN
>> HERE
>>
>>
>>
>>
>> _______________________________________________
>> http://www.ntlug.org/mailman/listinfo/discuss
>>
>
>
> _______________________________________________
> http://www.ntlug.org/mailman/listinfo/discuss

Have  you tried expect?  I have a very complex script that telnet's
into Cisco routers
all over the country and does pings to various places then puts the
output into a CSV
file for easy import into a report spreadsheet.

You may have to do a bit of trial-and-error from the command line with
expect to the
devices but once you get that part figured out, wrap a while loop around it.

while read DEVICE; do
  expect << EOF
    spawn telnet $DEVICE
    expect "Username:"
    send "blah"
    (continue expect commands...)
    send "exit"
    exit
EOF
done < inputfile

inputfile is a list of the devices each on their own line.

Dave