Script to establish telnet connection and output results to text file

Posted on 2007-11-19
Medium Priority
Last Modified: 2008-02-01
I'm looking to create a script that will do the following:

Connect to several devices (one by one) via telnet, send a couple of commands and save *only* the output of 'status line x' and 'detail line x' to a text file.

To give a better idea, this is what the telnet connection looks like:


--welcome message --
password prompt > ****** ('password' should be entered by the script)

prompt > status (this 'status' command should be sent by the script)

--status line 1--
--status line 2--
--status line 3--
--status line 4--

prompt > showdetail (this 'showdetail' command should be sent by the script)

--detail line 1--
--detail line 2--
--detail line 3--

prompt > exit


In the end the output text file should look something like this:


device ip:
status line 1
status line 4
detail line 3

device ip:
status line 1
status line 4
detail line 3

Question by:impersonator
LVL 38

Accepted Solution

Shift-3 earned 2000 total points
ID: 20316118
I'm fairly certain there is no built-in way to do this in Windows (though if there is I'd love to hear about it).

However it should be possible to do it using the free client PuTTY.

It includes a command-line tool called Plink which supports batch scripting.

Author Comment

ID: 20637050
I had already found plink before posting :o).  I ended up using a batch script that calls Expect (http://expect.nist.gov/) + plink to connect to the telnet server then saves the output to a temporary text file which later gets parsed to create the output I want.


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