Shell Programming and Scripting

I have a process that is running locally on the machine.

When you telnet to the process: telnet IP port, it automatically returns a string which shows the status of that process.

Something like this:

[user@Server]# telnet IP Port
Trying 127.0.0.1...
Connected to localhost (127.0.0.1).
Escape character is '^]'.
LONGSTRINGOFSTUFF

I want to do grab the info in LONGSTRINGOFSTUFF in a script. Any thoughts?

See the following command

Code:

telnet IP PORT  2>file_name

[user@Server]# telnet IP Port
Trying 127.0.0.1...
Connected to localhost (127.0.0.1).
Escape character is '^]'.
LONGSTRINGOFSTUFF

The informations print in STDOUT and STDERR
so I redirect the STDERR only to the file,
(it will redirect the "LONGSTRINGOFSTUFF" into file)

hmmm this doesn't seem to work. It basically creates the file with this:

Trying 127.0.0.1...^M
Connected to localhost (127.0.0.1).^M
Escape character is '^]'.^M


Which has everything except for the information I need.

I am thinking there is probably a way to grab the output of the telnet with the expect command, which I know little to nothing about.

Option 1: Tail the telnet

Code:

$ telnet localhost daytime 2>/dev/null | tail -1
18 MAR 2010 14:33:30 CET

Option 2: Use netcat

Code:

$ netcat localhost daytime
18 MAR 2010 14:33:36 CET

Note: these 2 examples were recorded on a Linux machine