exit command in telnet

I'm using telnet from a command prompt under WinXP to connect to an embedded 
linux target. Part of the target boot sequence involves initiating an exit 
from a startup shell, by entering 'exit <enter>'. Telnet interprets this as 
terminating the telnet session, the command window returns to a C: prompt. 
Is there a way that I can get the session to just pass the exit command 
through and hang in? TIA 

On 14/02/2012 08:31, Bruce Varley wrote:
> I'm using telnet from a command prompt under WinXP to connect to an embedded
> linux target. Part of the target boot sequence involves initiating an exit
> from a startup shell, by entering 'exit<enter>'. Telnet interprets this as
> terminating the telnet session, the command window returns to a C: prompt.
> Is there a way that I can get the session to just pass the exit command
> through and hang in? TIA
>

Like many of Window's command line programs, its telnet client is 
somewhat limited - have you tried alternative clients?  If you have a 
Linux machine you can use that.  On Windows you could try msys telnet 
client (I find Windows unusable until msys is installed to give proper 
command-line tools), or Tera Term Pro (which is an excellent serial 
terminal emulator, telnet client and ssh client), or perhaps Putty (also 
telnet and ssh).


<http://www.mingw.org/wiki/MSYS>
<http://ttssh2.sourceforge.jp/index.html.en>
<http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html>


I can't say for sure whether that will fix your problem - but if these 
/real/ telnet clients can't help you, nothing will (short of writing 
your own telnet client).

On Tue, 14 Feb 2012 15:31:17 +0800, "Bruce Varley" <bv@NoSpam.com>
wrote:

>I'm using telnet from a command prompt under WinXP to connect to an embedded 
>linux target. Part of the target boot sequence involves initiating an exit 
>from a startup shell, by entering 'exit <enter>'. Telnet interprets this as 
>terminating the telnet session, the command window returns to a C: prompt. 
>Is there a way that I can get the session to just pass the exit command 
>through and hang in? TIA 


Like many command line telnet clients, if you specify the host on the
command line, when the host disconnects, the default response is to
terminate the telnet program as well.  Some telnet clients allow you
to override that behavior, but the one in Windows is fairly basic.

OTOH, if you run it in command mode (just "telnet"), and then
explicitly open the session ("o hostname"), after the host disconnects
the telnet client will remain active, waiting for another command.

But if your requirement is having the terminal session itself remain
after the "exit", the problem is that it's actually being disconnected
by the host.  Some more sophisticated telnet clients support automatic
logons, and automatic session reconnection, and others allow scripting
(where you could reconnect the session after it disconnects).

On Tue, 14 Feb 2012 15:31:17 +0800, Bruce Varley scribbled:

> I'm using telnet from a command prompt under WinXP to connect to an
> embedded linux target. Part of the target boot sequence involves
> initiating an exit from a startup shell, by entering 'exit <enter>'.
> Telnet interprets this as terminating the telnet session, the command
> window returns to a C: prompt. Is there a way that I can get the session
> to just pass the exit command through and hang in? TIA

I find, using the simple client provided by Microsoft, that if you DON'T 
specify the host name/IP address on the command line that an exit from 
the target does not cause the client to terminate.

i.e.
telnet
then enter OPEN <hostname> <port>
diddle as needed
exit
and you're back in the telnet client

Regards
-- 
>@<
Bill Dennen			ieee1014@hotmail.com
Of all the things I've lost, I miss my mind the most ...

"Bill Dennen" <ieee1014@hotmail.com> wrote in message
news:jhdroh$dmo$1@speranza.aioe.org...
> On Tue, 14 Feb 2012 15:31:17 +0800, Bruce Varley scribbled:
>
> > I'm using telnet from a command prompt under WinXP to connect to an
> > embedded linux target. Part of the target boot sequence involves
> > initiating an exit from a startup shell, by entering 'exit <enter>'.
> > Telnet interprets this as terminating the telnet session, the command
> > window returns to a C: prompt. Is there a way that I can get the session
> > to just pass the exit command through and hang in? TIA
>
> I find, using the simple client provided by Microsoft, that if you DON'T
> specify the host name/IP address on the command line that an exit from
> the target does not cause the client to terminate.
>
> i.e.
> telnet
> then enter OPEN <hostname> <port>
> diddle as needed
> exit
> and you're back in the telnet client

The Telnet client doesn't do zip with the 'exit' command but the host does:
it terminates the connection, which in turn makes Telnet either exit or go
back to its own command prompt, depending on how you invoked telnet as Bill
says.

Meindert