Hi All,

A day back I install Twisted and Conch on RHEL5. I am a novice user of Twisted software.
I copied an example from dev-shed website (attached herewith). This example script uses conch to talk to a ssh deamon.

This script was able to capture and return the output of simple commands such as - ls, cat etc.
I mean, when I run the script to execute 'ls -al' on a remote machine it does and returns the prompt.

Where as, when I run the script to execute 'tail -f /path/to/mylog.txt' I get the ouput of this command but the prompt never returns.
When I press ^C (Control-C) I get the following run-time error.

Traceback (most recent call last):
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/internet/tcp.py", line 520, in connectionLost
    protocol.connectionLost(reason)
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/conch/ssh/transport.py", line 166, in connectionLost
    self.service.serviceStopped()
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/conch/ssh/connection.py", line 59, in serviceStopped
    map(self.channelClosed, self.channels.values())
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/conch/ssh/connection.py", line 580, in channelClosed
    log.callWithLogger(channel, channel.closed)
--- <exception caught here> ---
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/python/log.py", line 84, in callWithLogger
    return callWithContext({"system": lp}, func, *args, **kw)
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/python/log.py", line 69, in callWithContext
    return context.call({ILogContext: newCtx}, func, *args, **kw)
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/python/context.py", line 59, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/python/context.py", line 37, in callWithContext
    return func(*args,**kw)
File "shankha.py", line 56, in closed
    reactor.stop()
File "/usr/lib/python2.4/site-packages/Twisted-8.2.0-py2.4-linux-i686.egg/twisted/internet/base.py", line 526, in stop
    raise error.ReactorNotRunning(
twisted.internet.error.ReactorNotRunning: Can't stop reactor that isn't running.

I know that 'tail -f' command is expecting "Control-C" or Break to return the prompt on remote host.
But my attempt to send the ^C character is failing..

I am doing somethink like this:

python sshc.py <hostname> 'tail -f mylog.txt ; \x03'

What is the recommended method to adopt such cases?

Cheers!!
Harsha Reddy