xt.c terminal driver source wanted

[Brian Lloyd]

*** REPLACE THIS LINE WITH YOUR MESSAGE ***

I am attempting to hack a UNIX driver that will allow multiple logical user
sessions to communicate via a single physical TTY port.  In my request of
net.unix I have received two replies pointing to a driver called xt.c, 
indicating that it might be a good place to start.  Can anyone provide a
more substantial pointer to this source, or even mail a copy of it to me?
Thank you.
 
Brian Lloyd, WB6RQN
...![bellcore!cp1]!yojna1!wb6rqn