Subject: Re: /dev/cuaXX & other things
To: None <>
From: Michael Graff <>
List: current-users
Date: 12/21/1994 22:33:34
Does Ultrix have one device, but has a non-exclusive mode where something can
be ``locked out'' when something else wants to use it?

getty opens /dev/tty00.  Set non-exclusive mode.

cu opens dev/tty00, without setting non-exclusive mode.  The kernel ignores
getty's connection now, and cu owns the port, until done.  Then getty
gets it back.

I could be way wrong here, but...  ;)