From: utzoo!henry Newsgroups: net.unix-wizards Title: Re: Dialing in and out (line turn around) Article-I.D.: utzoo.2489 Posted: Thu Sep 23 19:58:53 1982 Received: Thu Sep 23 19:58:53 1982 The scheme that Bob Van Valzah discusses works fine. We have been running an essentially-identical setup, invented independently earlier this year, for several months. There is one thing you must watch, however: having two /dev entries sharing a tty structure and a physical device can lead to problems with initializing and finalizing the structure and the line. Not unsolvable, but it needs to be thought through carefully. Also, the V7 tty.c does a few unfriendly things here and there like zeroing the tty flags field on close -- not good if you have another process waiting for the device! Easy to work around but you must be aware of the problem. Henry Spencer U of Toronto