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From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.unix.wizards
Subject: Re: pseudo terminals
Message-ID: <9191@mimsy.UUCP>
Date: Sun, 1-Nov-87 12:13:07 EST
Article-I.D.: mimsy.9191
Posted: Sun Nov  1 12:13:07 1987
Date-Received: Thu, 5-Nov-87 21:35:39 EST
References: <573@elxsi.UUCP> <682@its63b.ed.ac.uk> <796@quacky.UUCP> <186@aiva.ed.ac.uk>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 18
Keywords: output pagination

In article <186@aiva.ed.ac.uk> richard@aiva.ed.ac.uk (Richard Tobin) writes:
>... What would be really useful would be a device that merely
>passed everything from its slave end to its master end, including
>ioctls.  Ioctls calls at the slave end would (optionally? -
>certainly in the case of GET ioctls) suspend until the master end
>had processed it.

(Any ioctl that receives an answer suspends; hence all ioctls
suspend: every ioctl gets at least a success/fail answer.)

>Has any unix system had such a device?

Version 7's (Greg Chesson's, if I recall aright) multiplexed files
did this.  They had a number of problems, but most of them were due
to the implementation.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris