Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!samsung!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.windows.x
Subject: Re:  /dev/ptmx, granpt(), ptsname() etc .. HELP
Message-ID: <3926@auspex.auspex.com>
Date: 21 Aug 90 21:09:19 GMT
References: <9008201546.AA01125@erik.uucp>
Organization: Auspex Systems, Santa Clara
Lines: 17

>I found some info in the Prentice-Hall System V Release 4 volume titled
>something like "Streams Programmer's Guide."  This included some stuff on
>pushable modules for line disciplines as well as basic info on the 
>pseudo-tty ptmx/pts* master-slave pairs. ... rb

Note that not all the stuff mentioned in there exists in S5R3.

(Also note that the reason this is used for client/server communication
in X is "it's there" - i.e., it's being used as the closest replacement
for UNIX-domain sockets.  S5R4 has UNIX-domain sockets, as well as a
"local transport" in TLI; I don't know which, if any, of those are going
to be the "standard" mechanism used for connecting to a local X server. 

Then again, the standard programmatic interface to X in the ABI, if
there is one, may be through a dynamically-linked library, so that the
standard is "call XOpenDisplay, etc." rather than "make a connection
using this mechanism.")