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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.unix,net.unix-wizards
Subject: Re: System V communication facilities query
Message-ID: <11291@brl-tgr.ARPA>
Date: Mon, 17-Jun-85 20:56:51 EDT
Article-I.D.: brl-tgr.11291
Posted: Mon Jun 17 20:56:51 1985
Date-Received: Sun, 23-Jun-85 06:39:32 EDT
References: <243@dcl-cs.UUCP>
Organization: Ballistic Research Lab
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> Can anyone feed me some information on the interprocess communication 
> facilities that are available with System V - ie what is the equivalent of
> the BSD 4.2 socket on Sys V? I believe there exists an equivalent facility,
> called "streams", but that's about as much as I know.

Currently available releases of UNIX System V have the following:
	- FIFOs (named pipes)
	- semaphores
	- shared memory regions
	- message-passing
None of these are equivalent to sockets (and vice-versa).

Stream I/O is a nifty invention of Dennis Ritchie that is not yet
generally available.  It is expected to appear in future releases
of both UNIX System V and 4.nBSD.  Streams are not sockets either,
but they do provide the foundation for nice networking implementations.