Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: sockets on sysVr3
Message-ID: <3644@auspex.auspex.com>
Date: 13 Jul 90 17:32:12 GMT
References: <1208@unicorn.WWU.EDU> <70@dlss2.UUCP>
Distribution: usa
Organization: Auspex Systems, Santa Clara
Lines: 16

>	You're probably right, they're NOT THERE!  System V (whatever ver)
>has IPC (inter-process communications) calls not sockets

Wrong answer, next contestant please.

S5R4 *does* have the socket calls; they're implemented atop streams and
TLI.  S5R3, as it comes from AT&T, doesn't have sockets, but it does
have streams/TLI, which occupy pretty much the same ecological niche as
sockets.

Many TCP/IP packages for S5R3 come with a sockets emulation library,
although they probably emulate less of the behavior of sockets than does
the S5R4 emulation code.

The IPC calls do *not* occupy the same niche in most systems; they don't
work over networks.