From: utzoo!decvax!harpo!seismo!rlgvax!guy
Newsgroups: net.unix-wizards
Title: Re: Special versions of execl
Article-I.D.: rlgvax.208
Posted: Sat Apr  9 00:21:48 1983
Received: Sun Apr 10 01:06:44 1983
References: rdin.266

Yup, there are two operating systems that support this; they are called
4.2BSD UNIX, and USG UNIX 5.0 (d/b/a "System V").  10,000 other people
have probably also added shared memory primitives to UNIX (along with
multiple-device spoolers, inter-process message mechanisms, etc.), which
indicates that such a thing probably belonged there early on....  As
more and more people use UNIX for applications more sophisticated than
"grep" and "nroff", you will probably find its functionality grow to
encompass stuff that greasier operating systems did years ago.  It's too
bad that to get the relative cleanliness of UNIX you have to sacrifice
a lot of functionality or add on private extensions.

One of the early USENIX distribution tapes had a shared-memory facility
for V6 UNIX; it didn't happen through "exec" (and most of the others don't
either), but by attaching to and detaching from a shared-memory segment.

					Guy Harris
					RLG Corporation
					{seismo,mcnc,we13}!rlgvax!guy