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From: guy@sun.uucp (Guy Harris)
Newsgroups: net.unix-wizards
Subject: Re: 'dbm' hash table software
Message-ID: <5339@sun.uucp>
Date: Tue, 22-Jul-86 14:17:28 EDT
Article-I.D.: sun.5339
Posted: Tue Jul 22 14:17:28 1986
Date-Received: Thu, 24-Jul-86 00:24:43 EDT
References: <5728@think.COM> <385@nike.UUCP> <5273@sun.uucp> <etc> <1316@sq.UUCP>
Organization: Sun Microsystems, Inc.
Lines: 34

> AT&T (USG) never got a copy (of "dbm") from Bell, since System III -> V
> -> Vr2 -> \(if doesn't come from V7, but from V6. (I think we've been
> over this before; apologies to those who've heard it before :=) )

If UNIX/TS 1.0 -> PWB/UNIX 2.0 -> UNIX 3.0 -> UNIX 3.0.1 (S3) -> ... came
from V6, how come it has:

	1) The V7 file system

	2) The V7 "stat" structure

	3) The V7 "lseek" system call

	4) Environment variables

	5) The Bourne shell

etc., when V6 had *none* of those?  The USG/USDL UNIX series came from a
UNIX somewhere between what was sent out the door as V6 and what was sent
out the door as V7; it was closer to V7 than to V6, though.  (The fact that
it lacked "dbm" and a few other things is hardly as important as the fact
that it had the V7 features listed above.)

I'm not sure what you mean by "AT&T" and "Bell" here.  It's not relevant,
though; the Research group that did V6, V7, etc. and the USG/USDL that did
S3, S5, etc. were both part of Bell Laboratories, so they *could* have
gotten a copy of "dbm" if they'd wanted to.  The pipeline between Research
and USG/USDL was less than smooth (consider that a bug in "fgrep", fixed in
an addendum to V7, is *still* not fixed in S5!), but it could conceivably
have been made to flow better.
-- 
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com (or guy@sun.arpa)