From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id c9da55c6 for ; Fri, 13 Sep 2019 15:24:21 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 49A0E9BA0E; Sat, 14 Sep 2019 01:24:20 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id B99169B928; Sat, 14 Sep 2019 01:23:48 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 3DA409B928; Sat, 14 Sep 2019 01:23:46 +1000 (AEST) Received: from mcvoy.com (mcvoy.com [192.169.23.250]) by minnie.tuhs.org (Postfix) with ESMTPS id 9383B9B8FB for ; Sat, 14 Sep 2019 01:23:45 +1000 (AEST) Received: by mcvoy.com (Postfix, from userid 3546) id 1454235E11A; Fri, 13 Sep 2019 08:23:45 -0700 (PDT) Date: Fri, 13 Sep 2019 08:23:45 -0700 From: Larry McVoy To: Peter Jeremy Message-ID: <20190913152344.GW2046@mcvoy.com> References: <20190911181101.GF3143@mcvoy.com> <20190912034346.GJ2046@mcvoy.com> <20190912043145.GA12480@mcvoy.com> <20190913041117.GR2046@mcvoy.com> <20190913080009.GG88690@server.rulingia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190913080009.GG88690@server.rulingia.com> User-Agent: Mutt/1.5.24 (2015-08-30) Subject: Re: [TUHS] [SPAM] Re: SCCS X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: The Eunuchs Hysterical Society Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On Fri, Sep 13, 2019 at 06:00:09PM +1000, Peter Jeremy wrote: > On 2019-Sep-13 15:54:32 +1000, Dave Horsfall wrote: > >On Thu, 12 Sep 2019, Larry McVoy wrote: > >> But here is an SCCS win. SCCS has a 16 bit ignore the carry bit > >> checksum over the whole file. RCS has none of that. > > > >Giggle... I found I could actually *edit* an SCCS file, provided I reset > >the checksum to zero (it was then recalculated). > > I think that was deliberate. ISTR editing SCCS files and repairing the > checksum as well, though I don't recally exactly how. bk admin -z file.c and I'm pretty sure that is sccs compat. > >> B) NFS errors. So all NFS implementations, Suns included, had a bad > >> habit of returning a block of nulls. I dunno why but that is a thing. > >> The SCCS checksum would detect that. RCS and CVS did not have a > >> checksum so when NFS returned garbage, they were happy to return that to > >> you. > > > >I believe that NFS is much more reliable now (yes, it used to be awful). > > NFS ran much faster when you turned off the UDP checksums as well. > (Though there was still the Ethernet CRC32). Living dangerously.