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From: pcn@daimi.aau.dk (Peder Chr. N|rgaard)
Newsgroups: comp.lang.perl
Subject: Re: PL36: Is this a bug ???
Message-ID: <1990Oct23.152150.28029@daimi.aau.dk>
Date: 23 Oct 90 15:21:50 GMT
References: <14380001@hpwad.HP.COM>
Sender: pcn@daimi.aau.dk (Peder Chr. N|rgaard)
Organization: DAIMI: Computer Science Department, Aarhus University, Denmark
Lines: 39

mleiber@hpwad.HP.COM (#Michael Leiber) writes:


>Hi,

>I just applied patches 29 thru 36 to perl(1) and ran the regression tests.
>It looks as though there's a bug, as reported by t/op.read when running
>that test on an nfs mounted file. 

>both machines are running under HP-UX 7.0

>When running the test on the server machine, it works fine, but running
>it on the client fails.

>I think the problem has to be searched within seek/read on unix rather
>than in perl, but I just wanted to report that problem. Unfortunately
>I didn't have the time right know to track it down, so if someone else ...

We tracked that one down long ago, so just to save other people the 
trouble:  This is an error in HP-UX 7.0, NOT in perl.  Your regression
test on perl.3.28 and any earlier version of perl (and HP-UX) would
have provoked the same error.

Larry's regression test tests a rather obscure part of UNIX file semantics
- what happens if you seek far below end of file on a file and
try to read.  It should, of course, fail.  Well, on a HP-UX system
working on an NFS file, it doesn't.  No big problem for anyone,
(I mean, to do that in a program, you would have to commit a logical
programming error first!) but of course one might suggest that Hewlett
Packard ought to correct their NFS code some day.

Greetings
				--peder chr.

--
Peder Chr. Norgaard              ****              pcnorgaard@daimi.aau.dk 
              Computer Science Department,  Aarhus University
               Ny Munkegade 116,  DK-8000 Aarhus C,  DENMARK
phone: +45 86 12 71 88 / telefax: +45 86 13 57 25 / telex: 64767 aausci dk