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Date: Fri, 27 Sep 2002 00:20:03 -0700 (PDT)
Message-Id: <200209270720.g8R7K3Ag018946@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
Cc: 
From: Maxim Konovalov <maxim@macomnet.ru>
Subject: Re: misc/41792: lseek after ftruncate fails
Reply-To: Maxim Konovalov <maxim@macomnet.ru>
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The following reply was made to PR misc/41792; it has been noted by GNATS.

From: Maxim Konovalov <maxim@macomnet.ru>
To: bug-followup@freebsd.org
Cc:  
Subject: Re: misc/41792: lseek after ftruncate fails
Date: Fri, 27 Sep 2002 11:19:46 +0400 (MSD)

 Add to the audit trail.
 
 ---------- Forwarded message ----------
 Date: Thu, 26 Sep 2002 15:53:34 -0700 (PDT)
 From: yury izrailevsky <izrailev@yahoo.com>
 To: Maxim Konovalov <maxim@FreeBSD.org>
 Subject: Re: misc/41792: lseek after ftruncate fails
 
 I was wrong -- it doesn't fail locally. Consistently
 fails over an NFS mount though.
 
 Privet.
 I-Opa
 
 --- Maxim Konovalov <maxim@FreeBSD.org> wrote:
 >
 > Hello,
 >
 > [...]
 > > >Environment:
 > > FreeBSD 4.6.1-RELEASE-p10
 > > >Description:
 > >       File operation problem. Running the
 > following:
 > >
 > > write(fd, buffer, 8K);
 > > ftruncate(fd, 0);
 > > write(fd, buffer, 1);
 > > off = lseek(fd, 0, SEEK_END);
 > > printf("%d", off);
 > >
 > > Output: 24576, expected: 1.
 >
 > Can't reproduce on 4.6-STABLE:
 >
 > $ uname -a
 > FreeBSD golf.macomnet.net
 > 4.6-20020805-MACOMNET-STABLE FreeBSD
 > 4.6-20020805-MACOMNET-STABLE #19: Fri Sep 20
 > 17:09:52 MSD 2002
 > maxim@golf.macomnet.net:/usr/obj/usr/src/sys/GOLF
 > i386
 > $ rm test.file
 > $ ./trunc
 > file offset=1, expected 1
 > $ ls -l test.file
 > -rw-r--r--  1 maxim  staff  1 23 ΣΕΞ 13:55 test.file
 > $
 >
 > > The size of the actual file is 1 (if you ls -l on
 > it). However,
 > > lseek goes way past it...
 > >
 > > Noticed this while running connectathon rewind
 > test (part of special
 > > test suite). But fails even if don't go over NFS
 > but just run on the
 > > local file system.
 > >
 > > I suspect the problem is with the FS cache. Or
 > perhaps lseek and/or
 > > ftruncate are just broken...
 >
 > [...]
 >
 > --
 > Maxim Konovalov, maxim@FreeBSD.org
 >
 >
 
 
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