Date: Fri, 27 Sep 2002 00:20:03 -0700 (PDT) From: Maxim Konovalov <maxim@macomnet.ru> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/41792: lseek after ftruncate fails Message-ID: <200209270720.g8R7K3Ag018946@freefall.freebsd.org>
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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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