From: Wolf Geldmacher <wolf.geldmacher@abacus.ch>
To: cygwin@cygwin.com
Subject: Re: untarring symlinks with ../ fails randomly
Date: Thu, 30 Jun 2011 15:28:00 -0000 [thread overview]
Message-ID: <1309447688.12904.21.camel@geldmacher-pc> (raw)
In-Reply-To: <4E0C90B2.2060409@cornell.edu>
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On Thu, 2011-06-30 at 11:05 -0400, Ken Brown wrote:
> On 6/30/2011 9:37 AM, Corinna Vinschen wrote:
> > On Jun 30 14:43, Wolf Geldmacher wrote:
> >> Dear all,
> >>
> >> just joining after being hit by an obviously known issue:
> >>
> >> Running tar (in my case to extract openssl-0.9.8r.tar.gz) results in
> >> symbolic links being randomly substituted by zero length mode 0 files as
> >> described in http://sourceware.org/ml/cygwin/2011-04/msg00299.html.
> >>
> >> For me this happens on both Windows 7 and Windows Server 2008.
> >>
> >> The interesting (new?) tidbit:
> >>
> >> In sheer desparation I downgraded from cygwin1.dll/1.7.9.1 to
> >> cygwin1.ddl/1.7.8.1 via setup.exe and the issue seems to be gone.
> >>
> >> As this is the only change I made: Is it possible that the problem is
> >> not an issue with tar (as discussed on the mailing list) but in fact a
> >> regression in cygwin1.dll?
> >
> > I never saw this happen. Therefore, somebody actually seeing this
> > problem has to debug it. The least I need is an strace.
>
> I'm not sure it needs further debugging. The patch to tar given in
>
> http://cygwin.com/ml/cygwin/2011-04/msg00385.html
>
> solves the problem. Eric said (in the next message) that he will apply
> this to the next release of tar. In the meantime, it's easy to download
> the tar source, apply the patch, and rebuild.
I'm afraid this might only solve a symptom and not fix the root cause.
Anyways, pls find attached two (rather big and therefore gzip'd) script
files with:
- cygcheck -srv output,
- strace of the tar command (succeeding for 1.7.8, failing
for 1.7-9),
- ls -lR of the resulting directory hierarchy
of a tar archive that has a src directory with 100 files and a tgt
directory with symlinks to the files in ../src. The archive was
created via:
mkdir symlinks symlinks/src symlinks/tgt
cd symlinks/src
let i=0
while [ $i -lt 100 ]; do
j=`printf '%03d' $i`; echo $j > $j; let i=$((i+1))
done
cd ../tgt
ln -s ../src/* .
cd ../..
tar czvf symlinks.tar.gz symlinks
Regards,
Wolf
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next prev parent reply other threads:[~2011-06-30 15:28 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-30 12:43 Wolf Geldmacher
2011-06-30 13:37 ` Corinna Vinschen
2011-06-30 15:05 ` Ken Brown
2011-06-30 15:26 ` Corinna Vinschen
2011-06-30 15:28 ` Wolf Geldmacher [this message]
2011-07-04 9:16 ` untarring symlinks with ../ fails randomly, silghtly OT Wolf Geldmacher
2011-07-04 10:47 ` Corinna Vinschen
2011-07-04 10:56 ` Ryan Johnson
2011-07-04 11:34 ` Corinna Vinschen
2011-07-04 11:55 ` Corinna Vinschen
2011-07-04 12:07 ` Wolf Geldmacher
2011-07-04 12:22 ` Ryan Johnson
2011-07-04 14:21 ` Corinna Vinschen
2011-07-04 15:13 ` Corinna Vinschen
2011-07-05 12:12 ` Corinna Vinschen
2011-07-04 15:05 ` Ryan Johnson
2011-07-04 21:44 ` Mark Geisert
2011-07-04 12:00 ` Wolf Geldmacher
2011-07-05 12:12 ` Corinna Vinschen
2011-07-05 12:21 ` Ryan Johnson
2011-07-05 17:02 ` Wolf Geldmacher
2011-07-05 15:53 ` Wolf Geldmacher
[not found] <BANLkTikh9rCN2GRwY3eW20H0isffN5fMUg@mail.gmail.com>
2011-04-24 13:57 ` untarring symlinks with ../ fails randomly Dima Pasechnik
2011-04-24 16:39 ` Corinna Vinschen
2011-04-26 4:46 ` Lester Ingber
2011-04-26 12:56 ` Dima Pasechnik
2011-04-26 13:21 ` Corinna Vinschen
2011-04-26 15:54 ` Dan Grayson
2011-04-26 16:42 ` Christopher Faylor
2011-04-26 17:33 ` Corinna Vinschen
2011-04-26 17:52 ` Dan Grayson
2011-04-27 16:13 ` Dan Grayson
2011-04-27 16:42 ` Eric Blake
2011-04-27 18:49 ` David Boyce
2011-04-27 20:38 ` Eric Blake
2011-04-28 15:33 ` Dan Grayson
2011-04-28 16:06 ` Eric Blake
2011-05-28 22:21 ` Ken Brown
2011-04-28 4:49 ` Lester Ingber
2011-04-26 17:58 ` Dan Grayson
-- strict thread matches above, loose matches on Subject: below --
2011-04-20 16:02 Daniel R. Grayson
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