Date: Sun, 11 Feb 2001 00:19:46 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: Blaz Zupan <blaz@amis.net> Cc: <Andrew.Hodgkins@hurlburt.af.mil>, <kstewart@urx.com>, <freebsd-stable@FreeBSD.ORG> Subject: Re: RE: Proposed makewhatis perl script fix Message-ID: <200102110819.f1B8Jk430590@earth.backplane.com> References: <Pine.BSF.4.32.0102110834080.13021-100000@titanic.medinet.si>
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:> :of what is broken.
:> :
:> :Kent
:>
:> makewhatis is just makewhatis... it has nothing to do with tar.
:>
:> When you tar something up, tar writes full blocks. But when you untar
:> something the actual end of the archive may occur in the middle of a
:> block. tar will close the input descriptor 'early' in this case,
:> potentially before gunzip or uncompress manage to write the last block
:> of zeros.
:
:I also don't believe that this is the real fix - there is something fishy
:going on in stable. I just upgraded all of our servers from 4.2-RELEASE to
:4.2-STABLE and I see the following messages upon installing *any* package:
:
:/home/blaz# pkg_add gmake-3.79.1.tgz
:
:gzip: stdout: Broken pipe
:tar: child returned status 1
:/home/blaz#
:
:The package actually appears to install and work fine. I also noticed similar
:messages from gzip during "make" on a port, but again the port built and
:installed fine after that.
:
:So no, your makewhatis patch only appears to be a bandaid, but there is
:something going on deeper (possibly in the kernel) that was not there in
:4.2-RELEASE.
:
:Blaz Zupan, Medinet d.o.o, Linhartova 21, 2000 Maribor, Slovenia
:E-mail: blaz@amis.net, Tel: +386-2-320-6320, Fax: +386-2-320-6325
There's nothing wrong with the kernel. It's exactly what I said it
was.
pkg_add runs tar with the --fast-read option to extract the table of
contents. When I remove the option pkg_add no longer reports broken
pipes. When gunzip'ing piped to tar, and tar exits early due to
the option, gunzip properly gets a 'gzip: stdout: Broken pipe' error.
Maybe 'tar' was changed recently, maybe 'gunzip' was changed recently,
I don't know. But it isn't a kernel problem. The kernel is doing
exactly what it is supposed to be doing.
-Matt
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