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Date: Mon, 20 Apr 2015 20:39:17 -0600
From: Eric Blake <eblake AT redhat DOT com>
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To: Murthy Gandikota <murthy64 AT hotmail DOT com>,
        "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: Re: tar zxvf won't  work with Redhat generated compressed tar file
References: <COL130-W80F61D41DBC766A5C40206C2E00 AT phx DOT gbl>,<969800560 DOT 20150420222609 AT yandex DOT ru>   <COL130-W78804B6BA04135A92CC2FAC2E00 AT phx DOT gbl>,<509379965 DOT 20150420235036 AT yandex DOT ru> <COL130-W65B445CB84F1010DEEDA6EC2E00 AT phx DOT gbl>,<55356CBB DOT 9030601 AT redhat DOT com>,<COL130-W530B6F57CC449D3CD22F44C2E00 AT phx DOT gbl> <COL130-W103DBAFD945896AC6F7E51C2E00 AT phx DOT gbl>
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On 04/20/2015 05:06 PM, Murthy Gandikota wrote:
> 
> 
> ----------------------------------------
>> From: murthy64 AT hotmail.com
>> To: eblake AT redhat.com; cygwin AT cygwin.com

No need to CC me - I read the list.  Also, no need to include raw emails
in your reply (we not only ask that you avoid top-posts, but also that
you trim to relevent content).

>> Yes, Sir. It did untar properly. So the problem is with the server compressing during the download (I get the file from a http server)?

You may want to report that to the owner of the website you were
downloading from.

> 
> It would be doubly nice if cygwin handled it ;-)

I'm not going to add a cygwin-specific patch; you'd get the same
behavior on Linux.  If you want to convince upstream to do double
uncompression in a single process, then it will eventually percolate
downstream; but I don't think anyone will want to take on a patch like that.

> It seems gunzip had no problem recognizing the file as double compressed.

No. Your manual gunzip removed one layer of compression, then your tar
command (with or without the 'z') ran a second gunzip to remove the
second layer of compression.  There was no single process doing double
uncompression.


-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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