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From: Chris Faylor <cgf AT cygnus DOT com>
Date: Tue, 4 Jul 2000 23:39:07 -0400
To: cygwin AT sourceware DOT cygnus DOT com
Subject: Re: Tar.exe doing nothing
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In-Reply-To: <003401bfe631$74912b00$3c5350d8@guinness>; from matts@bluesguitar.org on Tue, Jul 04, 2000 at 10:31:06PM -0500

On Tue, Jul 04, 2000 at 10:31:06PM -0500, Matthew Smith wrote:
>gunzip < filename.tar.gz | tar xvf -
>
>That will work with most any version of tar.

Of course, we're talking about Cygwin, which uses GNU tar, and GNU
tar will happily use the option that I mentioned.

If you want to do more typing, this mechanism works great, too.

Or, if you want to vary this slightly and confuse the issue a little more,
you can also do:

zcat filename.tar.gz | tar xvf -
gzip -c -d filename.tar.gz | tar xvf -
/bin/gunzip -c < ./filename.tar.gz | /bin/tar -x -v -f - -C .

If you are looking to do the maximum amount of typing then the last option
is obviously the best.

cgf

>> On Wed, Jul 05, 2000 at 02:12:33AM +0200, Jonas Jensen wrote:
>> >Well, silly me :-)
>> >
>> >Now, 2 more questions about that:
>> >
>> >-What the hell is the purpuse of that feature?
>> 
>> Tar used to be commonly used with a tape device.  If you don't use the
>> -f option it defaults to an arbitrary device for extraction.  I assume
>> that cygwin defaults to standard input.
>> 
>> In case it isn't obvious to you, the Cygwin project did not invent the
>> tar program.  This tar behavior is far from new.  The tar program has
>> been a standard part of UNIX for a long long time.  Cygwin is a UNIX
>> emulation environment, so...
>> 
>> >-Is there an easy program to unzip the contents of a .tar.gz file
>> >without first using gzip.exe and then tar.exe?  Or a good way to set up
>> >an alias/script to do this?
>> 
>> I sounds like you still aren't reading the "tar --help" output very
>> closely.
>> 
>> The '-z' option automatically uncompresses an archive before extraction
>> or creation:
>> 
>> tar -xzf somefile.tar.gz

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