From owner-freebsd-current@FreeBSD.ORG  Tue Apr  5 16:45:39 2005
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Date: Tue, 5 Apr 2005 12:45:23 -0400
From: David Schultz <das@FreeBSD.ORG>
To: Michael Nottebrock <michaelnottebrock@gmx.net>
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cc: Tim Kientzle <kientzle@FreeBSD.ORG>
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Subject: Re: Heads up: gtar gone from base system
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On Tue, Apr 05, 2005, Michael Nottebrock wrote:
> On Tuesday, 5. April 2005 17:33, Tim Kientzle wrote:
> > David Schultz wrote:
> > > ... a quick fix would be to accept --use-compress-program as
> > > an undocumented option and ignore it.
> >
> > Tempting, tempting.... ;-/
> 
> Not one bit, IMHO. I can't imagine a single case where something would use 
> --use-compress-program and it would continue to work if the tar in question 
> simply ignored it.

Why not?  If libarchive supports the compression format, it will
automatically detect it and perform the appropriate decompression.

> In ark's case, ark would just fail to extract an archive 
> completely silently, making it harder to diagnose what's going wrong.

Why?  If libarchive doesn't support the compression format, then
it will fail and ark should detect this.