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Date:   Wed, 20 Jun 2018 17:41:23 +0200
From:   Torsten =?iso-8859-1?Q?B=F6gershausen?= <tboegi@web.de>
To:     Jeff King <peff@peff.net>
Cc:     Eric Sunshine <sunshine@sunshineco.com>,
        Junio C Hamano <gitster@pobox.com>,
        Git List <git@vger.kernel.org>, Max Kirillov <max@max630.net>
Subject: Re: t5562: gzip -k is not portable
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On Wed, Jun 20, 2018 at 08:40:06AM -0400, Jeff King wrote:
> On Wed, Jun 20, 2018 at 08:13:06AM +0200, Torsten Bögershausen wrote:
> 
> > Good eyes, thanks.
> > The "-f -c" combo works:
> > 
> > -       gzip -k fetch_body &&
> > +       gzip -f -c fetch_body >fetch_body.gz &&
> >         test_copy_bytes 10 <fetch_body.gz >fetch_body.gz.trunc &&
> > -       gzip -k push_body &&
> > +       gzip -f -c push_body >push_body.gz &&
> 
> Do we still need "-f"?  With "-c" gzip is only writing to stdout, so we
> should not need to force anything.
> 
> -Peff

You are rigth, -f is not needed.

I was confusing stdout with terminal :-( 
Most often stdout is the terminal, but not here of course.