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Message-ID: <3BE0FF4E.4A9D06AF@alsa-project.org>
Date: Thu, 01 Nov 2001 08:52:46 +0100
From: Abramo Bagnara <abramo@alsa-project.org>
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To: Doug McNaught <doug@wireboard.com>
Cc: Riley Williams <rhw@MemAlpha.cx>, Ville Herva <vherva@niksula.hut.fi>,
        Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Need blocking /dev/null
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Doug McNaught wrote:
> 
> Riley Williams <rhw@MemAlpha.cx> writes:
> 
> > Are you sure?
> >
> > > find / -name "wanted-but-lost-download" | eat
> >
> > Doesn't work - you're piping the stdin there, not stderr as per my
> > example above. AFAIK, there's no way to pipe stderr without also piping
> > stdout, hence this sort of solution just doesn't work.
> 
> The Bourne shell is more perverse than you realize:
> 
> $ exec 3>&1; find / -name "wanted-but-lost-download" 2>&1 1>&3 3>&- | eat
> 
> [stolen from "Csh Programming Considered Harmful" by Tom Christiansen]
> 
> Horrible, but does work.  ;)
 
$ find / -name "wanted-but-lost-download" 2>&1 1>&0 | eat

is simpler although dependent on stdin being a tty

-- 
Abramo Bagnara                       mailto:abramo@alsa-project.org

Opera Unica                          Phone: +39.546.656023
Via Emilia Interna, 140
48014 Castel Bolognese (RA) - Italy

ALSA project               http://www.alsa-project.org
It sounds good!
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