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From: John Adams <johna@onevista.com>
Organization: One Vista Associates
To: linux-kernel@vger.kernel.org
Subject: Re: Need blocking /dev/null
Date: Fri, 2 Nov 2001 16:04:13 -0400
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On Thursday 01 November 2001 18:51, Riley Williams wrote:
> Hi Doug.
>
> >> 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.  ;)

You really do take the hard way.  Try this to pipe just stderr:
command_that_outputs_on_1_and_2   2>/dev/stdout 1>/dev/null | eat
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