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Date: Wed, 4 Jun 2003 15:44:28 +0200 (CEST)
From: Harti Brandt <brandt@fokus.fraunhofer.de>
To: Marc Olzheim <marcolz@stack.nl>
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cc: current@freebsd.org
Subject: Re: devfs and /dev/fd/3
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On Wed, 4 Jun 2003, Marc Olzheim wrote:

MO>Hi.
MO>
MO>I've seen the question once before, but it was not answered (on-list ?),
MO>so now that I run in on it, I'd like to know what to do:
MO>
MO>On FreeBSD 4.x, without devfs, the following worked:
MO>( echo foo | tee /dev/fd/3 | tr f F ) 3>&1
MO>
MO>It should produce both "foo" and "Foo"
MO>
MO>FreeBSD 5 with devfs, however, does not create a /dev/fd/3 upon opening
MO>filedescriptor 3 by the shell, so there's no device to write to...
MO>
MO>How can I fix or circumvent this, aside from mounting a ufs partition
MO>with mknod-ed files over /dev/fd ?

You must

mount -tfdescfs fdesc /dev/fd

but your example doesn't work even then (although it gives no error).
Don't know why.

harti
-- 
harti brandt,
http://www.fokus.fraunhofer.de/research/cc/cats/employees/hartmut.brandt/private
brandt@fokus.fraunhofer.de, harti@freebsd.org