X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Date: Sun, 14 Feb 2010 20:53:20 -0500
From: Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Tee broken under process substitution?
Message-ID: <20100215015320.GA5207@ednor.casa.cgf.cx>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <4B70918F DOT 1080400 AT ece DOT cmu DOT edu>  <4B70995F DOT 1040602 AT sbcglobal DOT net>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4B70995F.1040602@sbcglobal.net>
User-Agent: Mutt/1.5.20 (2009-06-14)
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On Mon, Feb 08, 2010 at 11:08:15PM +0000, Greg Chicares wrote:
>On 2010-02-08 22:34Z, Ryan Johnson wrote:
>> 
>> cygwin$ echo hi | tee >(cat)
>> hi
>> tee: /dev/fd/63: Bad file descriptor
>
>I don't know a workaround, but FWIW this looks similar:
>  http://cygwin.com/ml/cygwin/2010-01/threads.html#00942

My musing in the above thread was apparently incorrect.  This
has nothing to do with my buggy fifo implementation.  I did a little
more checking on this and the problem is that something like this
doesn't work right now in cygwin:

echo hello >/proc/self/fd/1

when it should.  Implementing this isn't too tricky.  However,
implementing the more general:

echo hello >/proc/<some-other-pid>/fd/1

is harder.

cgf

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple