X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Sat, 23 Jan 2010 14:03:43 -0500 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: Bash process substitution Message-ID: <20100123190343.GB9739@ednor.casa.cgf.cx> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <4B59F278.2090902@gmail.com> <20100123110719.GU2402@calimero.vinschen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100123110719.GU2402@calimero.vinschen.de> User-Agent: Mutt/1.5.20 (2009-06-14) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com On Sat, Jan 23, 2010 at 12:07:19PM +0100, Corinna Vinschen wrote: >On Jan 22 18:46, Dave wrote: >> Is process substitution expected to work in 1.7.1? >> >> Here's what I tried: >> >> kilroyd@MINIME ~ >> $ uname -a >> CYGWIN_NT-5.1 MINIME 1.7.1(0.218/5/3) 2009-12-07 11:48 i686 Cygwin >> >> kilroyd@MINIME ~ >> $ echo LOG:bananas | tee file.txt >> LOG:bananas >> >> kilroyd@MINIME ~ >> $ cat file.txt >> LOG:bananas >> >> kilroyd@MINIME ~ >> $ echo LOG:bananas | tee >(grep "^LOG:" > file.txt) >> LOG:bananas >> tee: /dev/fd/63: Bad file descriptor > >I'm not quite sure how this command works under the hood, but it's >possible that this can't work in Cygwin due to a restriction in >Windows. In contrast to Unix, you can't call open(pipe_fd, O_RDONLY) >if pipe_fd is the write side of a pipe and vice versa. If bash's >process substitution relies on that, it's simply not possible. >Dunno if there is a way to implement this using some hackery, of course... I thought this construction used a fifo under the hood. That could point to YA problem with my fifo implementation. 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