X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-1.3 required=5.0	tests=AWL,BAYES_00,KHOP_THREADED,RCVD_IN_DNSWL_NONE,RCVD_IN_HOSTKARMA_YE,RCVD_IN_SORBS_WEB,SPF_HELO_PASS,TW_RX
X-Spam-Check-By: sourceware.org
From: "James Johnston" <JamesJ AT motionview3d DOT com>
To: <cygwin AT cygwin DOT com>
References: <CA+7con=b9M5a_zuvg97L0wcdTVfLG=Ye8+0CPdPdgTNKn5JEtA AT mail DOT gmail DOT com> <05f101cd32bf$d16a9d60$743fd820$@motionview3d.com>
In-Reply-To: <05f101cd32bf$d16a9d60$743fd820$@motionview3d.com>
Subject: RE: rxvt loses output connection with non cygwin console processes
Date: Tue, 15 May 2012 17:30:34 -0000
Message-ID: <05f201cd32c0$706ec670$514c5350$@motionview3d.com>
MIME-Version: 1.0
Content-Type: text/plain;	charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.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

I apologize, I forgot to mention that I tried both with and without the new
"pipe_byte" CYGWIN option.  It made no difference.

To OP: you'll definitely want to look into using the new "pipe_byte" option
since you are working with non-Cygwin processes.  See the thread I started
late last month titled "Cygwin passes through null writes to other software
when redirecting standard input/output".  If you redirect standard input for
a non-Cygwin program, you'll be affected.

> As the OP notes, I also only have this problem when running the test
> program from a "GUI" terminal.  It seems that any program doing a null
write
> to standard output (and probably standard error?) will trigger the
problem.
> 
> From Windows command prompt / standard Windows console window:
> Running Cygwin.bat to start Cygwin and then running ./Test.exe works fine.
> 
> From mintty.exe:  Running ./Test.exe causes bash to hang.  Test.exe runs
to
> completion and terminates, but bash doesn't get the hint.  CPU usage is at
> 0%.  If I use Windows Task Manager to kill bash.exe, then mintty.exe
> correctly terminates.
> 
> From rxvt.exe:  Running ./Test.exe causes bash to hang like with mintty.
> Test.exe runs to completion and terminates but bash is hung.  For some
> reason, a thread in rxvt spins in an infinite loop, sucking 100% of a
single CPU
> core.  The hung bash.exe doesn't use any CPU.  If I use Windows Task
> Manager to kill bash.exe, then rxvt.exe correctly exits its loop and
> terminates. 


--
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