Message-ID: <4B315820.4010602@gmail.com>
Date: Tue, 22 Dec 2009 23:37:04 +0000
From: Dave Korn <dave.korn.cygwin@googlemail.com>
User-Agent: Thunderbird 2.0.0.17 (Windows/20080914)
MIME-Version: 1.0
To: cygwin@cygwin.com
Subject: Re: select() and named pipes
References: <20091222224309.GA3504@GIOVE>
In-Reply-To: <20091222224309.GA3504@GIOVE>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm
Sender: cygwin-owner@cygwin.com
Mail-Followup-To: cygwin@cygwin.com

Enrico Forestieri wrote:
> I am experiencing a problem with select() and named pipes in cygwin 1.7.
> The attached test case segfaults on the select() call, but works fine
> with both cygwin 1.5 and linux.

  Confirmed.  It appears that start_thread_pipe() is called for both pipes and
fifos, but only for pipes is there a device_specific_pipe in the
select_pipe_info struct passed in; for fifos this pointer is null.  This is
down to the different initialisation sequences in fhandler_pipe::except_* vs.
fhandler_fifo::except_*.  I'm not sure if this is an omission in the except_*
functions or an oversight in the start_thread_pipe function; cgf will know
what to do.

    cheers,
      DaveK


--
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