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Date: Tue, 19 Apr 2005 12:13:17 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: 1.5.12-1: poll bug (Windows 2000)
Message-ID: <20050419101317.GN16098@cygbert.vinschen.de>
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On Apr 15 22:45, Tony Jaa wrote:
> Cygwin v1.5.12-1/Windows 2000
> 
> Cygwin poll() uses POLLPRI as the flag for detecting
> exceptions, POLLPRI must be explicitly set (otherwise
> socket exceptions aren't reported), and POLLERR is
> only used when select() returns -1 but there was no
> WSAENOTCONN. However, the Unix man page for poll()
> says POLLPRI is for detecting urgent data to read,
> POLLERR is for detecting exceptions, and POLLERR does
> not need to be explicitly set in the pollfd.events
> field. Why is POLLPRI used for detecting exceptions
> instead of POLLERR? Why are exceptions only detected
> when POLLPRI is set instead of being detected
> automatically?

I've created a patch which should result in poll behaving more closely
to Linux.  It didn't make it into the 1.5.15 release but you can try
the latest developer snapshot from http://www.cygwin.com/snapshots/


Thanks for the testcase,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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