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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	stephane.thiell@cea.fr
Subject: Re: [patch/rfc] Make poll/select report error (POLLNVAL and EBADF) for unsupported files
Date: Mon, 15 Feb 2010 18:47:47 +0100	[thread overview]
Message-ID: <1266256067.8262.27.camel@edumazet-laptop> (raw)
In-Reply-To: <1266255759.8262.26.camel@edumazet-laptop>

Le lundi 15 février 2010 à 18:42 +0100, Eric Dumazet a écrit :

> Hmm, according to POSIX :
> 
> 	The poll() function shall support regular files, terminal and
> pseudo-terminal devices, FIFOs, pipes, sockets ...
> 
> 	Regular files shall always poll TRUE for reading and writing.
> 
> 
> So unless I missed something, this patch could break some conformant
> applications.
> 
> In particular, if an application is polling() on stdin (usually a tty),
> and other 'files', what's happening if we do :
> 
> cat replay_file | application

Doh..

I meant : application < replay_file

> 
> Either it wont read stdin, or application exits without reading its
> input.
> 



  reply	other threads:[~2010-02-15 17:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-14 22:27 Davide Libenzi
2010-02-15 17:42 ` Eric Dumazet
2010-02-15 17:47   ` Eric Dumazet [this message]
2010-02-15 17:50   ` Davide Libenzi
2010-02-17 17:21     ` THIELL Stephane
2010-02-17 18:16       ` Davide Libenzi

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