Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 20 Mar 2003 10:58:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 20 Mar 2003 10:58:27 -0500 Received: from copper.ftech.net ([212.32.16.118]:40150 "EHLO relay5.ftech.net") by vger.kernel.org with ESMTP id ; Thu, 20 Mar 2003 10:58:25 -0500 Message-ID: <7C078C66B7752B438B88E11E5E20E72E0EF765@GENERAL.farsite.co.uk> From: Kevin Curtis To: "'bert hubert'" , "Filipau, Ihar" Cc: "'linux-kernel@vger.kernel.org'" Subject: RE: read() & close() Date: Thu, 20 Mar 2003 16:09:20 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain; charset="iso-8859-1" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1637 Lines: 52 Hi, I have come across this problem when implementing a sockets interface to our X.25 card. On the thread that wants to close the socket, it must first issue a shutdown(). This will unblock the read() or poll(). And then you can do the close(). Kevin -----Original Message----- From: bert hubert [mailto:ahu@ds9a.nl] Sent: 20 March 2003 15:08 To: Filipau, Ihar Cc: 'linux-kernel@vger.kernel.org' Subject: Re: read() & close() On Thu, Mar 20, 2003 at 03:14:52PM +0100, Filipau, Ihar wrote: > I have/had a simple issue with multi-threaded programs: > > one thread is doing blocking read(fd) or poll({fd}) on > file/socket. You can't do poll on a file, it won't tell you anything useful, so I assume you mean a socket. > another thread is doing close(fd). > > I expected first thread will unblock with some kind > of error - but nope! It is blocked! Can you show code with this problem? Regards, bert -- http://www.PowerDNS.com Open source, database driven DNS Software http://lartc.org Linux Advanced Routing & Traffic Control HOWTO http://netherlabs.nl Consulting - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/