From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262495AbVFJHLr (ORCPT ); Fri, 10 Jun 2005 03:11:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262501AbVFJHLq (ORCPT ); Fri, 10 Jun 2005 03:11:46 -0400 Received: from web25805.mail.ukl.yahoo.com ([217.12.10.190]:6259 "HELO web25805.mail.ukl.yahoo.com") by vger.kernel.org with SMTP id S262495AbVFJHL0 (ORCPT ); Fri, 10 Jun 2005 03:11:26 -0400 Message-ID: <20050610071121.88587.qmail@web25805.mail.ukl.yahoo.com> Date: Fri, 10 Jun 2005 09:11:21 +0200 (CEST) From: moreau francis Subject: Re: [TTY] exclusive mode question To: Denis Vlasenko , Russell King Cc: Frederik Deweerdt , linux-kernel@vger.kernel.org In-Reply-To: <200506101003.24835.vda@ilport.com.ua> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --- Denis Vlasenko a écrit : > On Thursday 09 June 2005 18:12, Russell King wrote: > > On Thu, Jun 09, 2005 at 04:22:49PM +0200, moreau francis wrote: > > > --- Frederik Deweerdt a écrit : > > > > Le 09/06/05 13:41 +0200, moreau francis écrivit: > > > > > > > > > > oh ok...sorry I misunderstood TIOEXCL meaning ;) > > > > > Do you know how I could implement such exclusive mode (the one I > described) > > > > ? > > > > > > > > > This is handled through lock files, google for LCK..ttyS0 > > > > > > > > > > This lock mechanism is a convention but nothing prevent a user > application to > > > issue a "echo foo > /dev/ttyS0" command while "LCK..ttyS0" file exists... > > > > Which is absolutely necessary to work if you think about an application > > like minicom and its file transfer helpers, which may need to re-open > > the serial port. > > > > TTY locking is done via lock files only, and all non-helper applications > > must coordinate their access via the lock files. There is no other > > mechanism. > > I think original reporter is saying that TIOEXCL is nearly useless then. > -- yes it is what I was trying to say.... ___________________________________________________________________________ Appel audio GRATUIT partout dans le monde avec le nouveau Yahoo! Messenger Téléchargez cette version sur http://fr.messenger.yahoo.com