Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753836AbYFPKbU (ORCPT ); Mon, 16 Jun 2008 06:31:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750931AbYFPKbN (ORCPT ); Mon, 16 Jun 2008 06:31:13 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:44893 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750868AbYFPKbM (ORCPT ); Mon, 16 Jun 2008 06:31:12 -0400 Date: Mon, 16 Jun 2008 11:13:29 +0100 From: Alan Cox To: "R.L. Horn" Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.25.3: serial problem (minicom) Message-ID: <20080616111329.3ae97879@lxorguk.ukuu.org.uk> In-Reply-To: References: <20080614102900.6830ed46@lxorguk.ukuu.org.uk> X-Mailer: Claws Mail 3.4.0 (GTK+ 2.12.8; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1208 Lines: 27 > But, then, what is the relationship between CLOCAL and DTR/RTS supposed to > be? Presumably, it should prevent a SIGHUP from being raised when DSR > goes low, but beyond that, it all seems rather ill-defined. Throw in B0, CLOCAL is defined to "ignore modem control lines" > which the SUS strongly implies should unconditionally lower DTR and RTS, > and the CRTSCTS flag, and the waters really get murky. It looks to me > like the only thing you can say for certain is that CLOCAL will cause DSR > to be ignored...and for anything else you're on your own. Whatever it implies the behaviour should not have changed between 2.6.24 and 2.6.25. Nobody AFAIK sat down and decided to change it. > > Mind you, all this just suggests that POSIX kinda sucks, which is hardly > an earth-shattering revelation. Standards are part written spec and a large part an existing tradition around that standard. The tradition is often the most important bit. Alan -- 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/