From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S269841AbTGKJMn (ORCPT ); Fri, 11 Jul 2003 05:12:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269842AbTGKJMn (ORCPT ); Fri, 11 Jul 2003 05:12:43 -0400 Received: from e32.co.us.ibm.com ([32.97.110.130]:56791 "EHLO e32.co.us.ibm.com") by vger.kernel.org with ESMTP id S269841AbTGKJMm (ORCPT ); Fri, 11 Jul 2003 05:12:42 -0400 Date: Fri, 11 Jul 2003 15:03:54 +0530 From: Ravikiran G Thirumalai To: linux-kernel@vger.kernel.org Subject: tty: Line disc gets reset after close Message-ID: <20030711093354.GA1312@llm08.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On a rs232 serial port, If i try # stty -F /dev/ttyS0 line 2 and then execute # stty -F /dev/ttyS0 -a line disc was shown as line = 0. Further investigation showed that close on the tty fd and subsequent open to it resets the line disc to 0. My question is, is this the expected behaviour? If change flags like icanon, it remains inspite of close and opens. I'd expect ldisc to remain that way too. Thanks, Kiran