Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751036AbWE1XGZ (ORCPT ); Sun, 28 May 2006 19:06:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751038AbWE1XGZ (ORCPT ); Sun, 28 May 2006 19:06:25 -0400 Received: from hera.kernel.org ([140.211.167.34]:30689 "EHLO hera.kernel.org") by vger.kernel.org with ESMTP id S1751036AbWE1XGY (ORCPT ); Sun, 28 May 2006 19:06:24 -0400 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: Re: How to send a break? Date: Sun, 28 May 2006 16:06:06 -0700 (PDT) Organization: Mostly alphabetical, except Q, with we do not fancy Message-ID: References: <01b701c6818d$4bcd37b0$1800a8c0@dcccs> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Trace: terminus.zytor.com 1148857566 31844 127.0.0.1 (28 May 2006 23:06:06 GMT) X-Complaints-To: news@terminus.zytor.com NNTP-Posting-Date: Sun, 28 May 2006 23:06:06 +0000 (UTC) X-Newsreader: trn 4.0-test76 (Apr 2, 2001) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 751 Lines: 27 Followup to: <01b701c6818d$4bcd37b0$1800a8c0@dcccs> By author: =?iso-8859-2?Q?Haar_J=E1nos?= In newsgroup: linux.dev.kernel > > Hello, list, > > I wish to know, how to send a "BREAK" to trigger the sysreq functions on the > serial line, using echo. > > I mean like this: > > #!/bin/bash > echo "?BREAK?" >/dev/ttyS0 > sleep 2 > echo "m" >/dev/ttyS0 > You can't use it using echo, however, you can do it using Perl: perl -e 'use POSIX; tcsendbreak(1,0);' > /dev/ttyS0 -hpa - 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/