Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 4 Nov 2001 15:48:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 4 Nov 2001 15:48:18 -0500 Received: from shed.alex.org.uk ([195.224.53.219]:56483 "HELO shed.alex.org.uk") by vger.kernel.org with SMTP id ; Sun, 4 Nov 2001 15:47:59 -0500 Date: Sun, 04 Nov 2001 20:47:53 -0000 From: Alex Bligh - linux-kernel Reply-To: Alex Bligh - linux-kernel To: =?ISO-8859-1?Q?Jakob_=D8stergaard?= , Tim Jansen Cc: linux-kernel@vger.kernel.org, Alex Bligh - linux-kernel Subject: Re: PROPOSAL: dot-proc interface [was: /proc stuff] Message-ID: <625740430.1004906873@[195.224.237.69]> In-Reply-To: <20011104211153.V14001@unthought.net> In-Reply-To: <20011104211153.V14001@unthought.net> X-Mailer: Mulberry/2.1.0 (Win32) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >> Using a ioctl that returns the type. > > But that's not pretty :) > > Can't we think of something else ? Well this sure isn't perfect, but to illustrate it can be done with a text interface (and the only restriction is strings can't contain \n): cat /proc/widget # Format: '%l' # Params: Number_of_Widgets 37 echo '38' > /proc/widget cat /proc/widget # Format: '%l' # Params: Number_of_Widgets 38 cat /proc/widget | egrep -v '^#' 38 cat /proc/sprocket # Format: '%l' '%s' # Params: Number_of_Sprockets Master_Sprocket_Name 21 Foo Bar Baz echo '22' > /proc/sprocket # writes first value if no \n character written before # close - all writes done simultaneously on close cat /proc/sprocket | egrep -v '^#' 22 Foo Bar Baz echo 'Master_Sprocket_Name\nBaz Foo Bar' > /proc/sprocket cat /proc/sprocket | egrep -v '^#' 22 Baz Foo Bar echo 'Master_Sprocket_Name\nFoo Foo Foo\nNumber_of_Sprockets\n111' > /proc/sprocket # Simultaneous commit if /proc driver needs it # i.e. it has get_lock() and release_lock() # entries cat /proc/sprocket | egrep -v '^#' 111 Foo Foo Foo & nice user tools look at the '# Params:' line to find what number param they want to read / alter. -- Alex Bligh - 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/