From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266154AbUGESGM (ORCPT ); Mon, 5 Jul 2004 14:06:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266158AbUGESGL (ORCPT ); Mon, 5 Jul 2004 14:06:11 -0400 Received: from postfix3-2.free.fr ([213.228.0.169]:17291 "EHLO postfix3-2.free.fr") by vger.kernel.org with ESMTP id S266154AbUGESF4 (ORCPT ); Mon, 5 Jul 2004 14:05:56 -0400 Subject: getting /dev/ from (MAJOR, minor) From: =?ISO-8859-1?Q?Beno=EEt?= Dejean Reply-To: TazForEver@free.fr To: LKML Content-Type: text/plain; charset=UTF-8 Date: Mon, 05 Jul 2004 20:05:50 +0200 Message-Id: <1089050750.20203.12.camel@athlon> Mime-Version: 1.0 X-Mailer: Evolution 1.5.9.2 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org (sorry for my english) (sorry if this is not the good place to ask, but i didn't get any anwser on comp.os.linux.development.system) Hi, i'd like to retrieve iostats from /sys in a userspace program. My library has a function fsusage(mount_point) which is implemented using statvfs(), etc. I'd like to extend it to provide information described in linux/documentation/iostats.txt : read/write sectors (? the documentation doesn't say what is a sector, am i wrong if i assume it's 512B on every arch and filesystem ?). So i need to know the device name to browse /sys/block to the 'stat' file. I would like to avoid getmntent() (retrieving the device name from the mount table). I was thinking about retrieving the (major, minor) with stat() in order to get the devname. But i didn't find any quick way to get it (readdir()-ing /dev is stupid, i'd better use getmntent()). How can i retrieve the devname with its (M, m) ? I want to avoid getmntent, not for performance issue (should not be critical) but for internal reasons. Btw, even if i finally read the mnttab, i'm interested in the answer. thank you. -- Benoît Dejean JID: TazForEver@jabber.org http://gdesklets.gnomedesktop.org http://www.paulla.asso.fr