From owner-freebsd-hackers@FreeBSD.ORG Tue Apr 22 21:03:26 2008 Return-Path: <owner-freebsd-hackers@FreeBSD.ORG> Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D74BE106567C for <freebsd-hackers@freebsd.org>; Tue, 22 Apr 2008 21:03:26 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from hosted.kievnet.com (hosted.kievnet.com [193.138.144.10]) by mx1.freebsd.org (Postfix) with ESMTP id 9B2DE8FC26 for <freebsd-hackers@freebsd.org>; Tue, 22 Apr 2008 21:03:26 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from localhost ([127.0.0.1] helo=edge.pp.kiev.ua) by hosted.kievnet.com with esmtpa (Exim 4.62) (envelope-from <avg@icyb.net.ua>) id 1JoOZG-000OqY-5R for freebsd-hackers@freebsd.org; Tue, 22 Apr 2008 22:54:18 +0300 Message-ID: <480E4269.2090604@icyb.net.ua> Date: Tue, 22 Apr 2008 22:54:17 +0300 From: Andriy Gapon <avg@icyb.net.ua> User-Agent: Thunderbird 2.0.0.12 (X11/20080320) MIME-Version: 1.0 To: freebsd-hackers@freebsd.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: devctl (alike?) for devfs X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD <freebsd-hackers.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, <mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers> List-Post: <mailto:freebsd-hackers@freebsd.org> List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, <mailto:freebsd-hackers-request@freebsd.org?subject=subscribe> X-List-Received-Date: Tue, 22 Apr 2008 21:03:26 -0000 Maybe this is a crazy idea or maybe we already have something like this. Is it possible to get notifications about changes in devfs - appearance and disappearance of devices (in devfs sense of the word)? devctl currently notifies about real (hardware) devices handled by device drivers and some notifications about hardware/driver events. But what if I want to automatically run some action if /dev/ufs/magic-label appears? Or if I want to monitor appearance and disappearance of ad* and da* devices (without having to monitor low level drivers like umass)? -- Andriy Gapon