Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932696Ab0KPVnL (ORCPT ); Tue, 16 Nov 2010 16:43:11 -0500 Received: from tango.0pointer.de ([85.214.72.216]:53062 "EHLO tango.0pointer.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932480Ab0KPVnK (ORCPT ); Tue, 16 Nov 2010 16:43:10 -0500 Date: Tue, 16 Nov 2010 22:42:50 +0100 From: Lennart Poettering To: Alan Cox Cc: Kay Sievers , linux-kernel , Greg KH , Werner Fink , Jiri Slaby Subject: Re: tty: add 'active' sysfs attribute to tty0 and console device Message-ID: <20101116214250.GB17824@tango.0pointer.de> References: <1289922400.1253.3.camel@yio.site> <20101116155717.6671e484@lxorguk.ukuu.org.uk> <20101116171447.29336514@lxorguk.ukuu.org.uk> <20101116195538.7fa66b97@lxorguk.ukuu.org.uk> <20101116204906.29d840e9@lxorguk.ukuu.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101116204906.29d840e9@lxorguk.ukuu.org.uk> Organization: Red Hat, Inc. X-Campaign-1: () ASCII Ribbon Campaign X-Campaign-2: / Against HTML Email & vCards - Against Microsoft Attachments User-Agent: Leviathan/19.8.0 [zh] (Cray 3; I; Solaris 4.711; Console) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1089 Lines: 26 On Tue, 16.11.10 20:49, Alan Cox (alan@lxorguk.ukuu.org.uk) wrote: > /dev/tty* and sysfs nodes don't track permissions, owner with each other, > so you are providing interfaces that either expose information they > shouldn't (which screen is valuable info in some environments), or don't > expose info they should. Well, I find the informatoin who is logged in much more valuable then the information whether I am active or not. And the who is logged in informatin I can find out with a simple stat() on the tty caller. > sysfs also lacks vhangup so you can't fix it right now either. Which is a feature, no a bug. It would be kinda messy if the service which manages device access based on whose session is active would always be forcibly stopped from doing so if somebody calls vhangup(). Lennart -- Lennart Poettering - Red Hat, Inc. -- 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/