From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933120AbdELJrQ (ORCPT ); Fri, 12 May 2017 05:47:16 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:44580 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932315AbdELJrP (ORCPT ); Fri, 12 May 2017 05:47:15 -0400 Date: Fri, 12 May 2017 11:47:12 +0200 From: Pavel Machek To: Michal Hocko Cc: Jingoo Han , Lee Jones , linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: setting brightness as privileged operation? Message-ID: <20170512094712.GA29780@amd> References: <20170105092307.GD21618@dhcp22.suse.cz> <20170511210755.GA1360@xo-6d-61-c0.localdomain> <20170512062003.GB6803@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="+QahgC5+KEYLbs62" Content-Disposition: inline In-Reply-To: <20170512062003.GB6803@dhcp22.suse.cz> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --+QahgC5+KEYLbs62 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri 2017-05-12 08:20:04, Michal Hocko wrote: > On Thu 11-05-17 23:07:55, Pavel Machek wrote: > > On Thu 2017-01-05 10:23:07, Michal Hocko wrote: > > > Hi, > > > I have just learned that my Xfce Power Manager cannot manipulate > > > brightness because I do not have policykit installed on my computer. > > > There is a reason for that (yeah it depends on systemd which I prefer > > > not have). > > >=20 > > > While this is clearly a problem of the Xfce applet I am wondering why > > > setting the brightness has to be a privileged operation at all. Is th= ere > > > any strong reason for it or just a general policy that we do not give > > > world writable files into sysfs? > >=20 > > Well, if you have another user logged in using ssh, and changing _your_ > > brightness, that will be somehow annoying, right? >=20 > I am pretty sure that such a user can do much larger harm than playing > with brigtness of my LCD. Anyway I went with my own rc.local hack. Can he? Those are bugs to be fixed. We don't want them in kernel... =20 Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --+QahgC5+KEYLbs62 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlkVhKAACgkQMOfwapXb+vKd7ACdFWP6iqrXw4NSWv4g+GI3y6YR xgwAnRBA77pNstMnPbmXP/T3GdCXO54X =xH/j -----END PGP SIGNATURE----- --+QahgC5+KEYLbs62--