From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Henningsson Date: Fri, 17 Jun 2011 06:17:07 +0000 Subject: Re: [PATCH] udev: Allow ALSA input jacks to be accessed by the current Message-Id: <4DFAF163.5030908@canonical.com> List-Id: References: <4DFA0F40.7000204@canonical.com> In-Reply-To: <4DFA0F40.7000204@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On 2011-06-16 16:48, Takashi Iwai wrote: > At Thu, 16 Jun 2011 16:28:08 +0200, > Kay Sievers wrote: >> >> On Thu, Jun 16, 2011 at 16:12, David Henningsson >> wrote: >>> One missing piece for userspace (PulseAudio etc) to actually be able to use >>> the jack input devices that ALSA create, is that these devices are >>> accessible by root only. This patch makes the input device nodes accessible >>> by the same users that can access the sound card: the current logged in >>> user, as well as users in the audio group. >>> >>> One thing I was thinking about, was that the udev-acl rule actually grants >>> read-write access to the input device node, where probably only read access >>> is needed. Is this dangerous? >> >> Takashi, wasn't there already something else to use from ALSA than the >> artificial input devices? > > These input devices are just notification from the sound driver at > jack plugging, so basically it's read-only indeed, and setting the > file permission RO would make sense. > > I can't judge more since I haven't seen the patch. It was posted to alsa-devel (for comments) two days ago, see: http://mailman.alsa-project.org/pipermail/alsa-devel/2011-June/040916.html and http://mailman.alsa-project.org/pipermail/alsa-devel/2011-June/040917.html -- David Henningsson, Canonical Ltd. http://launchpad.net/~diwic