Re: [PATCH] udev: Allow ALSA input jacks to be accessed by the current user

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At Fri, 17 Jun 2011 08:17:07 +0200,
David Henningsson wrote:
> 
> 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
> >> <david.henningsson@xxxxxxxxxxxxx>  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

Thanks, I see it now.


Takashi
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