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

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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.


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