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Date:      Mon, 7 Dec 2015 15:22:39 -0200
From:      =?utf-8?B?THXDrXM=?= Fernando Schultz Xavier da Silveira <schultz@ime.usp.br>
To:        Ian Smith <smithi@nimnet.asn.au>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: OSS in jail
Message-ID:  <20151207172239.GC873@hpmini>
In-Reply-To: <20151207234938.F52001@sola.nimnet.asn.au>
References:  <mailman.89.1449489602.81642.freebsd-questions@freebsd.org> <20151207234938.F52001@sola.nimnet.asn.au>

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Thanks for the suggestion. I will post it in those lists.

On Tue, Dec 08, 2015 at 12:04:26AM +1100, Ian Smith wrote:
> In freebsd-questions Digest, Vol 601, Issue 1, Message: 4
> On Sun, 6 Dec 2015 17:44:01 -0200
> Lu?s Fernando Schultz Xavier da Silveira <schultz@ime.usp.br> wrote:
> 
>  > I would like one of my jails to have the ability to play back sound,
>  > but not to record it. As I understand, sound is played back by writing
>  > to /dev/dsp and recorded by reading from it. Hence, placing the /dev/dsp
>  > device (and /dev/dsp[0-9]* devices) in the jail via devfs.rules is not
>  > a solution since the jail superuser can override permissions on these
>  > devices and even read from them when they lack read permission.
>  > 
>  > Is there a way to give a device to a jail in read-only mode?
>  > If not, is it possible to create a virtual OSS stack and give that to
>  > the jail?
>  > How would you solve this problem?
>  > 
>  > Also, is it possible to give the jail a mixer device that can only read
>  > mixer settings but not alter them?
>  > 
>  > Thanks,
>  > Lu?s
> 
> Sorry about charset mapping ..
> 
> I suggest asking this (interesting) question in either or both of
> freebsd-jail@freebsd.org and freebsd-multimedia@freebsd.org .
> 
> I'm vaguely wondering if you could use port audio/jack for this, but 
> I've only used that on Linux, and that with ALSA .. but I expect you 
> should find some help from the habitual denizens of those lists.
> 
> cheers, Ian
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