Date: Sat, 12 Dec 2015 20:44:23 -0200 From: =?utf-8?B?THXDrXM=?= Fernando Schultz Xavier da Silveira <schultz@ime.usp.br> To: freebsd-jail@freebsd.org Subject: OSS in jail Message-ID: <20151212224422.GB4884@hpmini>
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Hi, 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 write-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, Luís
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