Re: [linux-audio-dev] Please test the RT rlimits patch for audio

On Wed, Apr 27, 2005 at 08:13:21AM +1000, Luke Yelavich wrote: I've written a small setuid utility which gives access to the new resource limits on an otherwise unpatched system (so long as a kernel with the new resource limits is running, of course). It should work regardless of whether PAM is installed, but my main motivation in writing it was to allow me to access the new functionality under Slackware 10.x (with a 2.6 kernel). Grab the tarball from http://www.physics.adelaide.edu.au/~jwoithe/set_rtlimits-1.0.0.tgz Sorry, no homepage yet. Read the enclosed README and manpage for full details. In short, a simple text file /etc/set_rtlimits.conf is used to configure which users (or groups) can run which programs with elevated realtime/nice priorities. The maximum priorities requestable is limited on a user+program basis, so a single user or group can have different maximum priorities for different programs if this is desired. Once set up, using it is as simple as inserting set_rtlimits in front of the program you wish to run (and its parameters). For example: set_rtlimits -r=100 /usr/local/bin/muse -a will run muse with the dummyaudio driver with a maximum realtime priority resource limit of 100. Note the full path to the program to execute is required so ordinary users can't just substitute their own binaries of the same name as "allowed" programs. It might not be the most secure program written (although I've tried to avoid gaping holes), but it gets the job done for me. Regards jonathan