>How about /dev/dsp? I have tried to run xmms and it
>was not working quite right. I then tried to run
>sndconfig and got a /dev/dsp is busy.
fuser should work just fine on device files
lnx01688:/tmp/work $/sbin/fuser -vu /dev/mixer
USER PID ACCESS COMMAND
/dev/mixer adam 1917 f.... xmixer