Ports using -lossaudio still call open(2) to get a file descriptor.
They don't need it to change the volume, but expect various syscalls
to succeed. Using /dev/null ensures programs will continue to work
once /dev/mixer is disabled.
"go ahead" landry@ and naddy@
little flashing battery icon when the battery is about to die
so as long as we're talking to /dev/apm, store the battery level and
show when it changes ("Battery level changed to low")
