List currently running sub-processes (typically these will be some form of asynchronously launched rt render.)
Example 1. List Currently Running Processes
mged>
ps
PID CMD
5524692 rt -M -u model /home/user/test.g
6515118 rtcheck -M /home/user/test.g obj
Reports of bugs or problems should be submitted via electronic
mail to <devs@brlcad.org>