Pstree using sys/proctable?

I'm looking for a ruby-based implementation of "pstree" using
sys/proctable. I haven't found anything like this on the net, and so
I'm about to write my own version.

But before I go off an reinvent the wheel, does anyone know of such a
thing that might already have been written?

Thanks in advance.


Lloyd Zusman
God bless you.