Translating from pid to node name

[Shawn Pearce]

I have a server process which is going to get the pid of another
process, most likely from another node (erts node).  How can I
translate that pid to the name of the node that its coming from? 

Specifically I want to advoid having to send the process a message to
request its node name.  :-)

--
Shawn.

  ``If this had been a real
    life, you would have
    received instructions
    on where to go and what
    to do.''