How can I check from Ruby whether a process with a certain pid is running?

Question

If there is more than one way, please list them. I only know of one, but I\'m wondering if there is a cleaner, in-Ruby way.

Answer 1

@John T, @Dustin: Actually, guys, I perused the Process rdocs, and it looks like

Process.getpgid( pid )

is a less violent means of applying the same technique.