How to tell if a process exists

[Doug Gwyn]

In article <7733 at amelia.nas.nasa.gov> samlb at pioneer.arc.nasa.gov.UUCP (Sam Bassett RCS) writes:
-In article <1823 at necisa.ho.necisa.oz> boyd at necisa.ho.necisa.oz (Boyd Roberts) writes:
->Wrong.  RTFM --  kill(pid, 0)
-	Hmmm -- must be running Reverse Polish Unix down under, 'cause my
-manual sez: " kill [-sig] processid... ", and I've been doing it that way
-for a looooooooong time.

Doing what, incorrectly reading your manual?