kill(pid,0) sends a signal or not?

[Koryn Grant]

On Sun, 20 Jun 2004, Sean McNeil wrote:

> Any info on how threads are suppose to behave when a process does a
> kill(pid,0) would be greatly appreciated.

The Single Unix Specification speaks thusly about kill():

"If sig is 0 (the null signal), error checking is performed but no signal is
actually sent. The null signal can be used to check the validity of pid."

Cheers,
Koryn