Re: Async IO

R. Arvind[MIEL] (arvindr@miel.mot.com)
Mon, 3 Feb 1997 12:17:29 +0530

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Jurgen Botz wrote :
>
> In article <vyzraj29l7p.fsf@issan.informatik.uni-dortmund.de>,
> Andreas Schwab <schwab@LS5.informatik.uni-dortmund.de> wrote:
> >|> signal number 0 is unused
> >
> >No, it's not. It has a defined meaning (see kill(2)).
>
> Hmm, my kill(2) manpage (readhat 4.0) doesn't mention anything
> about signal number 0. Enlighten us?
>

As far as i know, signal 0 is used for error checking. no signal is
actually sent to the destination process. Its often used to check
for the existence of a particular pid.

-Arvind

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