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    SubjectRe: Async IO
    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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