Date: Fri, 20 Jul 2001 10:59:29 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Julian Elischer <julian@elischer.org> Cc: current@FreeBSD.org Subject: RE: huh? in Selrecord(): what is this for? Message-ID: <XFMail.010720105929.jhb@FreeBSD.org> In-Reply-To: <3B5854E3.B6D9C86D@elischer.org>
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On 20-Jul-01 Julian Elischer wrote:
> void
> selrecord(selector, sip)
> struct proc *selector;
> struct selinfo *sip;
> {
> struct proc *p;
> pid_t mypid;
>
> mypid = selector->p_pid;
> if (sip->si_pid == mypid)
> return;
> if (sip->si_pid && (p = pfind(sip->si_pid))) {
>
>
> Why do we look up 'p' when we got it as an argument?
> (race condition detection?)
Err, we look up p when the selector pid isn't the pid in the selinfo. I.e.,
when we _didn't_ get p as an argument.
--
John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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