From owner-freebsd-current  Thu Sep 24 06:44:32 1998
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Date: Thu, 24 Sep 1998 09:43:53 -0400 (EDT)
From: Brian Tao <taob@risc.org>
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To: Robert Watson <robert+freebsd@cyrus.watson.org>
cc: FREEBSD-CURRENT <freebsd-current@FreeBSD.ORG>
Subject: Re: Limit 'ps' to show only user's processes
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On Fri, 18 Sep 1998, Robert Watson wrote:
> 
> I don't think there is any way to hide the existence of other
> processes -- a process that performs:
> 
> int i, lasti;
> while (1) {
> 	i = fork();
> 	if (!i) {
> 		exit(0);
> 	}
> 	if (i != lasti + 1) {
> 		
> ....

    On a slightly different track, using randomized pid's would limit
the usefulness of such a scan, although with a fast enough fork(), you
could still map the entire pid space and find the "holes".
-- 
Brian Tao (BT300, taob@risc.org)
"Though this be madness, yet there is method in't"


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