Date: Mon, 22 Oct 2007 20:31:58 -0400
From: Mike Jeays <mike.jeays@rogers.com>
To: freebsd-questions@freebsd.org
Subject: Re: defend from -> :() { :&:; } ;:
Message-ID: <200710222031.58924.mike.jeays@rogers.com>
In-Reply-To: <471D00EB.2030903@lazlarlyricon.com>
References: <123275.56819.qm@web30812.mail.mud.yahoo.com> <471D00EB.2030903@lazlarlyricon.com>
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On October 22, 2007 03:58:35 pm Rolf G Nielsen wrote:
> Danielisz Laszlo wrote:
> > Please do not try to execute this: :() { :&:; } ;: on your BSD machine.
> > I ask all who already tried it how to defend from this?
> >
> >
> >
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> What does it do?
It is easier to understand when you replace the ":" by a more conventional
subroutine name.
myproc () {
myproc &
myproc
}
myproc
It recursively generates useless processes that clog up the machine. Mine
ground to a halt and froze after a few seconds.
--
Mike Jeays
http://www.jeays.ca
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