Date: Tue, 07 Sep 1999 15:49:25 -0600 From: Chris Fedde <cfedde@fedde.littleton.co.us> To: Alfred Perlstein <bright@wintelcom.net> Cc: Decebal Topala <decebal@mail.md>, questions@FreeBSD.ORG Subject: Re: don't fork bomb Message-ID: <199909072149.PAA11621@fedde.littleton.co.us> In-Reply-To: Your message of "Tue, 07 Sep 1999 10:14:23 -0000." <Pine.BSF.4.05.9909071006260.6392-100000@fw.wintelcom.net>
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Alfred,
Let me apologize in advance for (ab)using your post to reply to Decebal
Topala.
Alfred Perlstein writes:
On Tue, 7 Sep 1999, Decebal Topala wrote:
> Hi
>
> I used an script to ping all ip addresses in my ocal ip subnet.
> I was very slow. In order to make this faster i put ping process in
> baground. After 15 second system is dumpimg.
can you please tell us the panic message?
Decebal
If the goal is to run a ping sweep then there are better tools than ping(1)
for this. I'd recommend looking at fping in the ports collection.
for f in `jot 255`
do
for g in `jot 255`
do
echo 10.0.$f.$g
done
done | /usr/local/sbin/fping
Much faster, easier to process the output and very much lower resource
utilization than forking for every address. Even with Alfred's
optimization of waiting on 254 process boundaries.
chris
__
Chris Fedde <cfedde@fedde.littleton.co.us>
303 773 9134
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