Re: bg proccess limit

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To: freebsd-isp@freebsd.org
Date: Mon, 10 May 2004 08:52:44 -0500

"Coldfade" <coldfade@levkov.com> wrote:
> i mean limit the background proccesses amount ... i work in a shell
> providing company but can`t find suitable solution for the BSD
> platform

This is a Simple Matter of Scripting. Start with:

ps -x -U $THEUSER | egrep '^[0-9]+ +\?\?'

to find processes owned by THEUSER with no controlling terminal (?? in the TT
column in ps). You can use egrep -c to count the processes, then pipe the
results of the same grep through tail to find some processes to kill off.
Run that once a minute and you're set.

For a nicer fix, I'd go to Perl or Python - just run ps aux once, store the
results into a hash of arrays (dictionary of lists) by username, then go
through that hash/dict, comparing it to your policies, and kill off processes
that are over the limit.

You could also use ulimit, but that will only let you limit the total number
of processes (instead of the number of background processes.) Still, for
most users, the number of background processes allowed plus two or three will
be sufficient.

HTH,
Mark
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