How to prevent perl from using system() or exec() functions.

[Dmitriy Tarasov]

Hello.
Does anyone know how to prevent perl from using the system() or exec() functions? In order to solve the problem I was trying to enable server wide taint checking with the -T flag. I added into httpd.conf:
<IfModule mod_perl>
PerlSwitches -wT
</IfModule>
But after that I could not restart apache. I use Apache 1.3
And how to prevent perl from reading system files?
Regards, Dmitriy.