Call function on sysctl value change

[Matthew Jakeman]

Hi all,

I was wondering if it is possible to call a function when a sysctl value is 
changed. I have added a few sysctl int variables to the kernel and for some 
of these i only want certain values to be acceptable as input depending on 
some conditions. I would like to be able to call a function if possible, to 
validate the value entered via the sysctl command.

Thanks in advance
Matt