Call function on sysctl value change
Oliver Fromme
olli at lurza.secnetix.de
Wed Oct 15 14:17:33 UTC 2008
Matthew Jakeman wrote:
> 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.
Yes, you can do this with a "PROC" type sysctl. For example,
look at sysctl_hlt_cpus() in sys/i386/i386/mp_machdep.c.
Best regards
Oliver
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