Hi, how can i add a sysctl variable under kern parent?

I modified sysctl.h to include my variable:

#define KERN_MYVAR 71

and change KERN_MAX.

I add { "myvar", CTLTYPE_STRING }, \

and i modified kern_sysctl.c with

CASE KERN_MYVAR:
return(sysctl_int etc.

I add int myvar=0 into kern_sysctl.c

I use some examples read into c source file, because i
have not been able to find some url or doc on Internet
where adding of sysctl variable is explained.

But when i recompile and reboot, this new variable doesn't
exists. Where's mistake?

Thanks.

Newbie wrote:
> Hi, how can i add a sysctl variable under kern parent?
> I use some examples read into c source file, because i
> have not been able to find some url or doc on Internet
> where adding of sysctl variable is explained.
>
> But when i recompile and reboot, this new variable doesn't
> exists. Where's mistake?

you have to change the userland sysctl program as well unless you have
written your own.