Date: Sat, 6 Aug 2005 09:04:23 +0200 From: Jeremie Le Hen <jeremie@le-hen.org> To: "Thordur I. Bjornsson" <thib@mi.is> Cc: freebsd-hackers@freebsd.org Subject: Re: Checking sysctl values from within the kernel. Message-ID: <20050806070422.GW45385@obiwan.tataz.chchile.org> In-Reply-To: <20050805160415.44b0b05e.thib@mi.is> References: <20050805005543.5bd947f2.thib@mi.is> <20050805145046.GB78669@dan.emsphone.com> <42F386B2.1010108@samsco.org> <20050805160415.44b0b05e.thib@mi.is>
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Hi Thordur,
> PS: If you don't mind, what is a "real accessor function" ?
This is a function acting as a wrapper for accessing an integer
declared as static. This function must of course live in the same
file. This may be something like this, there may exist neater
interfaces though :
static int age;
int
age_accessor(int *get, int set)
{
if (get != NULL)
*get = age;
else if (set < 0 || set > 125)
return -1;
else
age = set;
return 0;
}
If `get' is not NULL, this means the caller wants to retrieve the
current age value. Else, this means the caller wants to set the age
value to a new one : if the latter is lower than 0 and greater than
125, this is an incredible age and the accessor reports an error.
Else it sets the new value.
I hope this helped.
Regards,
--
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >
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