Hack to sysctl kern.osreldate, for ports cluster

[Conrad J. Sabatier]

On Sat, 8 Jan 2005 02:13:24 -0500, Craig Rodrigues
<rodrigc at crodrigues.org> wrote:

> Hi,
> 
> 
> On http://pointyhat.freebsd.org/errorlogs/ it states
> that sysctl should not be used to determine the
> version of FreeBSD, and that uname(1) or the OSVERSION
> variable should be used instead.
> 
> While a valid thing to do, this is another detail
> for port maintainers to keep track of.
> 
> 
> What do you think of this hack to sysctl,
> which cats /usr/include/sys/param.h to get the
> value of kern.osreldate, instead of going to
> the true kernel sysctl variable?

Well, while it's certainly a "doable" thing, don't you think it's just a
little bit dangerous?  What about when the source tree is not in sync
with the currently running kernel?

> --- sbin/sysctl/sysctl.c.orig	Sat Jan  8 01:34:41 2005
> +++ sbin/sysctl/sysctl.c	Sat Jan  8 01:57:13 2005
> @@ -568,8 +568,14 @@
>  					printf("%d", *(int *)p);
>  				else
>  					printf("%d.%dC", (*(int *)p - 2732) / 10, (*(int
>  					*)p - 2732) % 10);
> -			} else
> -				printf(hflag ? "%'d" : "%d", *(int *)p);
> +			} else {
> +#ifdef PORTS_HACK
> +				if (strcmp("kern.osreldate", name ) == 0) {
> +					system("awk '/^#define __FreeBSD_version/ {
> print $3 }' /usr/include/sys/param.h");+				} else
> +#endif /* PORTS_HACK */
> +					printf(hflag ? "%'d" : "%d", *(int *)p);
> +			}
>  			val = " ";
>  			len -= sizeof(int);
>  			p += sizeof(int);
> -- 
> Craig Rodrigues        
> rodrigc at crodrigues.org
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> 


-- 
Conrad J. Sabatier <conrads at cox.net> -- "In Unix veritas"