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Date: Tue, 15 Jan 2008 13:20:16 +0300
From: Stanislav Sedov <stas@FreeBSD.org>
To: Jeremy Chadwick <koitsu@FreeBSD.org>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Examples of sysctl/sysctlbyname/sysctlnametomib?
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On Mon, Jan 14, 2008 at 05:24:40AM -0800 Jeremy Chadwick mentioned:
> 
> I'm attempting to retrieve the integer values for dev.cpu.X.temperature.
> For example, using sysctlbyname("dev.cpu.X.temperature") does work, but
> the results returned in *oldp don't match that of what sysctl(8) shows.
> This lead me to consider using sysctlnametomib("dev.cpu.X"), which also
> returns success, but from there I'm confused...
> 

sysctl converts temperature values to Celsius or Farenheit according to
locale, e.g.:
	printf("%.1fC", (mv - 2732.0) / 10);

When you retrive value using sysctlbyname, it's raw number, and it'll
differ from what sysctl displays.

-- 
Stanislav Sedov
ST4096-RIPE