Date: Mon, 12 Jul 2010 22:17:01 +0200 From: Andreas Tobler <andreast-list@fgznet.ch> To: freebsd-hackers@freebsd.org Subject: sysctl question Message-ID: <4C3B783D.5050200@fgznet.ch>
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Dear all, I have an issue here, I do read a temperature sensor and I got a value back, in integer. This value is 'encoded', it contains the integer and the fractional part of the temperature I read. This is inside a kernel module. I offer a sysctl interface to read this value. Currently the access is done with sysctl_handle_int. In my userland application I can print this value with the following macro: FIX32TOPRINT(f) ((f) >> 16),((((f) & 0xffff) * 1000) >> 16) But now I wonder how can I teach the sysctl to print my tempreature the same way as my userland app does. Right now it looks this way: dev.sm.1.sensor.cpu_b_ad7417_amb.temp: 2736128 If I feed this 2736128 into the macro above I get this: 41.750 this is what I expect. Is this even possible? TIA for any pointer. Andreas
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