NetBSD/etc/rc.d/rtclocaltime

#!/bin/sh
#
# $NetBSD: rtclocaltime,v 1.5 2006/10/01 15:17:51 sketch Exp $
#

# PROVIDE: rtclocaltime
# REQUIRE: mountcritremote
# BEFORE:  ntpdate ntpd

$_rc_subr_loaded . /etc/rc.subr

name="rtclocaltime"
rcvar=$name
start_cmd="rtclocaltime_start"
stop_cmd=":"

rtclocaltime_start()
{
	rtcoff=$(date '+%z' | awk '{
		offset = int($1);
		if (offset < 0) {
			sign = -1;
			offset = -offset;
		} else {
			sign = 1;
		}
		minutes = offset % 100;
		hours = int(offset / 100);
		offset = sign * (hours * 60 + minutes);
		print (-1 * offset);
	}')
	echo "Setting RTC offset to ${rtcoff}."
	sysctl -qw kern.rtc_offset=${rtcoff}
}

load_rc_config $name
run_rc_command "$1"