These are FreeBSD specific

init.d.FreeBSD/powerd

@@ -0,0 +1,34 @@
+#!/sbin/runscript
+# Copyright 2007-2008 Roy Marples <roy@marples.name>
+# All rights reserved. Released under the 2-clause BSD license.
+
+command=/usr/sbin/powerd
+command_args=${powerd_args}
+pidfile=/var/run/powerd.pid
+name="Power Control Daemon"
+
+depend()
+{
+	need localmount
+	use logger
+	after bootmisc
+}
+
+start_pre()
+{
+	if [ -n "${powerd_battery_mode}" ]; then
+		command_args="${command_args} -b ${powerd_battery_mode}"
+	fi
+	if [ -n "${powerd_ac_mode}" ]; then
+		command_args="${command_args} -a ${powerd_ac_mode}"
+	fi
+}
+
+stop_post()
+{
+	local level=$(sysctl -n dev.cpu.0.freq_levels |
+	    sed -e 's:/.*::')
+	if [ -n "${level}" ]; then
+		sysctl dev.cpu.0.freq="${level}" >/dev/null
+	fi
+}