#! /bin/sh
### BEGIN INIT INFO
# Provides:          ondemand
# Required-Start:    $remote_fs $all
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: Set the CPU Frequency Scaling governor to "ondemand"
### END INIT INFO

# Don't run if we're going to start an Android LXC container:
test ! -f /etc/init/lxc-android-config.conf || exit 0

setvar PATH = "/sbin:/usr/sbin:/bin:/usr/bin"

source /lib/init/vars.sh
source /lib/lsb/init-functions

setvar AVAILABLE = ""/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors""
setvar DOWN_FACTOR = ""/sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor""

match $1 {
    with start
    	start-stop-daemon --start --background --exec /etc/init.d/ondemand -- background
        
    with background
	sleep 60 # probably enough time for desktop login

	test -f $AVAILABLE || exit 0
	read governors < $AVAILABLE
	match $governors {
		with *interactive*
			setvar GOVERNOR = ""interactive""
			break
			
		with *ondemand*
			setvar GOVERNOR = ""ondemand""
			match $(uname -m) {
				with ppc64*
					setvar SAMPLING = '100'
				
			}
			break
			
		with *powersave*
			setvar GOVERNOR = ""powersave""
			break
			
		with *
			exit 0
			
	}

	for CPUFREQ in [/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor]
	{
		test -f $CPUFREQ || continue
		echo -n $GOVERNOR > $CPUFREQ
	}
	if test -n $SAMPLING && test -f $DOWN_FACTOR {
		echo -n $SAMPLING > $DOWN_FACTOR
	}
	
    with restart|reload|force-reload
        echo "Error: argument '$1' not supported" >&2
        exit 3
        
    with stop
        
    with *
        echo "Usage: $0 start|stop" >&2
        exit 3
        
}