#!/bin/sh
#
# Setup cpufreq governor
#
# chkconfig: 2345 35 65
# description: this script can load cpufreq support for your CPU (not implemented) and \
#   sets up the default cpufreq governor specified in /etc/sysconfig/cpufreq-primitive. \
#   (It can be configured using alterator-.... -- not implemented.) \
#   Enabling this script won't harm any other complex cpufreq-controlling daemons \
#   started further (powersaved, cpufreqd, Gnome power management etc.), \
#   they will override the default governor.
#
# Initial version: imz@altlinux.org 2008-03-28.

WITHOUT_RC_COMPAT=1

# Source function library.
. /etc/init.d/functions

LOCKFILE=/var/lock/subsys/cpufreq-primitive
CONFFILE=/etc/sysconfig/cpufreq-primitive

setDefaultGovernor() {
    [[ -s "$CONFFILE" ]] || return 1
    . "$CONFFILE"

    [[ "$DEFAULTGOVERNOR" ]] || return 1

    action $"Setting default cpufreq governor: $DEFAULTGOVERNOR" \
	cpufreq-set -g "$DEFAULTGOVERNOR"
}

ensureGovernors() {
    action $"Loading support for all cpufreq governors" \
	modprobe --all cpufreq_{ondemand,conservative,powersave,userspace}
}

case "$1" in
    condrestart|condreload)
	# Nothing to do on condrestart because otherwise we could 
	# damage a custom cpufreq-policy.
	:
	;;
    start|restart|reload)
	# Ensure that all governors are loaded
	# (Gnome power manager doesn't want to load them itself and 
	# doesn't do his complex policy if they are not loaded. 
	# So we load them beforehand.)
	ensureGovernors
	# Read the config and set the values
	setDefaultGovernor && \
	    touch "$LOCKFILE"
	;;
    stop|condstop)
	# Nothing to do when stopping (perhaps save the current governor?).
	rm -f "$LOCKFILE"
		;;
    status)
	if [[ -f "$LOCKFILE" ]]; then
	    stat --format=$"This service was last time (re-)started at %y." "$LOCKFILE"
	    echo $"This doesn't mean there have not been perfomed any other (\"non primitive\") cpufreq policy changes since the given time."
	else
	    echo $"This service hasn't been started since stopped last time."
	    echo $"This does mean nothing at all (stopping the service doesn't affect the current cpufreq policy)."
	fi
	cpufreq-info
	exit 0
	;;
    *)
	msg_usage "${0##*/} {start|stop|restart|reload|status|condrestart|condreload|condstop}"
	exit 1
esac

exit 0