acpufreq.is

#!/bin/sh
### BEGIN INIT INFO
# Provides:       auto cpu frequency
# Required-Start: $remote_fs
# Required-Stop:  $remote_fs
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Description:    Auto cpu frequency daemon
### END INIT INFO
DAEMON=placeholder/sbin/afreq
DAEMON_ARGS=""
RUN_AS_USER=root
NAME=${DAEMON##*/}
PIDFILE=/var/run/acpufreq.pid
RELOAD_SIGNAL="HUP"

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

# PATH should only include /usr/* if it runs after the mountnfs.sh
# script.  Scripts running before mountnfs.sh should remove the /usr/*
# entries.
PATH=/usr/sbin:/usr/bin:/sbin:/bin
export PATH

# If the daemon is not there, then exit.
if ! [ -x ${DAEMON} ] ; then
    log_failure_msg "Cannot find an executable at ${DAEMON}"
    exit 1
fi

case $1 in
    start)
        # Check if pidfile exists
        if [ -e ${PIDFILE} ]; then
            # Check the actual status of process
            status_of_proc -p ${PIDFILE} ${DAEMON} ${NAME} && status="0" || status="$?"
            # If the status is successfull, no need to start again.
            [ ${status} = "0" ] && exit 0
        fi
        # Start the daemon.
        log_daemon_msg "Starting ${NAME}" "$DAEMON"
        # Start the daemon with the help of start-stop-daemon
        start-stop-daemon -S --quiet --oknodo --pidfile ${PIDFILE} --make-pidfile --background \
            --chuid ${RUN_AS_USER} --startas ${DAEMON} -- ${DAEMON_ARGS}
        if [ "$?" = "0" ]; then
            log_end_msg 0
        else
            log_end_msg 1
        fi
        ;;
    stop)
        if [ -e ${PIDFILE} ]; then
            status_of_proc -p ${PIDFILE} ${DAEMON} ${NAME} && status="0" || status="$?"
            if [ "$status" = "0" ]; then
                log_daemon_msg "Stopping ${NAME}" "$DAEMON"
                start-stop-daemon -K --signal TERM --quiet --oknodo --pidfile ${PIDFILE}
                if [ "$?" = "0" ]; then
                    log_end_msg 0
                    rm -rf ${PIDFILE}
                else
                    log_end_msg 1
                fi
            fi
        else
            log_daemon_msg "${NAME} is not running"
            log_end_msg 0
        fi
        ;;
    restart)
        $0 stop && sleep 3 && $0 start
        ;;
    status)
        # Check the status of the process.
        if [ -e ${PIDFILE} ]; then
            status_of_proc -p ${PIDFILE} ${DAEMON} ${NAME} && exit 0 || exit $?
        else
            log_daemon_msg "${NAME} is not running (no pidfile)"
            log_end_msg 0
        fi
        ;;
    reload)
        if [ -e ${PIDFILE} ]; then
            log_daemon_msg "Reloading ${NAME}" 
            start-stop-daemon -K --quiet --signal ${RELOAD_SIGNAL:-USR1} --pidfile ${PIDFILE}
            if [ "$?" = "0" ]; then
                log_end_msg 0
            else
                log_end_msg 1
            fi
        else
            log_failure_msg "Cannot find pidfile at ${PIDFILE}"
        fi
        ;;
    *)
        # Invalid argument, print the usage message.
        echo "Usage: $0 {start|stop|restart|reload|status}"
        exit 2
        ;;
esac