smart_spindown_init

#! /bin/sh
#
# smart_spindown startup/stop script


SVCNAME=smart_spindown
SMART_SPINDOWN_SCRIPT=/usr/sbin/smart_spindown
SMART_SPINDOWN_LOG=/mnt/ramdisk/smart_spindown.log
SMART_SPINDOWN_PID=/var/run/$(basename ${SMART_SPINDOWN_SCRIPT}).pid

checkconfig() {
    if [ ! -r $SMART_SPINDOWN_SCRIPT ] ; then
        echo "Spindown script not found at $SMART_SPINDOWN_SCRIPT"
        return 1
    fi

    for A in dirty_expire_centisecs dirty_writeback_centisecs dirty_ratio dirty_background_ratio laptop_mode swappiness ; do
        if [ ! -w /proc/sys/vm/$A ] ; then
            echo "VM config /proc/sys/vm/$A not writable"
            return 1
        fi
    done
}


start() {
    checkconfig || return 1
    echo "Starting ${SVCNAME}"

    echo 0 > /proc/sys/vm/dirty_expire_centisecs
    echo 0 > /proc/sys/vm/dirty_writeback_centisecs
    echo 95 > /proc/sys/vm/dirty_ratio
    echo 10 > /proc/sys/vm/dirty_background_ratio
    echo 5 > /proc/sys/vm/laptop_mode
    echo 40 > /proc/sys/vm/swappiness
    start-stop-daemon --start --background --quiet \
        --pidfile ${SMART_SPINDOWN_PID} --make-pidfile \
        --exec ${SMART_SPINDOWN_SCRIPT}

}

stop() {
    echo "Stopping ${SVCNAME}"

    # "echo" before start-stop-deamon,
    # so we get the error code of s-s-d as exit code
    echo 3000 > /proc/sys/vm/dirty_expire_centisecs
    echo 500  > /proc/sys/vm/dirty_writeback_centisecs
    echo 40 > /proc/sys/vm/dirty_ratio
    echo 10 > /proc/sys/vm/dirty_background_ratio
    echo 0 > /proc/sys/vm/laptop_mode
    echo 60 > /proc/sys/vm/swappiness
    start-stop-daemon --stop --quiet --pidfile ${SMART_SPINDOWN_PID}
}

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
    *)
        echo $"Usage: $0 {start|stop|restart}"
        exit 1
        ;;
esac

exit $?