init script for fulcrum

fulcrum

# !/bin/sh
#
# chkconfig:    2345 80 30
# processname:  fulcrum
# description:  Fulcrum Unicorn process

PORT=5000
APP_ROOT=/home/fulcrum/fulcrum
UNICORN_PID=$APP_ROOT/tmp/unicorn.pid

check_pid() {
    if [ -f $UNICORN_PID ]; then
        PID=`cat $UNICORN_PID`
        STATUS=`ps aux | grep $PID | grep -v grep | wc -l`
    else
        STATUS=0
        PID=0
    fi
}

start() {
    cd $APP_ROOT
    check_pid
    if [ "$PID" -ne 0 -a "$STATUS" -ne 0 ]; then
        echo "Error! is currentry running!"
        exit 1
    else
        if [ `whoami` = root ];  then
            sudo -u fulcrum -H bash -l -c "unicorn_rails -c config/unicorn.rb -E production -p $PORT -D"
            echo "Fulcrum started"
        fi
    fi
}

stop() {
    cd $APP_ROOT
    check_pid
    if [ "$PID" -ne 0 -a "$STATUS" -ne 0 ]; then
        kill -QUIT `cat $UNICORN_PID`
        rm $UNICORN_PID
        echo "Fulcrum stopped"
    else
        echo "Error! not started!"
        exit 1
    fi
}

restart() {
    cd $APP_ROOT
    check_pid
    if [ "$PID" -ne 0 -a "$STATUS" -ne 0 ]; then
        echo "Restarting Fulcrum"
        kill -QUIT `cat $UNICORN_PID`
        rm $UNICORN_PID
        start
    else
        echo "Error not running"
        exit 1
    fi
}

status() {
    cd $APP_ROOT
    check_pid
    if [ "$PID" -ne 0 -a "$STATUS" -ne 0 ]; then
        echo "Unicorn with PID $PID is running"
    else
        echo "is not running"
        exit 1
    fi
}

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        restart
        ;;
    status)
        status
        ;;
    *)
        echo "Usage: sudo service fulcrum {start|stop|restart|reload}" >&2
        exit 1
        ;;
esac

Hello
Can you give me a hit how to install unicorn so that it works fulcrum ?