Node init.d service script

node

#!/usr/bin/env bash

###############
# SysV Init Information
# chkconfig: - 58 74
# description: node daemon.
### BEGIN INIT INFO
# Provides: node
# Required-Start: 
# Required-Stop: 
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: manage node daemon
# Description: node daemon
### END INIT INFO


HOME=/opt/node
PATH=$PATH:/usr/local/bin
EXEC=/usr/local/bin/supervisor
PIDFILE=/var/run/node.pid
NAME="node"

LOG_SRC=/var/log/node

[ ! -d "${LOG_SRC}" ] && mkdir -p "${LOG_SRC}"


case "$1" in
    start)
        #
        # Check if port is free
        #
        PORT_STATUS=`netstat -lnt | awk '$6 == "LISTEN" && $4 ~ ".3000"'`

        if [[ -n ${PORT_STATUS} ]]; then
            echo "Port ${PORT} is in use. Not starting"
            exit 5;
        fi

        if [ -f ${PIDFILE} ]
        then
            PID=$(cat ${PIDFILE})
            PS=`ps -Fp ${PID} | wc -l`

            if [ ${PS} -gt 1 ]; then
                echo "$PIDFILE exists, process is running"
                exit 1;
            else
                echo "$PIDFILE exists, removing it."
                rm ${PIDFILE}
            fi
        fi

        echo "Starting $NAME server..."
        cd $HOME
        nohup ${EXEC} -pid ${PIDFILE} index.js &> ${LOG_SRC}/error.log < /dev/null &

#        echo $! > ${PIDFILE}
        ;;
    stop)
        if [ ! -f ${PIDFILE} ]
        then
            echo "$PIDFILE does not exist, process is not running"
        else
            PID=$(cat $PIDFILE)

            echo "Stopping $PID..."

            PS=`ps -Fp ${PID} | wc -l`

            if [ 1 -gt ${PS}  ]; then
                echo "No such process"    
                rm ${PIDFILE}
                exit 4;
            fi

            kill ${PID}

            while [ -x /proc/${PID} ]
            do
                PS=`ps -Fp ${PID} | wc -l`
                if [ 1 -gt ${PS} ]; then
                    rm ${PIDFILE}
                fi

                echo "Waiting for $NAME to shutdown ..."
                sleep 1
            done
            #
            # No pid, so just remove the file
            #
            [[ -f ${PIDFILE} ]] && rm ${PIDFILE}
            echo "$NAME stopped"
        fi
        ;;
    status)
        if [ ! -f ${PIDFILE} ]
        then
            echo "$NAME is not running"
        else
            echo "$NAME is running ($(<${PIDFILE}))"
        fi
        ;;
    restart)
        $0 stop
        $0 start
        ;;
    *)
        echo "Please use start, stop, restart or status as first argument"
        ;;
esac