nodejs

#!/bin/sh
 
#
# description: This script runs a node.js instance for a specific user & application.
# The idea is to allow multiple userland node.js instances.
# 
# Run with /etc/init.d/node start USERNAME [USERHOME]
# Above will launch the node.js instance in HOME/app/app.js
#
 
. /etc/rc.d/init.d/functions
 
USER=${2:-"username"}
 
DAEMON="/usr/bin/node"
ROOT_DIR=${3:-"/home/$USER"}
 
SERVER="$ROOT_DIR/app/app.js"
LOG_FILE="$ROOT_DIR/node.log"
 
LOCK_FILE="$ROOT_DIR/node.lock"
 
do_start()
{
if [ ! -f "$LOCK_FILE" ] ; then
echo -n $"Starting $SERVER: "
runuser -s /bin/sh -l "$USER" -c "$DAEMON $SERVER >> $LOG_FILE 2>&1 &"
RETVAL=$?
PID=`ps -aefw | grep "$DAEMON $SERVER" | grep -v " grep " | awk '{print $2}'`
echo
[ $RETVAL -eq 0 ] && echo "$PID" > "$LOCK_FILE"
else
echo "$SERVER is locked."
RETVAL=1
fi
}
do_stop()
{
echo -n $"Stopping $SERVER: "
pid=`cat $LOCK_FILE`
kill -9 $pid > /dev/null 2>&1 && echo_success || echo_failure
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $LOCK_FILE
}
 
case "$1" in
start)
do_start
;;
stop)
do_stop
;;
restart)
do_stop
do_start
;;
*)
echo "Usage: $0 {start|stop|restart}"
RETVAL=1
esac
 
exit $RETVAL

}
do_stop()
{
        echo -n $"Stopping $SERVER: "
        pid=`ps -aefw | grep "$DAEMON $SERVER" | grep -v " grep " | awk '{print $2}'`
        kill -9 $pid > /dev/null 2>&1 && echo_success || echo_failure
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && rm -f $LOCK_FILE
}

case "$1" in
        start)
                do_start
                ;;
        stop)
                do_stop
                ;;
        restart)
                do_stop
                do_start
                ;;
        *)
                echo "Usage: $0 {start|stop|restart}"
                RETVAL=1
esac

exit $RETVAL