opennsa

#! /bin/sh
# /etc/init.d/opennsa: Start the OpenNSA service

### BEGIN INIT INFO
# Provides:             opennsa
# Required-Start:       $network
# Required-Stop:        $network
# Should-Start:         $time
# Should-Stop:          $time
# Default-Start:        2 3 4 5
# Default-Stop:         0 1 6
# Short-Description:    OpenNSA Service
### END INIT INFO

. /lib/lsb/init-functions

CONFIG_FILE=/etc/opennsa.conf

PIDFILE=/var/run/opennsa.pid

DEFAULT_USER=root

APP_START="from opennsa import setup ; application = setup.createApplication()"

do_start() {
    # get runtime user from config file or set to root if not found
    USER=`grep ^user= $CONFIG_FILE | tail -n 1 | cut -f2 -d'='`
    USER=${USER:-$DEFAULT_USER}
    USER_ID=`id -u $USER`
    GROUP_ID=`id -g $USER`

    # setup .tac file in temporary file (saves us a file in the distro and more importantly getting the location in this script).
    TACFILE=`mktemp` || exit 1
    echo $APP_START > $TACFILE

    # start the opennsa service using twistd
    twistd --pidfile $PIDFILE -y $TACFILE -u $USER_ID -g $GROUP_ID
}

do_stop() {
    kill `cat $PIDFILE` || rm $PIDFILE
}

case "$1" in
  start)
    echo "Starting OpenNSA service"
    do_start
    ;;
  stop)
    echo "Stopping OpenNSA service"
    do_stop
    ;;
  restart|reload)
    echo "Restarting OpenNSA service"
    do_stop
    sleep 1 # erhmm...
    do_start
    ;;
  status)
    status_of_proc -p $PIDFILE "twistd" "OpenNSA service" && exit 0 || exit $?
    ;;
  *)
    echo "Usage: $0 {start|stop|restart|reload|status}"
    exit 1
    ;;
esac

exit 0