#!/bin/sh
### BEGIN INIT INFO
# Provides:          e-meter-gom-daemon
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# X-Start-Before:    kdm gdm xdm
# X-Stop-After:      kdm gdm xdm
# Default-Start:     2 3 4 5
# Default-Stop:      1
# Short-Description: Start the e-meter daemon
# Description:       e-meter values are polled and updated in the GOM
### END INIT INFO

set -e

NAME=e-meter-gom-daemon
DESC="t-gallery e-meter daemon"
EMETER_NODE="http://gom.bonn.t-gallery/sensors/e-meter/home"
LOGFILE="/var/log/e-meter-gom-daemon.log"
DAEMON_USER="webs"
DAEMON=$(which e-meter-gom-daemon)
VERBOSITY="--verbose"

PIDDIR=/var/run/e-meter-gom-daemon
PIDFILE=$PIDDIR/pid
#VERBOSITY="--quiet"
PARAMS="--logfile=${LOGFILE} ${EMETER_NODE}"

test -x $DAEMON || exit 0

# Get lsb functions
. /lib/lsb/init-functions
. /etc/default/rcS

start_it_up()
{
  if [ ! -d $PIDDIR ]; then
    mkdir -p $PIDDIR
    chown $DAEMON_USER $PIDDIR
    #chgrp $DAEMON_USER $PIDDIR
  fi

  touch $LOGFILE
  chown $DAEMON_USER $LOGFILE

  if [ -e $PIDFILE ]; then
    PIDDIR=/proc/$(cat $PIDFILE)
    if [ -d ${PIDDIR} -a  "$(readlink -f ${PIDDIR}/exe)" = "${DAEMON}" ]; then 
      log_success_msg "$DESC already started; not starting."
      return
    else
      log_success_msg "Removing stale PID file $PIDFILE."
      rm -f $PIDFILE
    fi
  fi

  log_daemon_msg "Starting $DESC" "$NAME"
  /sbin/start-stop-daemon --start --background $VERBOSITY \
    --make-pidfile --pidfile $PIDFILE \
    -c $DAEMON_USER --exec $DAEMON -- $PARAMS

  log_end_msg $?
}


shut_it_down()
{
  log_daemon_msg "Stopping $DESC" "$NAME"
  /sbin/start-stop-daemon $VERBOSITY --stop --retry 5 --oknodo \
    --pidfile $PIDFILE --user $DAEMON_USER
  # We no longer include these arguments so that start-stop-daemon
  # can do its job even given that we may have been upgraded.
  # We rely on the pidfile being sanely managed
  # --exec $DAEMON -- --system $EMETER_NODE
  log_end_msg $?
  rm -f $PIDFILE
}

case "$1" in
  start)
    start_it_up
    ;;
  stop)
    shut_it_down
    ;;
  restart)
    shut_it_down
    start_it_up
  ;;
  status)
    status_of_proc -p $PIDFILE $DAEMON $NAME && exit 0 || exit $?
    ;;
  *)
    log_success_msg "Usage: /etc/init.d/${NAME} {start|stop|restart|status}"
    exit 2
esac