emonhub

#! /bin/sh

###
#
#  This code is released under the GNU Affero General Public License.
#
#  OpenEnergyMonitor project:
#  http://openenergymonitor.org
#
###

### BEGIN INIT INFO
# Provides:          emonhub
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start/stop emonHub
### END INIT INFO

NAME=emonhub
DAEMONUSER="emonhub"
SYSCONF_PATH=/etc/default/

# If there's no configuration file, die!!
[ ! -f $SYSCONF_PATH$NAME ] && echo "Fatal: cannot find $SYSCONF_FILE$NAME config file!" && exit 1

# Pull in the config settings and echo them out for easy troubleshooting.
. $SYSCONF_PATH$NAME

[ ! -f $EMONHUB_CONFIG ] && echo "Fatal: cannot find $EMONHUB_CONFIG" && exit 1
[ ! -f $EMONHUB_PATH$NAME.py ] && echo "Fatal: cannot find $EMONHUB_PATH$NAME.py" && exit 1
[ ! -f $EMONHUB_LOG ] && sudo mkdir -p "$(dirname "$EMONHUB_LOG")" && sudo touch "$EMONHUB_LOG" && sudo chown -R $DAEMONUSER "$(dirname "$EMONHUB_LOG")"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="OpenEnergyMonitor emonHub"
# Enter your installation path here
DAEMON=$EMONHUB_PATH$NAME.py

# Specify command line arguments here
DAEMON_ARGS="--logfile $EMONHUB_LOG --config-file $EMONHUB_CONFIG"

PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

# Exit if the package is not installed
[ -x "$DAEMON" ] || echo "Not starting - cannot find $DAEMON" || exit 1

# Exit if not run as root
case `id -u` in 
	0) ;;
	*) echo "This script must be run as root" >&2; exit 1 ;;
esac

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
# Override VERBOSE setting
VERBOSE=yes

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start() {
	do_status
	case "$?" in
		0)	return 1 ;;
		1) 	rm -f $PIDFILE;;
		3)	;;
		4)	PID=`ps -ef | grep '[p]ython '$DAEMON | awk '{ print $2 }'`
			echo "$PID" > $PIDFILE;;
		*)	return "$?" ;;
	esac
	start-stop-daemon --start --quiet --background --make-pidfile --chuid=$DAEMONUSER --pidfile $PIDFILE --startas $DAEMON --test > /dev/null \
		|| return 1
	start-stop-daemon --start --quiet --background --no-close --make-pidfile --chuid=$DAEMONUSER --pidfile $PIDFILE --startas $DAEMON -- \
		$DAEMON_ARGS \
		|| return 2
	# Add code here, if necessary, that waits for the process to be ready
	# to handle requests from services started subsequently which depend
	# on this one.  As a last resort, sleep for some time.
}

#
# Function that stops the daemon/service
#
do_stop() {
	do_status
	case "$?" in
		0)	;;
		1) 	rm -f $PIDFILE;;
		3) 	return 1 ;;
		4)	PID=`ps -ef | grep '[p]ython '$DAEMON | awk '{ print $2 }'`
			echo "$PID" > $PIDFILE;;
		*)	return "$?" ;;
	esac
	start-stop-daemon --stop --quiet --retry=INT/30/KILL/5 --pidfile $PIDFILE >/dev/null || RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	rm -f $PIDFILE
	return "$?"
}

#
# Function that restarts the daemon/service
#
do_restart() {
	do_stop
		case "$?" in
			0|1) ;;
			*) return 2;;
		esac
	do_start
	[ "$?" = 0 ] && return 0
	return 2
}

#
# Function that status checks the daemon/service
#
do_status() {
	status="0"
    	pidofproc -p $PIDFILE $DAEMON >/dev/null || status="$?"
	if [ "$status" = 3 ]; then
		pid=`ps -ef | grep '[p]ython '$DAEMON | awk '{ print $2 }'`
		[ "$pid" != "" ] && return 4
	fi
	return $status
}

#
# Function that sends a SIGHUP to the daemon/service
#
#do_reload() {
	#
	# If the daemon can reload its configuration without
	# restarting (for example, when it is sent a SIGHUP),
	# then implement that here.
	#
#	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
#	return 0
#}

case "$1" in
  start)
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
	do_start
	case "$?" in
		0) [ "$VERBOSE" != no ] && log_progress_msg "has been started ok"
		   [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		1) [ "$VERBOSE" != no ] && log_progress_msg "is already running"
		   [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_progress_msg "start attempt" #failed
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
		*) [ "$VERBOSE" != no ] && log_progress_msg "error: $?"
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0) [ "$VERBOSE" != no ] && log_progress_msg "has been stopped ok"
		   [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		1) [ "$VERBOSE" != no ] && log_progress_msg "had already stopped"
		   [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_progress_msg "stop attempt" #failed
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
		*) [ "$VERBOSE" != no ] && log_progress_msg "error: $?"
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
	[ "$VERBOSE" != no ] && log_daemon_msg "Checking $DESC" "$NAME"
	do_status
	case "$?" in
		0) [ "$VERBOSE" != no ] && log_progress_msg "process is running"
		   [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		1) [ "$VERBOSE" != no ] && log_progress_msg "process has" #failed
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
		3) [ "$VERBOSE" != no ] && log_progress_msg "process not running"
		   [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		4) [ "$VERBOSE" != no ] && log_progress_msg "running but PID file has" #failed
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
		*) [ "$VERBOSE" != no ] && log_progress_msg "status unknown as checks" #failed
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  #reload|force-reload)
	#
	# If do_reload() is not implemented then leave this commented out
	# and leave 'force-reload' as an alias for 'restart'.
	#
	#log_daemon_msg "Reloading $DESC" "$NAME"
	#do_reload
	#log_end_msg $?
	#;;
  restart|force-reload)
	#
	# If the "reload" option is implemented then remove the
	# 'force-reload' alias
	#
	[ "$VERBOSE" != no ] && log_daemon_msg "Restarting $DESC" "$NAME"
	do_restart
	case "$?" in
		0) [ "$VERBOSE" != no ] && log_progress_msg "has been restarted ok"
		   [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_progress_msg "restart attempt has" #failed
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
		*) [ "$VERBOSE" != no ] && log_progress_msg "error: $?"
		   [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  killp)
  	# use only for crash testing - kills process without removing the pid file
  	# also used to "tidy up" a process that's missing it's pid file (eg if rmpid used)
    # can be commented out or deleted, (not included in "Usage" help list).
	pid=`ps -ef | grep '[p]ython '$DAEMON | awk '{ print $2 }'`
	[ "$pid" != "" ] && kill -9 "${pid:-}"
	;;
  rmpid)
    # use only for crash testing - removes the pid file without killing process
    # also used to "tidy up" a crashed process's redundant pid file (eg if killp used)
    # can be commented out or deleted, (not included in "Usage" help list).
	[ -e $PIDFILE ] && rm $PIDFILE
	;;
  *)
	#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

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