#!/bin/sh
#
# chkconfig: 35 90 12
# description: Icinga 2
#
### BEGIN INIT INFO
# Provides:          icinga2
# Required-Start:    $remote_fs $syslog $network
# Required-Stop:     $remote_fs $syslog $network
# Should-Start:      mysql postgresql
# Should-Stop:       mysql postgresql
# Default-Start:     2 3 5
# Default-Stop:      0 1 6
# Short-Description: icinga2 host/service/network monitoring and management system
# Description:       Icinga 2 is a monitoring and management system for hosts, services and networks.
### END INIT INFO

# load system specific defines
SYSCONFIGFILE=@ICINGA2_SYSCONFIGFILE@
if [ -f $SYSCONFIGFILE ]; then
	. $SYSCONFIGFILE
else
	echo "Can't load system specific defines from $SYSCONFIGFILE."
	exit 6
fi

test -x $DAEMON || exit 5

if [ ! -e $ICINGA2_CONFIG_FILE ]; then
	echo "Config file '$ICINGA2_CONFIG_FILE' does not exist."
	exit 6
fi

if [ ! $ICINGA2_USER ]; then
	echo "Could not fetch \$ICINGA2_USER. Exiting."
	exit 6
fi

if [ ! $ICINGA2_GROUP ]; then
	echo "Could not fetch \$ICINGA2_GROUP. Exiting."
	exit 6
fi

getent passwd $ICINGA2_USER >/dev/null 2>&1 || (echo "Icinga user '$ICINGA2_USER' does not exist. Exiting." && exit 6)
getent group $ICINGA2_GROUP >/dev/null 2>&1 || (echo "Icinga group '$ICINGA2_GROUP' does not exist. Exiting." && exit 6)
getent group $ICINGA2_COMMAND_GROUP >/dev/null 2>&1 || (echo "Icinga command group '$ICINGA2_COMMAND_GROUP' does not exist. Exiting." && exit 6)

# Get function from functions library
if [ -f /etc/rc.d/init.d/functions ]; then
	. /etc/rc.d/init.d/functions
elif [ -f /etc/init.d/functions ]; then
	. /etc/init.d/functions
fi

# Load extra environment variables
if [ -f /etc/default/icinga2 ]; then
	. /etc/default/icinga2
fi

# Start Icinga 2
start() {
	printf "Starting Icinga 2: "
	@CMAKE_INSTALL_PREFIX@/lib/icinga2/prepare-dirs $SYSCONFIGFILE

	if ! $DAEMON daemon -c $ICINGA2_CONFIG_FILE -d -e $ICINGA2_ERROR_LOG > $ICINGA2_STARTUP_LOG 2>&1; then
		echo "Error starting Icinga. Check '$ICINGA2_STARTUP_LOG' for details."
		exit 1
	else
		echo "Done"
	fi
}

# Restart Icinga 2
stop() {
	printf "Stopping Icinga 2: "

	if [ ! -e $ICINGA2_PID_FILE ]; then
		echo "The PID file '$ICINGA2_PID_FILE' does not exist."
		if [ "x$1" = "xnofail" ]; then
			return
		else
			exit 7
		fi
	fi

	pid=`cat $ICINGA2_PID_FILE`

	if icinga2 internal signal -s SIGINT -p $pid >/dev/null 2>&1; then
		for i in 1 2 3 4 5 6 7 8 9 10; do
		if ! icinga2 internal signal -s SIGCHLD -p $pid >/dev/null 2>&1; then
				break
			fi
		
			printf '.'
			sleep 3
		done
	fi

	if icinga2 internal signal -s SIGCHLD -p $pid >/dev/null 2>&1; then
		icinga2 internal signal -s SIGKILL -p $pid >/dev/null 2>&1
	fi

	echo "Done"
}

# Reload Icinga 2
reload() {
	exec @CMAKE_INSTALL_PREFIX@/lib/icinga2/safe-reload $SYSCONFIGFILE
}

# Check the Icinga 2 configuration
checkconfig() {
	printf "Checking configuration: "

	if ! $DAEMON daemon -c $ICINGA2_CONFIG_FILE -C > $ICINGA2_STARTUP_LOG 2>&1; then
		if [ "x$1" = "x" ]; then
			cat $ICINGA2_STARTUP_LOG
			echo "Icinga 2 detected configuration errors. Check '$ICINGA2_STARTUP_LOG' for details."
			exit 1
		else
			echo "Not "$1"ing Icinga 2 due to configuration errors. Check '$ICINGA2_STARTUP_LOG' for details."
			if [ "x$2" = "xfail" ]; then
				exit 1
			fi
		fi
	fi

	echo "Done"
	# no arguments requires full output
	if [ "x$1" = "x" ]; then
		cat $ICINGA2_STARTUP_LOG
	fi
}

# Print status for Icinga 2
status() {
	printf "Icinga 2 status: "

	if [ ! -e $ICINGA2_PID_FILE ]; then
		echo "Not running"
		exit 7
	fi

	pid=`cat $ICINGA2_PID_FILE`
	if icinga2 internal signal -s SIGCHLD -p $pid >/dev/null 2>&1; then
		echo "Running"
	else
		echo "Not running"
		exit 7
	fi
}

### main logic ###
case "$1" in
  start)
	checkconfig start fail
	start
  ;;
  stop)
	stop
	;;
  status)
	status
  ;;
  restart)
	checkconfig restart fail
	stop nofail
	start
  ;;
  condrestart)
	status > /dev/null 2>&1 || exit 0
	checkconfig restart fail
	stop nofail
	start
  ;;
  reload)
	reload
  ;;
  checkconfig)
	checkconfig
  ;;
  *)
	echo "Usage: $0 {start|stop|restart|reload|checkconfig|status}"
	exit 3
esac

exit 0