#! /bin/sh
# TODO verify with spuso theinit info
### BEGIN INIT INFO
# Provides:          tango-db
# Required-Start:    $syslog $remote_fs $network
# Should-Start:
# Required-Stop:     $null
# Should-Stop:
# Default-Start:     3 5
# Default-Stop:      0 1 2 6
# Short-Description: Tango control system database daemon
# Description:       TANGO is an object oriented distributed control system
#    It allows communication between TANGO device processes running on the same
#    computer or distributed over the network. These processes can
#    provide services to the control system all over the network, such as
#    hardware control or data processing. This script starts DataBaseds,
#    the TANGO database device server.
### END INIT INFO


# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     be verbose in local rc status and clear it afterwards
#      rc_status -v -r  ditto and clear both the local and overall rc status
#      rc_status -s     display "skipped" and exit with status 3
#      rc_status -u     display "unused" and exit with status 3
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num>
#      rc_reset         clear both the local and overall rc status
#      rc_exit          exit appropriate to overall rc status
#      rc_active        checks whether a service is activated by symlinks
#      rc_splash arg    sets the boot splash screen to arg (if active)
. /etc/rc.status

# Reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0	  - success
# 1       - generic or unspecified error
# 2       - invalid or excess argument(s)
# 3       - unimplemented feature (e.g. "reload")
# 4       - user had insufficient privileges
# 5       - program is not installed
# 6       - program is not configured
# 7       - program is not running
# 8--199  - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
# 
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signaling is not supported) are
# considered a success.

# Get the tango host information
TANGO_CONFIG=/etc/tangorc
# Get the mysql user & password
MYSQL_CONFIG=/etc/sysconfig/tango-db

[ -f $TANGO_CONFIG ] && . $TANGO_CONFIG
[ -f $MYSQL_CONFIG ] && . $MYSQL_CONFIG

TANGO_PORT=`echo $TANGO_HOST | awk -F ":" '{print $2}'`
DATABASE_BIN=/usr/bin/DataBaseds
DATABASE_ARGS="2 -ORBendPoint giop:tcp::$TANGO_PORT"
export MYSQL_HOST=$MYSQL_HOST
export MYSQL_USER=$MYSQL_USER
export MYSQL_PASSWORD=$MYSQL_PASSWORD
case "$1" in
    start)
  	echo -n $"Starting tango-db"
	# TODO: mysql available & not DataBase running
	#if [ `pgrep mysql`=0 ]; then
        #    echo -n "mysql is not running" 
	#    rc_failed 1
	#fi

	#if [ `pgrep Data`=0 ]; then
        #    echo -n "mysql is not running" 
	#    rc_failed 1
	#fi

	if [ -z $TANGO_HOST ]; then
		echo $"error: TANGO_HOST not set"
		rc_failed 1
	fi
	# TODO: how to set the user tangosys in a better way?
    	startproc -u tangosys $DATABASE_BIN $DATABASE_ARGS #>/dev/null 2>&1
	# Remember status and be verbose
	rc_status -v
	;;
    stop)
	echo -n "Shutting down tango-db "
	## Stop daemon with killproc(8) and if this fails
	## killproc sets the return value according to LSB.

	killproc -TERM $DATABASE_BIN

	# Remember status and be verbose
	rc_status -v
	;;
    restart)
	## Stop the service and regardless of whether it was
	## running or not, start it again.
	$0 stop
	$0 start

	# Remember status and be quiet
	rc_status
	;;
    status)
	echo -n "Checking for service tango-db "
	## Check status with checkproc(8), if process is running
	## checkproc will return with exit status 0.

	# Return value is slightly different for the status command:
	# 0 - service up and running
	# 1 - service dead, but /var/run/  pid  file exists
	# 2 - service dead, but /var/lock/ lock file exists
	# 3 - service not running (unused)
	# 4 - service status unknown :-(
	# 5--199 reserved (5--99 LSB, 100--149 distro, 150--199 appl.)
	
	# NOTE: checkproc returns LSB compliant status values.
	checkproc $DATABASE_BIN
	# NOTE: rc_status knows that we called this init script with
	# "status" option and adapts its messages accordingly.
	rc_status -v
	;;
    *)
	echo "Usage: $0 {start|stop|status|restart}"
	exit 1
	;;
esac
rc_exit