#! /bin/sh
### BEGIN INIT INFO
# Provides:          ofdpa
# Required-Start:    $syslog platform-baseconf
# Required-Stop:     $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Broacom OF-DPA Daemon
### END INIT INFO

# Author: Rob Sherwood <rob.sherwood@bigswitch.com>

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC=" Broacom OF-DPA Daemon"
NAME=ofdpa
DAEMON=/usr/sbin/$NAME
DAEMON_ARGS="--options args"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

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

# Always be verbose loading this daemon
VERBOSE=1

# 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

PLAT_FILE=/etc/onl_platform
PLATFORM=`cat $PLAT_FILE`
if [ -z $PLATFORM ] ; then
    log_failure_msg "Failed: no platform in $PLAT_FILE"
    exit 0
elif [ ! -x "$DAEMON-$PLATFORM" ] ; then
    log_failure_msg "Failed: OF-DPA not supported for platform $PLATFORM"
    exit 0
fi

KERNEL_MODS=/lib/modules/`uname -r`/ofdpa/
MODS="linux-kernel-bde linux-user-bde"

#
# Function that starts the daemon/service
#
do_start()
{
    if [ ! -d $KERNEL_MODS ] ; then 
        log_error_msg "Error: OFDPA kernel modules not found in $KERNEL_MODS "
        exit 0
    fi 
    log_progress_msg "    --- Loading "
    log_progress_msg " linux-kernel-bde "
    insmod $KERNEL_MODS/linux-kernel-bde.ko $OFDPA_KERNEL_OPTIONS
    log_progress_msg " linux-user-bde "
    insmod $KERNEL_MODS/linux-user-bde.ko $OFDPA_USER_KMOD_OPTIONS
    # Create dev nodes
    log_progress_msg "; Creating devices " 
    [ -e /dev/linux-kernel-bde ] || mknod /dev/linux-kernel-bde c 127 0
    [ -e /dev/linux-user-bde ] || mknod /dev/linux-user-bde c 126 0
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	start-stop-daemon --start --make-pidfile --quiet --pidfile $PIDFILE --background \
        --exec $DAEMON-$PLATFORM  -- $OFDPA_DAEMON_OPTIONS > /dev/null  || return 1
    #start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON-$PLATFORM -- \
    #	$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()
{
	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --exec $DAEMON-$PLATFORM
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON-$PLATFORM
	[ "$?" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
    log_progress_msg "    --- Removing old OFDPA kernel modules"
    for mod in `echo $MODS | tr ' ' '\n' | sort -r` ; do
        log_progress_msg "$mod"
        rmmod $mod
    done
	return "$RETVAL"
}

#
# 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 "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
	status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
	;;
  #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
	#
	log_daemon_msg "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
		# Failed to stop
		log_end_msg 1
		;;
	esac
	;;
  *)
	#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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