#!/bin/sh
#
# avr_evtd Linkstation/Kuro AVR daemon
#
# Other files used are:
#  /etc/default/avr_evtd - Optional configuration file
#  /etc/avr_evtd/EventScript - Provides user with scripted
#                              AVR event points
# Optional files:
#  /etc/melco/timer_Sleep - Standard Melco sleep settings
#
# Written by Bob Perry (2006) lb-source@users.sourceforge.net
#

#
# Location of the avr watchdog daemon and the init directory
#
DAEMON=/usr/sbin/avr_evtd
initdir=/etc/init.d

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin
tag=linkstation
facility=user.info

test -e $DAEMON || exit 0

getDevice()
{
  #
  # Load custom settings
  #
  MIPS=NO

  #
  # Populate the configured settings
  #
  [ -f /etc/default/avr_evtd ] && . /etc/default/avr_evtd > /dev/null 2>&1

  # Try and determine the UART used.  The MIPS only has one UART
  # available and the process is built accordingly.  To support modified
  # kernel's/kuro systems with polled over UARTs, drill into kernel
  # configuration for the memory configuration of the UART to determine
  # which tty to use if not set in the configuration file
  uname -m | grep -q mips && MIPS=YES && DEVICE=/dev/ttyS0

  if [ -z "$DEVICE" ] && [ "$MIPS" = "NO" ]
  then
    DEVICE=/dev/ttyS0
    # Search for valid port address
    PORT_ADDRESS=`$DAEMON -i -d /dev/ttyS1`
    if [ $PORT_ADDRESS -eq 80004500 ] ; then DEVICE=/dev/ttyS1 ; fi
  fi
}

start()
{
  #
  # Daemon options
  # e.g -d /dev/ttyS1
  #
  daemonoptions=

  CONSOLE=OFF
  
  getDevice
  
  # Establish daemon startup options based on configuration settings
  if [ "$EMMODE" = "YES" ]; then daemonoptions=-e ; fi
  
  if [ -n "$DEVICE" ] && [ "$MIPS" = "NO" ]
  then
    [ -n "$daemonoptions" ] && daemonoptions="$daemonoptions "
    daemonoptions="$daemonoptions-d $DEVICE"
  fi

  # Is this a MIPSEL box?
  if [ "$MIPS" = "YES" ]
  then
    if [ -e /proc/linkstation ]
    then
      # Determine if console ttyS0 is in-use
      CONSOLE=`cat /proc/linkstation | grep CONSOLE | awk -F "=" '{print $2}'`
    fi
  fi

  if [ "$CONSOLE" = "ON" ]
  then
    echo "[avr_evtd]: Not started services as console in-use"
    logger -t $tag -p $facility 'Not started avr_evtd as kernel still has console'
  else
    echo "Start services: avr_evtd"
    /sbin/start-stop-daemon --start --quiet --exec $DAEMON -- $daemonoptions
    logger -t $tag -p $facility 'Started daemon avr_evtd'
  fi
}

stop()
{
  echo "Stop services: avr_evtd"
  /sbin/start-stop-daemon --stop --quiet --exec $DAEMON
  logger -t $tag -p $facility 'Stopped daemon avr_evtd'
}

# Check request
case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    stop
    sleep 1
    start
    ;;
  *)
    echo "Usage: $DAEMON {start|stop|restart}" >&2
    ;;
esac

exit 0