#!/bin/sh
#------------------------------------------------------------------------------
# Copyright (C) 2006 by EUMETSAT
#------------------------------------------------------------------------------
#
# Project:            EUMETCast
#
# Component:          Reception Station
#
# Module:             monitor-eku-decoding
#
# Author:             Anthony Patchett
#
# Creation Date:      26/06/2006
#
#------------------------------------------------------------------------------
#
#   001   Patchett    26/06/2006   Initial version
#
#------------------------------------------------------------------------------
#
# Monitors the EKU decoding
#
# If the penultimate line of the tellicast client log file contains the string
# "Failed to decode key", there is an EKU decoding problem. In this case the
# the tellicast client, pcscd and etokend services are stopped and restarted.
#
# Note that since the last line of the tellicast client log file may not be
# complete, the penultimate line is monitored.
#
#------------------------------------------------------------------------------

# the tellicast client log file...
TELLICAST_CLIENT_LOG_FILE=/var/log/recv.log
readonly TELLICAST_CLIENT_LOG_FILE

# the penultimate line...
PENULTIMATE_LINE=`tail -2 $TELLICAST_CLIENT_LOG_FILE | head -1`

# check the contents of the penultimate line...
if [ "`echo $PENULTIMATE_LINE | grep "Failed to decode key"`" != "" ]; then

   # the penultimate line contains "Failed to decode key" - there is an EKU decoding problem...

   # stop the tellicast client, pcscd and etokend services...
   /etc/init.d/tellicast-client stop
   /etc/init.d/pcscd stop
   /etc/init.d/etokend stop

   # start the etokend, pcscd and tellicast client services...
   /etc/init.d/etokend start
   /etc/init.d/pcscd start
   /etc/init.d/tellicast-client start

fi