#!/bin/sh
true <<'LICENSE'
  Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
  Copyright (C) 2019 Joe Ayers AE6XE
  See Contributors file for additional contributors

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation version 3 of the License.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

  Additional Terms:

  Additional use restrictions exist on the AREDN(TM) trademark and logo.
    See AREDNLicense.txt for more info.

  Attributions to the AREDN Project must be retained in the source code.
  If importing this code into a new or existing project attribution
  to the AREDN project must be added to the source code.

  You must not misrepresent the origin of the material contained within.

  Modified versions must be modified to attribute to the original source
  and be marked in reasonable ways as differentiate it from the original
  version.

LICENSE

pidfile="/var/run/olsrd.pid"
logfile="/tmp/olsrd.log"

olsrd_restart()
{
  uptime=$(cut -d' ' -f1 < /proc/uptime)
  date=$(date)
  echo "$uptime $date" >> $logfile
  /etc/init.d/olsrd restart

  # keep file size in check
  if [ $(wc -l $logfile | cut -d\  -f1 ) -gt 300 ] ; then
    cp  $logfile $logfile.tmp
    tail -275 $logfile.tmp > $logfile
    rm -f $logfile.tmp
  fi
} 
 
touch $logfile

while true
do

  sleep 21

  if [ -f $pidfile -a -d "/proc/$(cat $pidfile 2>/dev/null)" ] ; then
    if [ -f /tmp/olsrd.watchdog ] ; then
      rm -f /tmp/olsrd.watchdog
    else
      # olsrd is running, but not processing events
      olsrd_restart
    fi
  else
    olsr_pid=$(ps | grep /usr/sbin/olsrd | grep -v grep | sed -e "s/^ //" | cut -d\  -f1 )
    [ ! $olsr_pid ] && olsr_pid=0
    [ ! -f $pidfile -a $olsr_pid -gt 1 ]  &&  echo -n "$olsr_pid" > $pidfile
  fi

done