#!/bin/bash
# Copyright (C) 2011 Citrix Systems, Inc.  All rights reserved
#     
# This software is licensed under the GNU General Public License v3 or later.
# 
# It 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, either version 3 of the License, or any later version.
# 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/>.
# 
# Version @VERSION@
#set -x
 
usage() {
  printf "Usage: %s [uuid of this host] [interval in seconds]\n" $(basename $0) >&2

}

if [ -z $1 ]; then
  usage
  exit 2
fi

if [ -z $2 ]; then
  usage
  exit 3
fi


date=`date +%s`
hbs=`lvscan | grep hb-$1 | awk '{print $2}'`
for hb in $hbs
do
  hb=${hb:1:`expr ${#hb} - 2`}
  active=`lvscan | grep $hb | awk '{print $1}'`
  if [ "$active" == "inactive" ]; then
    lvchange -ay $hb
    if [ ! -L $hb ]; then
      continue;
    fi
  fi
  ping=`dd if=$hb bs=1 count=100`
  if [ $? -ne 0 ]; then
    continue;
  fi
  diff=`expr $date - $ping`
  if [ $diff -lt $2 ]; then
    echo "=====> ALIVE <====="
    exit 0;    
  fi
done

hbs=`ls -l /var/run/sr-mount/*/hb-$1 | awk '{print $9}'`
for hb in $hbs
do
  ping=`cat $hb`
  if [ $? -ne 0 ]; then
    continue;
  fi
  diff=`expr $date - $ping`
  if [ $diff -lt $2 ]; then
    echo "=====> ALIVE <====="
    exit 0;    
  fi
done

echo "=====> DEAD <======"