#!/bin/ash
export PATH=/sbin:/bin

#PXE boot?
if [ ! -d /bootbank ]; then
   exit 1
fi

first=0
if esxcfg-info -e; then
   if [ ! -f /bootbank/local.tgz ]; then
      first=1
   else
      mkdir -p /tmp/auto-backup.$$.dir
      cp /bootbank/local.tgz /tmp/auto-backup.$$.dir
   fi
else
   if [ ! -f /bootbank/state.tgz ]; then
      first=1
   else
      mkdir -p /tmp/auto-backup.$$.dir
      tar zxvf /bootbank/state.tgz -C /tmp/auto-backup.$$.dir
   fi
fi

if [ "$first" = "1" ]; then
   #always do the first one
   backup.sh 0
   if [ $? -ne 0 ]; then
      logger "Auto-Backup failed"
   fi
   exit 0
fi

tar zxvf /tmp/auto-backup.$$.dir/local.tgz -C /tmp/auto-backup.$$.dir
filestosave=`find /etc -follow -type f -name ".#*" | sed 's/\.#\(.*\)/\1/g'`

for filename in $filestosave
do
   diff -N $filename /tmp/auto-backup.$$.dir$filename
   if [ $? -ne 0 ]; then
      backup.sh 0
      if [ $? -ne 0 ]; then
         logger "Auto-Backup failed"
      fi
      break
   fi
done

#clean up
rm -rf /tmp/auto-backup.$$.dir