#!/bin/bash
#
#Download onePK - all-in-one-vm ova VM from Cisco:
#https://developer.cisco.com/site/networking/one/onepk/downloads/all-in-one-vm/
#
#Requirements:
#+21GB free disk space to convert vmdk to raw image
#Root password to mount raw image


function read_names
{
 echo ""
 while [[ ! -f "$path" ]]; do
  echo -n "Enter path to the onepk file: "
  read path
 done
 ova=$(basename $path)
 if [ -z "$ova" ]; then
  echo "File '$path' isn't matching standard name, exiting now"
  exit
 fi 
 dir=$(dirname $path)
 vmdk=$(echo $ova | grep -o  'all.*[0-9]')-disk1.vmdk
 raw=$(echo $ova | grep -o  'all.*[0-9]')-disk1.img
 name=$(echo $ova | grep -o  'all.*[0-9]');
}

function convert_to_raw
{
 echo -e "\nExtracting file '$ova' to '$dir'"
 tar xvf $path -C $dir
 vbox_manage=$(type -P vboxmanage)
 qemu_img=$(type -P qemu-img)
 if [[ ! -z "$vbox_manage" ]]; then
  echo -e "\nConverting file '$vmdk' to raw format with 'vboxmanage' utility"  
  $vbox_manage internalcommands converttoraw $dir/$vmdk $dir/$raw
 elif [[ ! -z "$qemu_img" ]]; then
  check_qemu_version
  echo -e "\nConverting file '$vmdk' to raw format with 'qemu-img' utility"
  $qemu_img convert -O raw $dir/$vmdk $dir/$raw
 else
   echo -e "\nNo utility found for conversion to raw format, exiting" 
   exit
 fi
}

function check_qemu_version
{
 qemu_ver=$($qemu_img info $dir/$vmdk 2>&1 | grep -o 'Wrong medium')
 if [[ "$qemu_ver" == "Wrong medium" ]]; then
  echo -e "\nYour qemu version doesn't support VMDK3 disk type, exiting"
  exit
 fi
} 

function get_offset
{
start=$(fdisk -l $dir/$raw | grep $dir/$raw\1 | awk '{print $3}')
offset=$(($start*512))
}


function mount_dir
{
 if [[ ! -d $dir/tmp ]]; then
  mkdir $dir/tmp
 fi
 echo -e "\nMounting parition '$raw' to '$dir/tmp', enter root password"
 su -c "mount -o loop,ro,offset=$offset $dir/$raw $dir/tmp"
 echo -e "\nExtracting 'vios-adventerprisek9-m.vmdk' from '$dir/tmp/usr/share/vmcloud/data/images/vios-adventerprisek9-m.ova'"
 tar xvf $dir/tmp/usr/share/vmcloud/data/images/vios-adventerprisek9-m.ova -C $dir 
 if [[ -f "$dir/vios-adventerprisek9-m.vmdk" ]]; then
   echo -e "\nFile 'vios-adventerprisek9-m.vmdk' was succesufully extracted to '$dir'"
   rm $dir/vios-adventerprisek9-m.mf $dir/vios-adventerprisek9-m.ovf $dir/README-BDEO.txt $dir/README-OVF.txt $dir/bdeo.sh
 fi
 echo -e "\nEnter root password to umount '$dir/tmp'"
 su -c "umount $dir/tmp"
 rm $dir/$raw 
 rm $dir/$vmdk $dir/$name.mf $dir/$name.ovf
 rmdir $dir/tmp 
} 
 

#BODY

read_names
convert_to_raw
get_offset
mount_dir