# $1: The new package version
post_install() {
  # Unload modules (if any)
  for _mod in vbox{drv,netadp,netflt}; do
    modprobe -r $_mod &> /dev/null
  done

  # Build new module
  /etc/rc.d/vboxdrv setup

  # Add vboxusers group, GID 108 is reserved (http://wiki.archlinux.org/index.php/UID_and_GID_list),
  # but in some systems it may be being used - please replace if needed.
  groupadd -f -g 108 vboxusers

  # Create the directory below if it doesn't exist
  mkdir -p "/var/run/VirtualBox"

  # Load new udev rule for module vboxdrv
  udevadm control --reload-rules

  # Show the license
  echo >&2
  echo '==> You must agree to the following license in order to use this program:' >&2
  echo '------------------------------------------------------------------------' >&2
  echo >&2
  cat "/opt/VirtualBox/LICENSE" >&2
  echo >&2
  echo '------------------------------------------------------------------------' >&2

  /bin/cat <<EOF

==> Add your user to the vboxusers group:
==> # gpasswd -a USERNAME vboxusers
==>
==> You must load vboxdrv module before starting VirtualBox:
==> # modprobe vboxdrv
==>
==> You must load vboxnetflt for Host Interface Networking:
==> # modprobe vboxnetflt
==>
==> You must load vboxnetadp for Host-Only networking:
==> # modprobe vboxnetadp
==>
==> To load it automatically, add vboxdrv module to the "MODULES" array
==> "/etc/rc.conf".
==>
==> Run \`/etc/rc.d/vboxdrv setup\` as root every time your kernel is
==> upgraded, to compile the module for the new kernel version.
==>
==> If USB does not work for you out-of-the-box, add the following line
==> to "/etc/fstab":
==> "none /proc/bus/usb usbfs auto,busgid=108,busmode=0775,devgid=108,devmode=0664 0 0"

EOF
}

# $1: The new package version
# $2: The old package version
post_upgrade() {
  _NEWVERSION=`echo $1 | cut -f-1 -d '-'`
  _OLDVERSION=`echo $2 | cut -f-1 -d '-'`

  # Unload modules (if any)
  for _mod in vbox{drv,netadp,netflt}; do
    modprobe -r $_mod &> /dev/null
  done

  # Remove any stuff (e.g. module compilation files) from an old installation - old versions used
  # to use these directories.
  if [ "$_NEWVERSION" != "$_OLDVERSION" ]; then
    rm -Rf "/opt/VirtualBox-${_OLDVERSION}" &> /dev/null
  fi
  if [ "$1" != "$2" ]; then
    rm -Rf "/opt/virtualbox" &> /dev/null
  fi
  
  # Build new module
  /etc/rc.d/vboxdrv setup

  # Create the directory below if it doesn't exist
  mkdir -p "/var/run/VirtualBox"

  /bin/cat <<EOF

==> You must load vboxdrv module before starting VirtualBox:
==> # modprobe vboxdrv
==>
==> You must load vboxnetflt for Host Interface Networking:
==> # modprobe vboxnetflt
==>
==> You must load vboxnetadp for Host-Only networking:
==> # modprobe vboxnetadp
==>
==> To load it automatically, add vboxdrv module to the "MODULES" array
==> "/etc/rc.conf".
==>
==> Run \`/etc/rc.d/vboxdrv setup\` as root every time your kernel is
==> upgraded, to compile the module for the new kernel version.
==>
==> If USB does not work for you out-of-the-box, add the following line
==> to "/etc/fstab":
==> "none /proc/bus/usb usbfs auto,busgid=108,busmode=0775,devgid=108,devmode=0664 0 0"

EOF

  if [ "`vercmp $_OLDVERSION 3.2.2`" -lt 0 ]; then
    /bin/cat <<EOF
==> IMPORTANT: This package now uses \`/etc/rc.d/vboxdrv setup\` instead
==>            of the old "vbox_build_module" script.

EOF
  fi
}

# $1: The old package version
pre_remove() {
  # Unload modules (if any)
  for _mod in vbox{drv,netadp,netflt}; do
    modprobe -r $_mod &> /dev/null
  done

  # Remove the module files
  rm -f "/lib/modules/`uname -r`/misc/"{vboxdrv,vboxnetadp,vboxnetflt}.ko

  # Remove any stuff remaining from the module compilation
  rm -Rf "/opt/VirtualBox"
}