print "Archiving backup to '" + archive_path + "'..."
  if archive_type == 'gz' or archive_type == 'bz2':
    try:
      import tarfile
      tar = tarfile.open(archive_path, 'w:' + archive_type)
      tar.add(backup_subdir, os.path.basename(backup_subdir))
      tar.close()
    except ImportError, e:
      err_msg = "Import failed: " + str(e)
      err_code = -2
    except tarfile.TarError, e:
      err_msg = "Tar failed: " + str(e)
      err_code = -3