C function to read a bson encoded file

nasfs.c

static int nas_initalize(const char *path)
{
  int error = 0;
  bson_reader_t *reader = bson_reader_new_from_file(path, &bson_error);
  if (!reader) {
    fprintf (stderr, "ERROR: %d.%d: %s\n",
             bson_error.domain, bson_error.code, bson_error.message);
  }
  super_block = bson_reader_read(reader, NULL);
  bson_iter_init(&iter, super_block);

  if (bson_iter_find(&iter, "max_dir"))
    {
      max_dir = bson_iter_int32(&iter);
    }
  else
    {
      error = -1;
      bson_reader_destroy(reader);
    }

  if (bson_iter_find(&iter, "raid_lv"))
    {
      raid_lv = bson_iter_int32(&iter);
    }
  else
    {
      error = -1;
      bson_reader_destroy(reader);
    }

  if(bson_iter_find(&iter, "vol"))
    {
      int count = 0;
      bson_iter_recurse(&iter, sub_iter);
      while(bson_iter_next(sub_iter) == true)
        {
          if (bson_iter_find_descendant(&iter, "vol.0", sub_iter))
            {
              vol[count++] = bson_iter_utf8 (sub_iter, NULL);
            }
        }
    }
  else
    {
      error = -1;
      bson_reader_destroy(reader);
    }

  bson_reader_destroy(reader);

  return error;
}