XML_Parser parser = XML_ParserCreate("UTF-8");
if (parser == NULL) {
  fprintf(stderr, "XML_ParserCreate failed\n");
  close(fd);
  exit(1);
}
// EntityDeclHandler needs a reference to the parser to stop
// parsing.
XML_SetUserData(parser, parser);
// Disable entity processing, to inhibit entity expansion.
XML_SetEntityDeclHandler(parser, EntityDeclHandler);