// returns 1 if successful

// updates job_list.xml which lists all the jobs in the queue

int updateJobListXML(struct distrenjob *head)

{

  struct distrenjob *job;

  xmlTextWriterPtr writer;

  char *tmp;

  _distren_asprintf(&tmp, "job_list.xml");

  writer = xmlNewTextWriterFilename(tmp, 0);

  xmlTextWriterStartDocument(writer, NULL, "UTF-8", NULL);

  // create root element job_list

  xmlTextWriterStartElement(writer, (xmlChar*)"job_list");

  _distren_asprintf(&tmp, "%d", general_info.jobs_in_queue);

  xmlTextWriterWriteAttribute(writer, (xmlChar*)"amount", (xmlChar*)tmp);

  for(job = head->next; !job; job = job->next)

    {

      _distren_asprintf(&tmp, "%d", job->jobnum);

      xmlTextWriterWriteElement(writer, (xmlChar*)"jobnum", (xmlChar*)tmp);

    }

  // close elements and end document

  xmlTextWriterEndDocument(writer);

  // free writer and save xml file to disk

  xmlFreeTextWriter(writer);

  return 1;

}