if (!mkdir($cache_auto_school_dir_name, 0755, TRUE))

		error_log('Unable to create needed directory: `' . $cache_auto_dir_name . '\'');

	    }

	  $semesters = array();

	  $semester_weights = 0;

	  /*

	   * Try to presort the semesters into the proper order based

	   * on time_start/time_end. We want the older semesters to be

	   * nearer to the end of the list. This way, the crawler

	   * doesn't have to decide how to sort the semesters itself:

	   */

	  foreach ($school['crawled_semesters'] as $semester)

	    {

	      $semesters[$semester->id()] = array(

						  'id' => $semester->id(),

						  'time_start' => $semester->time_start_get(),

						  'time_end' => $semester->time_end_get(),

						  'weight' => $semester_weights ++,

						  'name' => $semester->name_get(),

						  );

	      $cache_auto_school_semester_dir_name = $cache_auto_school_dir_name . $semester->id() . DIRECTORY_SEPARATOR;

      fprintf(STDERR, "Unable to open `%s' for writing\n",

	      $cache_file_name);

      return 1;

    }

  fwrite($cache_file, serialize($cache));

  fclose($cache_file);

  return 0;

}

/**

 * \brief

 *   Invoke a school's registration data crawler.

 *

 * Each school may export registration data on publically accessible

 * websites. Thus, we populate some autocomplete information by

 * crawling these pages and storing the information in a special set

 * of caches.

 *

 * Because crawling code can be non-trivial, it should be separated

 * from a school's main .inc file. Thus, if a school supports

 * crawling, it will have a file called

 * schools.d/<school_id>.crawl.inc. In this file, a function called

 * <school_id>_crawl(array &$semesters, $verbosity = 1) must be