Function reload_acl_and_cache

sql/sql_reload.cc:64–487

*/

bool reload_acl_and_cache(THD *thd, unsigned long long options,
                          TABLE_LIST *tables, int *write_to_binlog)
{
  bool result=0;
  select_errors=0;				/* Write if more errors */
  int tmp_write_to_binlog= *write_to_binlog= 1;
#ifndef DBUG_OFF
  /*
    When invoked for handling a SIGHUP by rpl_shutdown_sighup.test, we need to
    force the signal handler to wait after REFRESH_TABLES, as that will check
    for a killed server, and we need to call hostname_cache_refresh after
    server cleanup has happened to trigger MDEV-30260.
  */
  int do_dbug_sleep= 0;
#endif

  DBUG_ASSERT(!thd || !thd->in_sub_stmt);

  if (options & REFRESH_GRANT)
  {
#ifndef NO_EMBEDDED_ACCESS_CHECKS
    THD *tmp_thd= 0;
    /*
      If reload_acl_and_cache() is called from SIGHUP handler we have to
      allocate temporary THD for execution of acl_reload()/grant_reload().
    */
    if (unlikely(!thd) && (thd= (tmp_thd= new THD(0))))
    {
      thd->store_globals();
      thd->set_query_inner((char*) STRING_WITH_LEN("intern:reload_acl"),
                           default_charset_info);
    }

    if (likely(thd))
    {
      bool reload_acl_failed= acl_reload(thd);
      bool reload_grants_failed= grant_reload(thd);
      bool reload_servers_failed= servers_reload(thd);

      if (reload_acl_failed || reload_grants_failed || reload_servers_failed)
      {
        result= 1;
        /*
          When an error is returned, my_message may have not been called and
          the client will hang waiting for a response.
        */
        my_error(ER_UNKNOWN_ERROR, MYF(0));
      }

#ifndef DBUG_OFF
      DBUG_EXECUTE_IF("hold_sighup_log_refresh", {
        DBUG_ASSERT(!debug_sync_set_action(
            thd, STRING_WITH_LEN("now SIGNAL in_reload_acl_and_cache "
                                 "WAIT_FOR refresh_logs")));
        do_dbug_sleep= 1;
      });
#endif
    }