Function mysql_create_user

sql/sql_acl.cc:11218–11378

*/

bool mysql_create_user(THD *thd, List <LEX_USER> &list, bool handle_as_role)
{
  int result;
  String wrong_users;
  LEX_USER *user_name;
  List_iterator <LEX_USER> user_list(list);
  bool binlog= false;
  bool some_users_dropped= false;
  DBUG_ENTER("mysql_create_user");
  DBUG_PRINT("entry", ("Handle as %s", handle_as_role ? "role" : "user"));

  if (handle_as_role && sp_process_definer(thd))
    DBUG_RETURN(TRUE);

  /* CREATE USER may be skipped on replication client. */
  Grant_tables tables;
  const uint tables_to_open= Table_user | Table_db | Table_tables_priv |
                             Table_columns_priv | Table_procs_priv |
                             Table_proxies_priv | Table_roles_mapping;
  if ((result= tables.open_and_lock(thd, tables_to_open, TL_WRITE)))
    DBUG_RETURN(result != 1);

  mysql_rwlock_wrlock(&LOCK_grant);
  mysql_mutex_lock(&acl_cache->lock);

  while ((user_name= user_list++))
  {
    if (user_name->user.str == current_user.str)
    {
      append_str(&wrong_users, STRING_WITH_LEN("CURRENT_USER"));
      result= TRUE;
      continue;
    }

    if (user_name->user.str == current_role.str)
    {
      append_str(&wrong_users, STRING_WITH_LEN("CURRENT_ROLE"));
      result= TRUE;
      continue;
    }

    if (handle_as_role &&
        (check_role_name(&user_name->user, false) == ROLE_NAME_INVALID))
    {
      append_user(thd, &wrong_users, user_name);
      result= TRUE;
      continue;
    }

    if (!user_name->host.str)
      user_name->host= host_not_specified;

    /*
      Search all in-memory structures and grant tables
      for a mention of the new user/role name.
    */
    if (handle_grant_data(thd, tables, 0, user_name, NULL))
    {