Function acl_getroot

sql/sql_acl.cc:3334–3406

*/

bool acl_getroot(Security_context *sctx,
                 const LEX_CSTRING &user, const LEX_CSTRING &host,
                 const LEX_CSTRING &ip, const LEX_CSTRING &db)
{
  int res= 1;
  ACL_USER *acl_user= 0;
  DBUG_ENTER("acl_getroot");

  DBUG_PRINT("enter", ("Host: '%s', Ip: '%s', User: '%s', db: '%s'",
                       host.str, ip.str, user.str, db.str));
  sctx->init();
  sctx->user= *user.str ? user.str : NULL;
  sctx->host= host.str;
  sctx->ip= ip.str;
  sctx->host_or_ip= host.str ? host.str : (safe_str(ip.str));

  if (!initialized)
  {
    /*
      here if mysqld's been started with --skip-grant-tables option.
    */
    sctx->skip_grants();
    DBUG_RETURN(FALSE);
  }

  mysql_mutex_lock(&acl_cache->lock);

  sctx->db_access= NO_ACL;

  if (host.str[0]) // User, not Role
  {
    acl_user= find_user_wild(host, user, ip);

    if (acl_user)
    {
      res= 0;
      if (ACL_DB *acl_db= acl_db_find(db.str, user.str, host.str, ip.str, FALSE))
        sctx->db_access= acl_db->access;

      sctx->master_access= acl_user->access;

      strmake_buf(sctx->priv_user, user.str);

      if (acl_user->host.hostname)
        strmake_buf(sctx->priv_host, acl_user->host.hostname);
    }
  }
  else // Role, not User
  {
    ACL_ROLE *acl_role= find_acl_role(user, false);
    if (acl_role)
    {
      res= 0;
      if (ACL_DB *acl_db= acl_db_find(db.str, user.str, "", "", FALSE))
        sctx->db_access = acl_db->access;

      sctx->master_access= acl_role->access;