mariadb/mysql-test/include/have_unix_socket.inc

--source include/not_embedded.inc

if (!$AUTH_SOCKET_SO) {
  skip No unix_socket plugin;
}

if (!$USER) {
  skip USER variable is undefined;
}

if (`SELECT count(*) <> 0 FROM mysql.user WHERE user = '$USER'`) {
  skip \$USER=$USER which exists in mysql.user;
}