acpi_aml_set_fd
maxfd = acpi_aml_set_fd(STDIN_FILENO, maxfd, &rfds);
maxfd = acpi_aml_set_fd(fd, maxfd, &wfds);
maxfd = acpi_aml_set_fd(fd, maxfd, &rfds);
maxfd = acpi_aml_set_fd(STDOUT_FILENO, maxfd, &wfds);
maxfd = acpi_aml_set_fd(fd, maxfd, &rfds);