delay_us         1154 lib/tty/key.c  getch_with_timeout (unsigned int delay_us)
delay_us         1160 lib/tty/key.c      time_out.tv_sec = delay_us / G_USEC_PER_SEC;
delay_us         1161 lib/tty/key.c      time_out.tv_usec = delay_us % G_USEC_PER_SEC;