CRTS_IFLOW
#ifdef CRTS_IFLOW
{"crts_iflow", CRTS_IFLOW, MD_CTL},
tp->t_cflag |= CCTS_OFLOW | CRTS_IFLOW;
if (cflag & CRTS_IFLOW) {
r |= ((l & 0x80000000) ? (CRTS_IFLOW|CCTS_OFLOW) : 0);
r |= ((l & (CRTS_IFLOW|CCTS_OFLOW)) ? 0x80000000 : 0);
r |= ((l & 0x80000000) ? (CRTS_IFLOW|CCTS_OFLOW) : 0);
r |= ((l & (CRTS_IFLOW|CCTS_OFLOW)) ? 0x80000000 : 0);
r |= ((l & 0x80000000) ? (CRTS_IFLOW|CCTS_OFLOW) : 0);
r |= ((l & (CRTS_IFLOW|CCTS_OFLOW)) ? 0x80000000 : 0);