CSTART
{ "start", VSTART, CSTART },
CDSWTCH, CERASE2, CSTART, CSTOP,
_POSIX_VDISABLE, CERASE2, CSTART, CSTOP,
#ifndef CSTART
[VSTART] = CSTART,
mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART);