IODUP
case IODUP:
iotype == IODUP ? "dup"
if (iotype != IODUP)
if (iotype != IODUP)
iop->flag = IODUP | (c == '<' ? IORDUP : 0);
: (type == IODUP && (iop->unit == !(flag & IORDUP))) ?
case IODUP: