B_FLAG
if (pmtab->p_ttyflags & (C_FLAG|B_FLAG)) {
} else if ((pmtab->p_ttyflags & (B_FLAG)))
if (pmtab->p_ttyflags & B_FLAG) { /* port is bi-directional */
if (pmtab->p_ttyflags & (C_FLAG|B_FLAG)) {
} else if ((pmptr->p_ttyflags & (C_FLAG|B_FLAG)) &&
*ttyflags |= B_FLAG;
if (flags & B_FLAG) {
flags &= ~B_FLAG;
flags &= ~B_FLAG;
if (pmptr->p_ttyflags & (B_FLAG|C_FLAG))