RTBACKQ
rtpp->rt_flags |= RTBACKQ;
rtpp->rt_flags &= ~RTBACKQ;
rtpp->rt_flags &= ~RTBACKQ;
rtpp->rt_flags |= RTBACKQ;
rtpp->rt_flags |= RTBACKQ;
crtpp->rt_flags = prtpp->rt_flags & ~RTBACKQ;
if ((rtpp->rt_flags & RTBACKQ) != 0) {
rtpp->rt_flags &= ~RTBACKQ;
rtpp->rt_flags &= ~RTBACKQ;