MTF_OPEN
if ((sc->sc_flags & MTF_OPEN) != 0)
sc->sc_flags |= MTF_OPEN;
sc->sc_flags &= ~MTF_OPEN;
sc->sc_flags &= ~MTF_OPEN;
sc->sc_flags &= MTF_EXISTS | MTF_OPEN | MTF_REW;
sc->sc_flags &= MTF_OPEN | MTF_EXISTS;
if (sc->sc_flags & MTF_OPEN)
sc->sc_flags |= MTF_OPEN;
sc->sc_flags &= ~MTF_OPEN;
sc->sc_flags &= ~MTF_OPEN;
sc->sc_flags &= MTF_EXISTS | MTF_OPEN | MTF_REW;
sc->sc_flags &= MTF_OPEN | MTF_EXISTS;