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