LO_LOOPING
if ((vtol(dvp))->lo_looping & LO_LOOPING) {
(vtol(*vpp))->lo_looping |= LO_LOOPING;
(vtol(*vpp))->lo_looping |= LO_LOOPING;
if (!((vtol(dvp))->lo_looping & LO_LOOPING)) {
(((vtol(dvp))->lo_looping & LO_LOOPING) && !doingdotdot)) {
(vtol(*vpp))->lo_looping |= LO_LOOPING;