KTROP_CLEAR
case KTROP_CLEAR:
if (KTROP(SCARG(uap, ops)) != KTROP_CLEAR) {
if (KTROP(SCARG(uap, ops)) != KTROP_CLEAR)
ops = KTROP_CLEAR | KTRFLAG_DESCEND;
ops |= pid ? KTROP_CLEAR : KTROP_CLEARFILE;