tdirlookup
error = tdirlookup(dir, "..", &dotdot, cred);
error = tdirlookup(parent, nm, &tp, cred);
error = tdirlookup(parent, tnm, &found, cred);
error = tdirlookup(fromparent, onm, &fromtp, cred);
if (tdirlookup(toparent, nnm, &totp, cred) == 0) {
error = tdirlookup(parent, nm, &self, cred);
error = tdirlookup(parent, nm, &self, cred);
error = tdirlookup(parent, lnm, &self, cred);
error = tdirlookup(tp, nm, &ntp, cred);
error = tdirlookup(parent, nm, &oldtp, cred);
extern int tdirlookup(struct tmpnode *, char *, struct tmpnode **,