vtoname
if (vtoname(vp, fn, MAXNAMELEN) != 0) {
if ((error = vtoname(open_vp, file_name, MAXNAMELEN)) != 0) {
if ((ep->error = vtoname(vp, fn, MAXNAMELEN)) != 0) {
if ((ep->error = vtoname(vp, fn, MAXNAMELEN)) != 0) {
if ((error = vtoname(*vpp, fn, MAXNAMELEN)) != 0) {
extern int vtoname(vnode_t *, char *, ssize_t);