pn_getsymlink
if ((error = pn_getsymlink(cvp, &linkpath, cr)) != 0) {
if (error = pn_getsymlink(cvp, &linkpath, kcred)) {
if (error = pn_getsymlink(cvp, &linkpath, cr)) {
err = pn_getsymlink(vp, &link_pn, cred);
extern int pn_getsymlink(vnode_t *, struct pathname *, cred_t *);