svc_get_local_cred
if (!svc_get_local_cred(trans, &cred)) {
extern bool_t svc_get_local_cred();
if (!svc_get_local_cred(transp, &cred)) {
if (!svc_get_local_cred(transp, &cred)) {
extern bool_t svc_get_local_cred(SVCXPRT *, svc_local_cred_t *);
extern bool_t svc_get_local_cred();