cred2ucred
res = cred2ucred(dup->du_cred, p0.p_pid, NULL, CRED());
res = cred2ucred(caller->t_cred, p->p_pid, NULL, CRED());
(void) cred2ucred(ira->ira_cred, ira->ira_cpid, &toh[1], rcr);
(void) cred2ucred(cr, cpid, (void *)(opt + 1), pcr);
(void) cred2ucred(cr, cpid, (void *)(topt + 1), pcr);
uc = cred2ucred(cr, p->p_pid, NULL, CRED());
extern struct ucred_s *cred2ucred(const cred_t *, pid_t, void *,
uc = cred2ucred(kpc.pc_cr, kpc.pc_cpid, NULL, CRED());
uc = cred2ucred(pcr, pid, NULL, CRED());