unp_connid
unp_connid(l, unp, UNP_EIDSBIND);
unp_connid(l, unp3, UNP_EIDSVALID);
memcpy(&unp->unp_connid, &unp2->unp_connid,
sizeof(unp->unp_connid));
unp->unp_connid.unp_pid = l->l_proc->p_pid;
unp->unp_connid.unp_euid = kauth_cred_geteuid(l->l_cred);
unp->unp_connid.unp_egid = kauth_cred_getegid(l->l_cred);
error = sockopt_set(sopt, &unp->unp_connid,
sizeof(unp->unp_connid));
struct unpcbid unp_connid; /* pid and eids of peer */