realhostname_sa
int realhostname_sa(char *host, size_t hsize, struct sockaddr *addr,
realhostname_sa(remotehost, sizeof(remotehost) - 1, who, who->sa_len);
realhostname_sa(ut.ut_host, sizeof(ut.ut_host),
if (realhostname_sa(remote_hostname, sizeof(remote_hostname) - 1,