usr/src/include/lastlog.h

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)lastlog.h   5.1 (Berkeley) %G%
 */

struct lastlog {
        time_t  ll_time;
        char    ll_line[8];
        char    ll_host[16];            /* same as in utmp */
};