/*
 * Copyright (c) 1996 John M. Vinopal
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed for the NetBSD Project
 *      by John M. Vinopal.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $
 * $FreeBSD: src/usr.sbin/lastlogin/lastlogin.c,v 1.2.2.2 2001/07/19 05:02:46 kris Exp $
 */

#include <err.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <utmpx.h>
#include <unistd.h>

static  void    outputx(struct passwd *, struct lastlogx *);
static  void    usage(void);

int
main(int argc, char **argv)
{
        int     ch, i;
        struct passwd   *passwd;
        struct lastlogx lastx;

        while ((ch = getopt(argc, argv, "")) != -1) {
                usage();
        }

        setpassent(1);  /* Keep passwd file pointers open */

        /* Process usernames given on the command line. */
        if (argc > 1) {
                for (i = 1; i < argc; ++i) {
                        if ((passwd = getpwnam(argv[i])) == NULL) {
                                warnx("user '%s' not found", argv[i]);
                                continue;
                        }
                        if ((getlastlogx(_PATH_LASTLOGX, passwd->pw_uid,
                            &lastx)) != NULL) {
                                outputx(passwd, &lastx);
                                goto done;
                        }
                }
        }
        /* Read all lastlogx entries, looking for active ones */
        else {
                while ((passwd = getpwent()) != NULL) {
                        if ((getlastlogx(_PATH_LASTLOGX, passwd->pw_uid,
                            &lastx)) != NULL) {
                                if (lastx.ll_tv.tv_sec == 0)
                                        continue;
                                outputx(passwd, &lastx);
                        }
                }
        }

done:
        setpassent(0);  /* Close passwd file pointers */

        exit(0);
}

static void
outputx(struct passwd *p, struct lastlogx *l)
{
        printf("%-10s  %-8s %-22.22s   %s",
                p->pw_name, l->ll_line, l->ll_host,
                (l->ll_tv.tv_sec) ? ctime((&l->ll_tv.tv_sec)) : "Never logged in\n");
}

static void
usage(void)
{
        fprintf(stderr, "usage: lastlogin [user ...]\n");
        exit(1);
}