2 * Copyright (c) 1996 John M. Vinopal
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed for the NetBSD Project
17 * 4. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $
33 * $FreeBSD: src/usr.sbin/lastlogin/lastlogin.c,v 1.2.2.2 2001/07/19 05:02:46 kris Exp $
34 * $DragonFly: src/usr.sbin/lastlogin/lastlogin.c,v 1.5 2004/11/13 16:14:33 liamfoy Exp $
37 #include <sys/cdefs.h>
47 static void output(struct passwd *, struct lastlog *);
48 static void usage(void);
51 main(int argc, char **argv)
55 struct passwd *passwd;
58 while ((ch = getopt(argc, argv, "")) != -1) {
62 if ((fp = fopen(_PATH_LASTLOG, "r")) == NULL)
63 err(1, "%s", _PATH_LASTLOG);
65 setpassent(1); /* Keep passwd file pointers open */
67 /* Process usernames given on the command line. */
70 for (i = 1; i < argc; ++i) {
71 if ((passwd = getpwnam(argv[i])) == NULL) {
72 warnx("user '%s' not found", argv[i]);
75 /* Calculate the offset into the lastlog file. */
76 offset = (long)(passwd->pw_uid * sizeof(last));
77 if (fseek(fp, offset, SEEK_SET)) {
81 if (fread(&last, sizeof(last), 1, fp) != 1) {
82 warnx("fread error on '%s'", passwd->pw_name);
86 output(passwd, &last);
89 /* Read all lastlog entries, looking for active ones */
91 for (i = 0; fread(&last, sizeof(last), 1, fp) == 1; i++) {
92 if (last.ll_time == 0)
94 if ((passwd = getpwuid((uid_t)i)) != NULL)
95 output(passwd, &last);
101 setpassent(0); /* Close passwd file pointers */
107 /* Duplicate the output of last(1) */
109 output(struct passwd *p, struct lastlog *l)
111 printf("%-*.*s %-*.*s %-*.*s %s",
112 UT_NAMESIZE, UT_NAMESIZE, p->pw_name,
113 UT_LINESIZE, UT_LINESIZE, l->ll_line,
114 UT_HOSTSIZE, UT_HOSTSIZE, l->ll_host,
115 (l->ll_time) ? ctime(&(l->ll_time)) : "Never logged in\n");
121 fprintf(stderr, "usage: lastlogin [user ...]\n");