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
33 #include <sys/cdefs.h>
36 __RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $");
47 static const char *logfile = _PATH_LASTLOG;
49 int main __P((int, char **));
50 static void output __P((struct passwd *, struct lastlog *));
51 static void usage __P((void));
60 struct passwd *passwd;
63 while ((ch = getopt(argc, argv, "")) != -1) {
67 fp = fopen(logfile, "r");
69 err(1, "%s", logfile);
71 setpassent(1); /* Keep passwd file pointers open */
73 /* Process usernames given on the command line. */
76 for (i = 1; i < argc; ++i) {
77 if ((passwd = getpwnam(argv[i])) == NULL) {
78 warnx("user '%s' not found", argv[i]);
81 /* Calculate the offset into the lastlog file. */
82 offset = (long)(passwd->pw_uid * sizeof(last));
83 if (fseek(fp, offset, SEEK_SET)) {
87 if (fread(&last, sizeof(last), 1, fp) != 1) {
88 warnx("fread error on '%s'", passwd->pw_name);
92 output(passwd, &last);
95 /* Read all lastlog entries, looking for active ones */
97 for (i = 0; fread(&last, sizeof(last), 1, fp) == 1; i++) {
98 if (last.ll_time == 0)
100 if ((passwd = getpwuid((uid_t)i)) != NULL)
101 output(passwd, &last);
104 warnx("fread error");
107 setpassent(0); /* Close passwd file pointers */
113 /* Duplicate the output of last(1) */
119 printf("%-*.*s %-*.*s %-*.*s %s",
120 UT_NAMESIZE, UT_NAMESIZE, p->pw_name,
121 UT_LINESIZE, UT_LINESIZE, l->ll_line,
122 UT_HOSTSIZE, UT_HOSTSIZE, l->ll_host,
123 (l->ll_time) ? ctime(&(l->ll_time)) : "Never logged in\n");
129 fprintf(stderr, "usage: lastlogin [user ...]\n");