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>
49 static void output(struct passwd *, struct lastlog *);
50 static void outputx(struct passwd *, struct lastlogx *);
51 static void usage(void);
54 main(int argc, char **argv)
59 struct passwd *passwd;
61 struct lastlogx lastx;
63 while ((ch = getopt(argc, argv, "")) != -1) {
67 if ((fp = fopen(_PATH_LASTLOG, "r")) == NULL)
68 err(1, "%s", _PATH_LASTLOG);
70 setpassent(1); /* Keep passwd file pointers open */
72 /* Process usernames given on the command line. */
74 for (i = 1; i < argc; ++i) {
75 if ((passwd = getpwnam(argv[i])) == NULL) {
76 warnx("user '%s' not found", argv[i]);
79 if ((getlastlogx(_PATH_LASTLOGX, passwd->pw_uid,
81 outputx(passwd, &lastx);
84 /* Calculate the offset into the lastlog file. */
85 offset = (long)(passwd->pw_uid * sizeof(last));
86 if (fseek(fp, offset, SEEK_SET)) {
90 if (fread(&last, sizeof(last), 1, fp) != 1) {
91 warnx("fread error on '%s'", passwd->pw_name);
95 output(passwd, &last);
98 /* Read all lastlog entries, looking for active ones */
100 while ((passwd = getpwent()) != NULL) {
101 if ((getlastlogx(_PATH_LASTLOGX, passwd->pw_uid,
103 if (lastx.ll_tv.tv_sec == 0)
105 outputx(passwd, &lastx);
107 offset = (long)(passwd->pw_uid * sizeof(last));
109 if (fseek(fp, offset, SEEK_SET)) {
112 if (fread(&last, sizeof(last), 1, fp) != 1) {
115 if (last.ll_time == 0)
117 output(passwd, &last);
121 for (i = 0; fread(&last, sizeof(last), 1, fp) == 1; i++) {
122 if (last.ll_time == 0)
124 if ((passwd = getpwuid((uid_t)i)) != NULL)
125 output(passwd, &last);
128 warnx("fread error");
133 setpassent(0); /* Close passwd file pointers */
139 /* Duplicate the output of last(1) */
141 output(struct passwd *p, struct lastlog *l)
143 printf("%-*.*s %-*.*s %-*.*s %s",
144 UT_NAMESIZE, UT_NAMESIZE, p->pw_name,
145 UT_LINESIZE+4, UT_LINESIZE+4, l->ll_line,
146 UT_HOSTSIZE, UT_HOSTSIZE, l->ll_host,
147 (l->ll_time) ? ctime(&(l->ll_time)) : "Never logged in\n");
151 outputx(struct passwd *p, struct lastlogx *l)
153 printf("%-*.*s %-*.*s %-*.*s %s",
154 UT_NAMESIZE, UT_NAMESIZE, p->pw_name,
155 UT_LINESIZE+4, UT_LINESIZE+4, l->ll_line,
156 UT_HOSTSIZE, UT_HOSTSIZE, l->ll_host,
157 (l->ll_tv.tv_sec) ? ctime((&l->ll_tv.tv_sec)) : "Never logged in\n");
163 fprintf(stderr, "usage: lastlogin [user ...]\n");