2 /* $NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $ */
4 * Copyright (c) 1996 John M. Vinopal
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the NetBSD Project
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
38 __RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $");
41 #include <sys/types.h>
51 extern char *__progname;
52 static const char *logfile = _PATH_LASTLOG;
54 int main __P((int, char **));
55 static void output __P((struct passwd *, struct lastlog *));
56 static void usage __P((void));
65 struct passwd *passwd;
68 while ((ch = getopt(argc, argv, "")) != -1) {
72 fp = fopen(logfile, "r");
74 err(1, "%s", logfile);
76 setpassent(1); /* Keep passwd file pointers open */
78 /* Process usernames given on the command line. */
81 for (i = 1; i < argc; ++i) {
82 if ((passwd = getpwnam(argv[i])) == NULL) {
83 warnx("user '%s' not found", argv[i]);
86 /* Calculate the offset into the lastlog file. */
87 offset = (long)(passwd->pw_uid * sizeof(last));
88 if (fseek(fp, offset, SEEK_SET)) {
92 if (fread(&last, sizeof(last), 1, fp) != 1) {
93 warnx("fread error on '%s'", passwd->pw_name);
97 output(passwd, &last);
100 /* Read all lastlog entries, looking for active ones */
102 for (i = 0; fread(&last, sizeof(last), 1, fp) == 1; i++) {
103 if (last.ll_time == 0)
105 if ((passwd = getpwuid((uid_t)i)) != NULL)
106 output(passwd, &last);
109 warnx("fread error");
112 setpassent(0); /* Close passwd file pointers */
118 /* Duplicate the output of last(1) */
124 printf("%-*.*s %-*.*s %-*.*s %s",
125 UT_NAMESIZE, UT_NAMESIZE, p->pw_name,
126 UT_LINESIZE, UT_LINESIZE, l->ll_line,
127 UT_HOSTSIZE, UT_HOSTSIZE, l->ll_host,
128 (l->ll_time) ? ctime(&(l->ll_time)) : "Never logged in\n");
134 fprintf(stderr, "usage: %s [user ...]\n", __progname);