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 int main(int, char **);
48 static void output(struct utmpx *);
49 static void usage(void);
50 static int utcmp_user(const void *, const void *);
53 static const char *file = NULL;
54 static int (*utcmp)(const void *, const void *) = utcmp_user;
57 utcmp_user(const void *u1, const void *u2)
60 return (order * strcmp(((const struct utmpx *)u1)->ut_user,
61 ((const struct utmpx *)u2)->ut_user));
65 utcmp_time(const void *u1, const void *u2)
69 t1 = ((const struct utmpx *)u1)->ut_tv.tv_sec;
70 t2 = ((const struct utmpx *)u2)->ut_tv.tv_sec;
71 return (t1 < t2 ? order : t1 > t2 ? -order : 0);
75 main(int argc, char *argv[])
78 struct utmpx *u, *ulist;
80 while ((ch = getopt(argc, argv, "f:rt")) != -1) {
99 /* Process usernames given on the command line. */
100 for (i = 0; i < argc; i++) {
101 if (setutxdb(UTXDB_LASTLOGIN, file) != 0)
102 err(1, "failed to open lastlog database");
103 if ((u = getutxuser(argv[i])) == NULL) {
104 warnx("user '%s' not found", argv[i]);
111 /* Read all lastlog entries, looking for active ones. */
112 if (setutxdb(UTXDB_LASTLOGIN, file) != 0)
113 err(1, "failed to open lastlog database");
116 while ((u = getutxent()) != NULL) {
117 if (u->ut_type != USER_PROCESS)
119 if ((ulistsize % 16) == 0) {
120 ulist = realloc(ulist,
121 (ulistsize + 16) * sizeof(struct utmpx));
125 ulist[ulistsize++] = *u;
129 qsort(ulist, ulistsize, sizeof(struct utmpx), utcmp);
130 for (i = 0; i < ulistsize; i++)
137 /* Duplicate the output of last(1) */
139 output(struct utmpx *u)
141 time_t t = u->ut_tv.tv_sec;
143 printf("%-10s %-8s %-22.22s %s",
144 u->ut_user, u->ut_line, u->ut_host, ctime(&t));
150 fprintf(stderr, "usage: lastlogin [-f file] [-rt] [user ...]\n");