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/*
* Copyright (c) 1996 John M. Vinopal
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project
* by John M. Vinopal.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$FreeBSD$");
__RCSID("$NetBSD: lastlogin.c,v 1.4 1998/02/03 04:45:35 perry Exp $");
#endif
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <utmpx.h>
int main(int, char **);
static void output(struct utmpx *);
static void usage(void);
static int utcmp_user(const void *, const void *);
static int order = 1;
static const char *file = NULL;
static int (*utcmp)(const void *, const void *) = utcmp_user;
static int
utcmp_user(const void *u1, const void *u2)
{
return (order * strcmp(((const struct utmpx *)u1)->ut_user,
((const struct utmpx *)u2)->ut_user));
}
static int
utcmp_time(const void *u1, const void *u2)
{
time_t t1, t2;
t1 = ((const struct utmpx *)u1)->ut_tv.tv_sec;
t2 = ((const struct utmpx *)u2)->ut_tv.tv_sec;
return (t1 < t2 ? order : t1 > t2 ? -order : 0);
}
int
main(int argc, char *argv[])
{
int ch, i, ulistsize;
struct utmpx *u, *ulist;
while ((ch = getopt(argc, argv, "f:rt")) != -1) {
switch (ch) {
case 'f':
file = optarg;
break;
case 'r':
order = -1;
break;
case 't':
utcmp = utcmp_time;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc > 0) {
/* Process usernames given on the command line. */
for (i = 0; i < argc; i++) {
if (setutxdb(UTXDB_LASTLOGIN, file) != 0)
err(1, "failed to open lastlog database");
if ((u = getutxuser(argv[i])) == NULL) {
warnx("user '%s' not found", argv[i]);
continue;
}
output(u);
endutxent();
}
} else {
/* Read all lastlog entries, looking for active ones. */
if (setutxdb(UTXDB_LASTLOGIN, file) != 0)
err(1, "failed to open lastlog database");
ulist = NULL;
ulistsize = 0;
while ((u = getutxent()) != NULL) {
if (u->ut_type != USER_PROCESS)
continue;
if ((ulistsize % 16) == 0) {
ulist = realloc(ulist,
(ulistsize + 16) * sizeof(struct utmpx));
if (ulist == NULL)
err(1, "malloc");
}
ulist[ulistsize++] = *u;
}
endutxent();
qsort(ulist, ulistsize, sizeof(struct utmpx), utcmp);
for (i = 0; i < ulistsize; i++)
output(&ulist[i]);
}
exit(0);
}
/* Duplicate the output of last(1) */
static void
output(struct utmpx *u)
{
time_t t = u->ut_tv.tv_sec;
printf("%-10s %-8s %-22.22s %s",
u->ut_user, u->ut_line, u->ut_host, ctime(&t));
}
static void
usage(void)
{
fprintf(stderr, "usage: lastlogin [-f file] [-rt] [user ...]\n");
exit(1);
}
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