2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)logout.c 8.1 (Berkeley) 6/4/93
30 * $FreeBSD: src/lib/libutil/logout.c,v 1.6.2.2 2000/09/20 09:54:16 jkh Exp $
33 #include <sys/types.h>
43 typedef struct utmp UTMP
;
46 logout(const char *line
)
52 if ((fd
= open(_PATH_UTMP
, O_RDWR
, 0)) < 0)
55 while (read(fd
, &ut
, sizeof(UTMP
)) == sizeof(UTMP
)) {
56 if (!ut
.ut_name
[0] || strncmp(ut
.ut_line
, line
, UT_LINESIZE
))
58 bzero(ut
.ut_name
, UT_NAMESIZE
);
59 bzero(ut
.ut_host
, UT_HOSTSIZE
);
60 (void)time(&ut
.ut_time
);
61 (void)lseek(fd
, -(off_t
)sizeof(UTMP
), L_INCR
);
62 (void)write(fd
, &ut
, sizeof(UTMP
));