1/*-
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: src/lib/libutil/logout.c,v 1.11 2003/10/18 10:04:16 markm Exp $");
36
37#if defined(LIBC_SCCS) && !defined(lint)
38#if 0
39static char sccsid[] = "@(#)logout.c	8.1 (Berkeley) 6/4/93";
40#endif
41#endif /* LIBC_SCCS and not lint */
42
43#include <sys/types.h>
44#include <sys/time.h>
45
46#include <fcntl.h>
47#include <libutil.h>
48#include <stdlib.h>
49#include <string.h>
50#include <timeconv.h>
51#include <unistd.h>
52#include <utmp.h>
53
54typedef struct utmp UTMP;
55
56int
57logout(const char *line)
58{
59	int fd;
60	UTMP ut;
61	int rval;
62
63	if ((fd = open(_PATH_UTMP, O_RDWR, 0)) < 0)
64		return(0);
65	rval = 0;
66	while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) {
67		if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE))
68			continue;
69		bzero(ut.ut_name, UT_NAMESIZE);
70		bzero(ut.ut_host, UT_HOSTSIZE);
71		ut.ut_time = _time_to_time32(time(NULL));
72		(void)lseek(fd, -(off_t)sizeof(UTMP), L_INCR);
73		(void)write(fd, &ut, sizeof(UTMP));
74		rval = 1;
75	}
76	(void)close(fd);
77	return(rval);
78}
79