1 /** $MirOS: src/lib/libutil/logout.c,v 1.3 2005/10/21 11:02:57 tg Exp $ */
2 /* $OpenBSD: logout.c,v 1.7 2004/05/28 07:03:47 deraadt Exp $ */
3 /*
4 * Copyright (c) 1988, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/types.h>
33 #include <sys/time.h>
34
35 #include <fcntl.h>
36 #include <utmp.h>
37 #include <unistd.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "util.h"
42
43 __SCCSID("@(#)logout.c 8.1 (Berkeley) 6/4/93");
44 __RCSID("$MirOS: src/lib/libutil/logout.c,v 1.3 2005/10/21 11:02:57 tg Exp $");
45
46 typedef struct utmp UTMP;
47
48 int
logout(const char * line)49 logout(const char *line)
50 {
51 int fd, rval;
52 UTMP ut;
53
54 if ((fd = open(_PATH_UTMP, O_RDWR, 0)) < 0)
55 return(0);
56 rval = 0;
57 while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) {
58 if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE))
59 continue;
60 memset(ut.ut_name, 0, UT_NAMESIZE);
61 memset(ut.ut_host, 0, UT_HOSTSIZE);
62 (void)time(&ut.ut_time);
63 (void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR);
64 (void)write(fd, &ut, sizeof(UTMP));
65 rval = 1;
66 }
67 (void)close(fd);
68 return(rval);
69 }
70