BGE_MBX_TX_HOST_PROD0_LO is write-only, avoid reading it.
[dragonfly/vkernel-mp.git] / lib / libutil / logout.c
blobbf32e331c89a48fcfb733aedc6c6636b8f2cb82b
1 /*-
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
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.
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.
33 * @(#)logout.c 8.1 (Berkeley) 6/4/93
34 * $FreeBSD: src/lib/libutil/logout.c,v 1.6.2.2 2000/09/20 09:54:16 jkh Exp $
35 * $DragonFly: src/lib/libutil/logout.c,v 1.4 2005/03/04 06:22:57 cpressey Exp $
38 #include <sys/types.h>
39 #include <sys/time.h>
41 #include <fcntl.h>
42 #include <utmp.h>
43 #include <unistd.h>
44 #include <stdlib.h>
45 #include <string.h>
47 #include "libutil.h"
49 typedef struct utmp UTMP;
51 int
52 logout(const char *line)
54 int fd;
55 UTMP ut;
56 int rval;
58 if ((fd = open(_PATH_UTMP, O_RDWR, 0)) < 0)
59 return(0);
60 rval = 0;
61 while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) {
62 if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE))
63 continue;
64 bzero(ut.ut_name, UT_NAMESIZE);
65 bzero(ut.ut_host, UT_HOSTSIZE);
66 (void)time(&ut.ut_time);
67 (void)lseek(fd, -(off_t)sizeof(UTMP), L_INCR);
68 (void)write(fd, &ut, sizeof(UTMP));
69 rval = 1;
71 (void)close(fd);
72 return(rval);