xref: /freebsd/lib/libulog/utempter.c (revision 580744621f33383027108364dcadad718df46ffe)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
5  * 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  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include "ulog.h"
33 #include "utempter.h"
34 
35 static int last_fd = -1;
36 
37 int
38 utempter_add_record(int fd, const char *host)
39 {
40 
41 	ulog_login_pseudo(fd, host);
42 	last_fd = fd;
43 	return (0);
44 }
45 
46 int
47 utempter_remove_added_record(void)
48 {
49 
50 	if (last_fd < 0)
51 		return (0);
52 	ulog_logout_pseudo(last_fd);
53 	last_fd = -1;
54 	return (0);
55 }
56 
57 int
58 utempter_remove_record(int fd)
59 {
60 
61 	ulog_logout_pseudo(fd);
62 	if (last_fd == fd)
63 		last_fd = -1;
64 	return (0);
65 }
66 
67 void
68 addToUtmp(const char *pty __unused, const char *host, int fd)
69 {
70 
71 	utempter_add_record(fd, host);
72 }
73 
74 void
75 removeFromUtmp(void)
76 {
77 
78 	utempter_remove_added_record();
79 }
80 
81 void
82 removeLineFromUtmp(const char *pty __unused, int fd)
83 {
84 
85 	utempter_remove_record(fd);
86 }
87