1/*	$NetBSD: utmp.c,v 1.1 2011/09/17 01:50:08 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38#include <sys/cdefs.h>
39__RCSID("$NetBSD: utmp.c,v 1.1 2011/09/17 01:50:08 christos Exp $");
40
41#include <sys/types.h>
42#include <sys/param.h>
43#include <syslog.h>
44#include <string.h>
45#include <time.h>
46#include <stdlib.h>
47#include <unistd.h>
48#include <util.h>
49#include <paths.h>
50
51#ifdef SUPPORT_UTMP
52#include <utmp.h>
53#endif
54#ifdef SUPPORT_UTMPX
55#include <utmpx.h>
56#endif
57
58#include "tmux.h"
59
60struct window_utmp {
61#ifdef SUPPORT_UTMP
62	struct utmp ut;
63#endif
64#ifdef SUPPORT_UTMPX
65	struct utmpx utx;
66#endif
67};
68
69#ifdef SUPPORT_UTMPX
70static void
71login_utmpx(struct utmpx *utmpx, const char *username, const char *hostname,
72	const char *tty, const struct timeval *now)
73{
74	const char *t;
75
76	(void)memset(utmpx, 0, sizeof(*utmpx));
77	utmpx->ut_tv = *now;
78	(void)strncpy(utmpx->ut_name, username, sizeof(utmpx->ut_name));
79	if (hostname)
80		(void)strncpy(utmpx->ut_host, hostname, sizeof(utmpx->ut_host));
81	(void)strncpy(utmpx->ut_line, tty, sizeof(utmpx->ut_line));
82	utmpx->ut_type = USER_PROCESS;
83	utmpx->ut_pid = getpid();
84	t = tty + strlen(tty);
85	if ((size_t)(t - tty) >= sizeof(utmpx->ut_id)) {
86	    (void)strncpy(utmpx->ut_id, t - sizeof(utmpx->ut_id),
87		sizeof(utmpx->ut_id));
88	} else {
89	    (void)strncpy(utmpx->ut_id, tty, sizeof(utmpx->ut_id));
90	}
91	(void)pututxline(utmpx);
92	endutxent();
93}
94
95static void
96logout_utmpx(struct utmpx *utmpx, const struct timeval *now)
97{
98	utmpx->ut_type = DEAD_PROCESS;
99	utmpx->ut_tv = *now;
100	utmpx->ut_pid = 0;
101	(void)pututxline(utmpx);
102	endutxent();
103}
104#endif
105
106#ifdef SUPPORT_UTMP
107static void
108login_utmp(struct utmp *utmp, const char *username, const char *hostname,
109    const char *tty, const struct timeval *now)
110{
111	(void)memset(utmp, 0, sizeof(*utmp));
112	utmp->ut_time = now->tv_sec;
113	(void)strncpy(utmp->ut_name, username, sizeof(utmp->ut_name));
114	if (hostname)
115		(void)strncpy(utmp->ut_host, hostname, sizeof(utmp->ut_host));
116	(void)strncpy(utmp->ut_line, tty, sizeof(utmp->ut_line));
117	login(utmp);
118}
119
120static void
121logout_utmp(struct utmp *utmp, const struct timeval *now)
122{
123	logout(utmp->ut_line);
124}
125#endif
126
127struct window_utmp *
128utmp_create(const char *tty)
129{
130	struct window_utmp *wu;
131	struct timeval tv;
132	char username[LOGIN_NAME_MAX];
133
134	if (getlogin_r(username, sizeof(username)) == -1)
135		return NULL;
136
137	if ((wu = malloc(sizeof(*wu))) == NULL)
138		return NULL;
139
140	tty += sizeof(_PATH_DEV) - 1;
141
142	(void)gettimeofday(&tv, NULL);
143#ifdef SUPPORT_UTMPX
144	login_utmpx(&wu->utx, username, "tmux", tty, &tv);
145#endif
146#ifdef SUPPORT_UTMP
147	login_utmp(&wu->ut, username, "tmux", tty, &tv);
148#endif
149	return wu;
150}
151
152void
153utmp_destroy(struct window_utmp *wu)
154{
155	struct timeval tv;
156
157	if (wu == NULL)
158		return;
159
160	(void)gettimeofday(&tv, NULL);
161#ifdef SUPPORT_UTMPX
162	logout_utmpx(&wu->utx, &tv);
163#endif
164#ifdef SUPPORT_UTMP
165	logout_utmp(&wu->ut, &tv);
166#endif
167}
168