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
60 struct 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
70 static void
login_utmpx(struct utmpx * utmpx,const char * username,const char * hostname,const char * tty,const struct timeval * now)71 login_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
95 static void
logout_utmpx(struct utmpx * utmpx,const struct timeval * now)96 logout_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
107 static void
login_utmp(struct utmp * utmp,const char * username,const char * hostname,const char * tty,const struct timeval * now)108 login_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
120 static void
logout_utmp(struct utmp * utmp,const struct timeval * now)121 logout_utmp(struct utmp *utmp, const struct timeval *now)
122 {
123 logout(utmp->ut_line);
124 }
125 #endif
126
127 struct window_utmp *
utmp_create(const char * tty)128 utmp_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
152 void
utmp_destroy(struct window_utmp * wu)153 utmp_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