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 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 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 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 121 logout_utmp(struct utmp *utmp, const struct timeval *now) 122 { 123 logout(utmp->ut_line); 124 } 125 #endif 126 127 struct window_utmp * 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 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