1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2010 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 "namespace.h" 33 #include <sys/endian.h> 34 #include <sys/param.h> 35 #include <sys/time.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <utmpx.h> 39 #include "utxdb.h" 40 #include "un-namespace.h" 41 42 #define UTOF_STRING(ut, fu, field) do { \ 43 strncpy((fu)->fu_ ## field, (ut)->ut_ ## field, \ 44 MIN(sizeof (fu)->fu_ ## field, sizeof (ut)->ut_ ## field)); \ 45 } while (0) 46 #define UTOF_ID(ut, fu) do { \ 47 memcpy((fu)->fu_id, (ut)->ut_id, \ 48 MIN(sizeof (fu)->fu_id, sizeof (ut)->ut_id)); \ 49 } while (0) 50 #define UTOF_PID(ut, fu) do { \ 51 (fu)->fu_pid = htobe32((ut)->ut_pid); \ 52 } while (0) 53 #define UTOF_TYPE(ut, fu) do { \ 54 (fu)->fu_type = (ut)->ut_type; \ 55 } while (0) 56 #define UTOF_TV(fu) do { \ 57 struct timeval tv; \ 58 gettimeofday(&tv, NULL); \ 59 (fu)->fu_tv = htobe64((uint64_t)tv.tv_sec * 1000000 + \ 60 (uint64_t)tv.tv_usec); \ 61 } while (0) 62 63 void 64 utx_to_futx(const struct utmpx *ut, struct futx *fu) 65 { 66 67 memset(fu, 0, sizeof *fu); 68 69 switch (ut->ut_type) { 70 case BOOT_TIME: 71 case OLD_TIME: 72 case NEW_TIME: 73 /* Extension: shutdown time. */ 74 case SHUTDOWN_TIME: 75 break; 76 case USER_PROCESS: 77 UTOF_ID(ut, fu); 78 UTOF_STRING(ut, fu, user); 79 UTOF_STRING(ut, fu, line); 80 /* Extension: host name. */ 81 UTOF_STRING(ut, fu, host); 82 UTOF_PID(ut, fu); 83 break; 84 case INIT_PROCESS: 85 UTOF_ID(ut, fu); 86 UTOF_PID(ut, fu); 87 break; 88 case LOGIN_PROCESS: 89 UTOF_ID(ut, fu); 90 UTOF_STRING(ut, fu, user); 91 UTOF_STRING(ut, fu, line); 92 UTOF_PID(ut, fu); 93 break; 94 case DEAD_PROCESS: 95 UTOF_ID(ut, fu); 96 UTOF_PID(ut, fu); 97 break; 98 default: 99 fu->fu_type = EMPTY; 100 return; 101 } 102 103 UTOF_TYPE(ut, fu); 104 UTOF_TV(fu); 105 } 106 107 #define FTOU_STRING(fu, ut, field) do { \ 108 strncpy((ut)->ut_ ## field, (fu)->fu_ ## field, \ 109 MIN(sizeof (ut)->ut_ ## field - 1, sizeof (fu)->fu_ ## field)); \ 110 } while (0) 111 #define FTOU_ID(fu, ut) do { \ 112 memcpy((ut)->ut_id, (fu)->fu_id, \ 113 MIN(sizeof (ut)->ut_id, sizeof (fu)->fu_id)); \ 114 } while (0) 115 #define FTOU_PID(fu, ut) do { \ 116 (ut)->ut_pid = be32toh((fu)->fu_pid); \ 117 } while (0) 118 #define FTOU_TYPE(fu, ut) do { \ 119 (ut)->ut_type = (fu)->fu_type; \ 120 } while (0) 121 #define FTOU_TV(fu, ut) do { \ 122 uint64_t t; \ 123 t = be64toh((fu)->fu_tv); \ 124 (ut)->ut_tv.tv_sec = t / 1000000; \ 125 (ut)->ut_tv.tv_usec = t % 1000000; \ 126 } while (0) 127 128 struct utmpx * 129 futx_to_utx(const struct futx *fu) 130 { 131 static _Thread_local struct utmpx *ut; 132 133 if (ut == NULL) { 134 ut = calloc(1, sizeof *ut); 135 if (ut == NULL) 136 return (NULL); 137 } else 138 memset(ut, 0, sizeof *ut); 139 140 switch (fu->fu_type) { 141 case BOOT_TIME: 142 case OLD_TIME: 143 case NEW_TIME: 144 /* Extension: shutdown time. */ 145 case SHUTDOWN_TIME: 146 break; 147 case USER_PROCESS: 148 FTOU_ID(fu, ut); 149 FTOU_STRING(fu, ut, user); 150 FTOU_STRING(fu, ut, line); 151 /* Extension: host name. */ 152 FTOU_STRING(fu, ut, host); 153 FTOU_PID(fu, ut); 154 break; 155 case INIT_PROCESS: 156 FTOU_ID(fu, ut); 157 FTOU_PID(fu, ut); 158 break; 159 case LOGIN_PROCESS: 160 FTOU_ID(fu, ut); 161 FTOU_STRING(fu, ut, user); 162 FTOU_STRING(fu, ut, line); 163 FTOU_PID(fu, ut); 164 break; 165 case DEAD_PROCESS: 166 FTOU_ID(fu, ut); 167 FTOU_PID(fu, ut); 168 break; 169 default: 170 ut->ut_type = EMPTY; 171 return (ut); 172 } 173 174 FTOU_TYPE(fu, ut); 175 FTOU_TV(fu, ut); 176 return (ut); 177 } 178