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 #include "namespace.h" 31 #include <sys/endian.h> 32 #include <sys/param.h> 33 #include <sys/time.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <utmpx.h> 37 #include "utxdb.h" 38 #include "un-namespace.h" 39 40 #define UTOF_STRING(ut, fu, field) do { \ 41 strncpy((fu)->fu_ ## field, (ut)->ut_ ## field, \ 42 MIN(sizeof (fu)->fu_ ## field, sizeof (ut)->ut_ ## field)); \ 43 } while (0) 44 #define UTOF_ID(ut, fu) do { \ 45 memcpy((fu)->fu_id, (ut)->ut_id, \ 46 MIN(sizeof (fu)->fu_id, sizeof (ut)->ut_id)); \ 47 } while (0) 48 #define UTOF_PID(ut, fu) do { \ 49 (fu)->fu_pid = htobe32((ut)->ut_pid); \ 50 } while (0) 51 #define UTOF_TYPE(ut, fu) do { \ 52 (fu)->fu_type = (ut)->ut_type; \ 53 } while (0) 54 #define UTOF_TV(fu) do { \ 55 struct timeval tv; \ 56 gettimeofday(&tv, NULL); \ 57 (fu)->fu_tv = htobe64((uint64_t)tv.tv_sec * 1000000 + \ 58 (uint64_t)tv.tv_usec); \ 59 } while (0) 60 61 void 62 utx_to_futx(const struct utmpx *ut, struct futx *fu) 63 { 64 65 memset(fu, 0, sizeof *fu); 66 67 switch (ut->ut_type) { 68 case BOOT_TIME: 69 case OLD_TIME: 70 case NEW_TIME: 71 /* Extension: shutdown time. */ 72 case SHUTDOWN_TIME: 73 break; 74 case USER_PROCESS: 75 UTOF_ID(ut, fu); 76 UTOF_STRING(ut, fu, user); 77 UTOF_STRING(ut, fu, line); 78 /* Extension: host name. */ 79 UTOF_STRING(ut, fu, host); 80 UTOF_PID(ut, fu); 81 break; 82 case INIT_PROCESS: 83 UTOF_ID(ut, fu); 84 UTOF_PID(ut, fu); 85 break; 86 case LOGIN_PROCESS: 87 UTOF_ID(ut, fu); 88 UTOF_STRING(ut, fu, user); 89 UTOF_STRING(ut, fu, line); 90 UTOF_PID(ut, fu); 91 break; 92 case DEAD_PROCESS: 93 UTOF_ID(ut, fu); 94 UTOF_PID(ut, fu); 95 break; 96 default: 97 fu->fu_type = EMPTY; 98 return; 99 } 100 101 UTOF_TYPE(ut, fu); 102 UTOF_TV(fu); 103 } 104 105 #define FTOU_STRING(fu, ut, field) do { \ 106 strncpy((ut)->ut_ ## field, (fu)->fu_ ## field, \ 107 MIN(sizeof (ut)->ut_ ## field - 1, sizeof (fu)->fu_ ## field)); \ 108 } while (0) 109 #define FTOU_ID(fu, ut) do { \ 110 memcpy((ut)->ut_id, (fu)->fu_id, \ 111 MIN(sizeof (ut)->ut_id, sizeof (fu)->fu_id)); \ 112 } while (0) 113 #define FTOU_PID(fu, ut) do { \ 114 (ut)->ut_pid = be32toh((fu)->fu_pid); \ 115 } while (0) 116 #define FTOU_TYPE(fu, ut) do { \ 117 (ut)->ut_type = (fu)->fu_type; \ 118 } while (0) 119 #define FTOU_TV(fu, ut) do { \ 120 uint64_t t; \ 121 t = be64toh((fu)->fu_tv); \ 122 (ut)->ut_tv.tv_sec = t / 1000000; \ 123 (ut)->ut_tv.tv_usec = t % 1000000; \ 124 } while (0) 125 126 struct utmpx * 127 futx_to_utx(const struct futx *fu) 128 { 129 static _Thread_local struct utmpx *ut; 130 131 if (ut == NULL) { 132 ut = calloc(1, sizeof *ut); 133 if (ut == NULL) 134 return (NULL); 135 } else 136 memset(ut, 0, sizeof *ut); 137 138 switch (fu->fu_type) { 139 case BOOT_TIME: 140 case OLD_TIME: 141 case NEW_TIME: 142 /* Extension: shutdown time. */ 143 case SHUTDOWN_TIME: 144 break; 145 case USER_PROCESS: 146 FTOU_ID(fu, ut); 147 FTOU_STRING(fu, ut, user); 148 FTOU_STRING(fu, ut, line); 149 /* Extension: host name. */ 150 FTOU_STRING(fu, ut, host); 151 FTOU_PID(fu, ut); 152 break; 153 case INIT_PROCESS: 154 FTOU_ID(fu, ut); 155 FTOU_PID(fu, ut); 156 break; 157 case LOGIN_PROCESS: 158 FTOU_ID(fu, ut); 159 FTOU_STRING(fu, ut, user); 160 FTOU_STRING(fu, ut, line); 161 FTOU_PID(fu, ut); 162 break; 163 case DEAD_PROCESS: 164 FTOU_ID(fu, ut); 165 FTOU_PID(fu, ut); 166 break; 167 default: 168 ut->ut_type = EMPTY; 169 return (ut); 170 } 171 172 FTOU_TYPE(fu, ut); 173 FTOU_TV(fu, ut); 174 return (ut); 175 } 176