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 "namespace.h" 30 #include <sys/endian.h> 31 #include <sys/param.h> 32 #include <sys/time.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <utmpx.h> 36 #include "utxdb.h" 37 #include "un-namespace.h" 38 39 #define UTOF_STRING(ut, fu, field) do { \ 40 strncpy((fu)->fu_ ## field, (ut)->ut_ ## field, \ 41 MIN(sizeof (fu)->fu_ ## field, sizeof (ut)->ut_ ## field)); \ 42 } while (0) 43 #define UTOF_ID(ut, fu) do { \ 44 memcpy((fu)->fu_id, (ut)->ut_id, \ 45 MIN(sizeof (fu)->fu_id, sizeof (ut)->ut_id)); \ 46 } while (0) 47 #define UTOF_PID(ut, fu) do { \ 48 (fu)->fu_pid = htobe32((ut)->ut_pid); \ 49 } while (0) 50 #define UTOF_TYPE(ut, fu) do { \ 51 (fu)->fu_type = (ut)->ut_type; \ 52 } while (0) 53 #define UTOF_TV(fu) do { \ 54 struct timeval tv; \ 55 gettimeofday(&tv, NULL); \ 56 (fu)->fu_tv = htobe64((uint64_t)tv.tv_sec * 1000000 + \ 57 (uint64_t)tv.tv_usec); \ 58 } while (0) 59 60 void 61 utx_to_futx(const struct utmpx *ut, struct futx *fu) 62 { 63 64 memset(fu, 0, sizeof *fu); 65 66 switch (ut->ut_type) { 67 case BOOT_TIME: 68 case OLD_TIME: 69 case NEW_TIME: 70 /* Extension: shutdown time. */ 71 case SHUTDOWN_TIME: 72 break; 73 case USER_PROCESS: 74 UTOF_ID(ut, fu); 75 UTOF_STRING(ut, fu, user); 76 UTOF_STRING(ut, fu, line); 77 /* Extension: host name. */ 78 UTOF_STRING(ut, fu, host); 79 UTOF_PID(ut, fu); 80 break; 81 case INIT_PROCESS: 82 UTOF_ID(ut, fu); 83 UTOF_PID(ut, fu); 84 break; 85 case LOGIN_PROCESS: 86 UTOF_ID(ut, fu); 87 UTOF_STRING(ut, fu, user); 88 UTOF_STRING(ut, fu, line); 89 UTOF_PID(ut, fu); 90 break; 91 case DEAD_PROCESS: 92 UTOF_ID(ut, fu); 93 UTOF_PID(ut, fu); 94 break; 95 default: 96 fu->fu_type = EMPTY; 97 return; 98 } 99 100 UTOF_TYPE(ut, fu); 101 UTOF_TV(fu); 102 } 103 104 #define FTOU_STRING(fu, ut, field) do { \ 105 strncpy((ut)->ut_ ## field, (fu)->fu_ ## field, \ 106 MIN(sizeof (ut)->ut_ ## field - 1, sizeof (fu)->fu_ ## field)); \ 107 } while (0) 108 #define FTOU_ID(fu, ut) do { \ 109 memcpy((ut)->ut_id, (fu)->fu_id, \ 110 MIN(sizeof (ut)->ut_id, sizeof (fu)->fu_id)); \ 111 } while (0) 112 #define FTOU_PID(fu, ut) do { \ 113 (ut)->ut_pid = be32toh((fu)->fu_pid); \ 114 } while (0) 115 #define FTOU_TYPE(fu, ut) do { \ 116 (ut)->ut_type = (fu)->fu_type; \ 117 } while (0) 118 #define FTOU_TV(fu, ut) do { \ 119 uint64_t t; \ 120 t = be64toh((fu)->fu_tv); \ 121 (ut)->ut_tv.tv_sec = t / 1000000; \ 122 (ut)->ut_tv.tv_usec = t % 1000000; \ 123 } while (0) 124 125 struct utmpx * 126 futx_to_utx(const struct futx *fu) 127 { 128 static _Thread_local struct utmpx *ut; 129 130 if (ut == NULL) { 131 ut = calloc(1, sizeof *ut); 132 if (ut == NULL) 133 return (NULL); 134 } else 135 memset(ut, 0, sizeof *ut); 136 137 switch (fu->fu_type) { 138 case BOOT_TIME: 139 case OLD_TIME: 140 case NEW_TIME: 141 /* Extension: shutdown time. */ 142 case SHUTDOWN_TIME: 143 break; 144 case USER_PROCESS: 145 FTOU_ID(fu, ut); 146 FTOU_STRING(fu, ut, user); 147 FTOU_STRING(fu, ut, line); 148 /* Extension: host name. */ 149 FTOU_STRING(fu, ut, host); 150 FTOU_PID(fu, ut); 151 break; 152 case INIT_PROCESS: 153 FTOU_ID(fu, ut); 154 FTOU_PID(fu, ut); 155 break; 156 case LOGIN_PROCESS: 157 FTOU_ID(fu, ut); 158 FTOU_STRING(fu, ut, user); 159 FTOU_STRING(fu, ut, line); 160 FTOU_PID(fu, ut); 161 break; 162 case DEAD_PROCESS: 163 FTOU_ID(fu, ut); 164 FTOU_PID(fu, ut); 165 break; 166 default: 167 ut->ut_type = EMPTY; 168 return (ut); 169 } 170 171 FTOU_TYPE(fu, ut); 172 FTOU_TV(fu, ut); 173 return (ut); 174 } 175