1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 63void 64utx_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 128struct utmpx * 129futx_to_utx(const struct futx *fu) 130{ 131#ifdef __NO_TLS 132 static struct utmpx *ut; 133#else 134 static _Thread_local struct utmpx *ut; 135#endif 136 137 if (ut == NULL) { 138 ut = calloc(1, sizeof *ut); 139 if (ut == NULL) 140 return (NULL); 141 } else 142 memset(ut, 0, sizeof *ut); 143 144 switch (fu->fu_type) { 145 case BOOT_TIME: 146 case OLD_TIME: 147 case NEW_TIME: 148 /* Extension: shutdown time. */ 149 case SHUTDOWN_TIME: 150 break; 151 case USER_PROCESS: 152 FTOU_ID(fu, ut); 153 FTOU_STRING(fu, ut, user); 154 FTOU_STRING(fu, ut, line); 155 /* Extension: host name. */ 156 FTOU_STRING(fu, ut, host); 157 FTOU_PID(fu, ut); 158 break; 159 case INIT_PROCESS: 160 FTOU_ID(fu, ut); 161 FTOU_PID(fu, ut); 162 break; 163 case LOGIN_PROCESS: 164 FTOU_ID(fu, ut); 165 FTOU_STRING(fu, ut, user); 166 FTOU_STRING(fu, ut, line); 167 FTOU_PID(fu, ut); 168 break; 169 case DEAD_PROCESS: 170 FTOU_ID(fu, ut); 171 FTOU_PID(fu, ut); 172 break; 173 default: 174 ut->ut_type = EMPTY; 175 return (ut); 176 } 177 178 FTOU_TYPE(fu, ut); 179 FTOU_TV(fu, ut); 180 return (ut); 181} 182