1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 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 <sys/param.h> 33 #include <sys/time.h> 34 #include <paths.h> 35 #include <sha.h> 36 #include <string.h> 37 #include <unistd.h> 38 #include <utmpx.h> 39 #include "ulog.h" 40 41 static void 42 ulog_fill(struct utmpx *utx, const char *line) 43 { 44 SHA_CTX c; 45 char id[SHA_DIGEST_LENGTH]; 46 47 /* Remove /dev/ component. */ 48 if (strncmp(line, _PATH_DEV, sizeof _PATH_DEV - 1) == 0) 49 line += sizeof _PATH_DEV - 1; 50 51 memset(utx, 0, sizeof *utx); 52 53 utx->ut_pid = getpid(); 54 gettimeofday(&utx->ut_tv, NULL); 55 strncpy(utx->ut_line, line, sizeof utx->ut_line); 56 57 SHA1_Init(&c); 58 SHA1_Update(&c, "libulog", 7); 59 SHA1_Update(&c, utx->ut_line, sizeof utx->ut_line); 60 SHA1_Final(id, &c); 61 62 memcpy(utx->ut_id, id, MIN(sizeof utx->ut_id, sizeof id)); 63 } 64 65 void 66 ulog_login(const char *line, const char *user, const char *host) 67 { 68 struct utmpx utx; 69 70 ulog_fill(&utx, line); 71 utx.ut_type = USER_PROCESS; 72 strncpy(utx.ut_user, user, sizeof utx.ut_user); 73 if (host != NULL) 74 strncpy(utx.ut_host, host, sizeof utx.ut_host); 75 pututxline(&utx); 76 } 77 78 void 79 ulog_logout(const char *line) 80 { 81 struct utmpx utx; 82 83 ulog_fill(&utx, line); 84 utx.ut_type = DEAD_PROCESS; 85 pututxline(&utx); 86 } 87