1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/param.h> 30 #include <sys/time.h> 31 #include <paths.h> 32 #include <sha.h> 33 #include <string.h> 34 #include <unistd.h> 35 #include <utmpx.h> 36 #include "ulog.h" 37 38 static void 39 ulog_fill(struct utmpx *utx, const char *line) 40 { 41 SHA_CTX c; 42 char id[SHA_DIGEST_LENGTH]; 43 44 /* Remove /dev/ component. */ 45 if (strncmp(line, _PATH_DEV, sizeof _PATH_DEV - 1) == 0) 46 line += sizeof _PATH_DEV - 1; 47 48 memset(utx, 0, sizeof *utx); 49 50 utx->ut_pid = getpid(); 51 gettimeofday(&utx->ut_tv, NULL); 52 strncpy(utx->ut_line, line, sizeof utx->ut_line); 53 54 SHA1_Init(&c); 55 SHA1_Update(&c, "libulog", 7); 56 SHA1_Update(&c, utx->ut_line, sizeof utx->ut_line); 57 SHA1_Final(id, &c); 58 59 memcpy(utx->ut_id, id, MIN(sizeof utx->ut_id, sizeof id)); 60 } 61 62 void 63 ulog_login(const char *line, const char *user, const char *host) 64 { 65 struct utmpx utx; 66 67 ulog_fill(&utx, line); 68 utx.ut_type = USER_PROCESS; 69 strncpy(utx.ut_user, user, sizeof utx.ut_user); 70 if (host != NULL) 71 strncpy(utx.ut_host, host, sizeof utx.ut_host); 72 pututxline(&utx); 73 } 74 75 void 76 ulog_logout(const char *line) 77 { 78 struct utmpx utx; 79 80 ulog_fill(&utx, line); 81 utx.ut_type = DEAD_PROCESS; 82 pututxline(&utx); 83 } 84