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
38static void
39ulog_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	strlcpy(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
62void
63ulog_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	strlcpy(utx.ut_user, user, sizeof utx.ut_user);
70	if (host != NULL)
71		strlcpy(utx.ut_host, host, sizeof utx.ut_host);
72	pututxline(&utx);
73}
74
75void
76ulog_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