1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2010 Ed Schouten <[email protected]>
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
63 void
utx_to_futx(const struct utmpx * ut,struct futx * fu)64 utx_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
128 struct utmpx *
futx_to_utx(const struct futx * fu)129 futx_to_utx(const struct futx *fu)
130 {
131 static _Thread_local struct utmpx *ut;
132
133 if (ut == NULL) {
134 ut = calloc(1, sizeof *ut);
135 if (ut == NULL)
136 return (NULL);
137 } else
138 memset(ut, 0, sizeof *ut);
139
140 switch (fu->fu_type) {
141 case BOOT_TIME:
142 case OLD_TIME:
143 case NEW_TIME:
144 /* Extension: shutdown time. */
145 case SHUTDOWN_TIME:
146 break;
147 case USER_PROCESS:
148 FTOU_ID(fu, ut);
149 FTOU_STRING(fu, ut, user);
150 FTOU_STRING(fu, ut, line);
151 /* Extension: host name. */
152 FTOU_STRING(fu, ut, host);
153 FTOU_PID(fu, ut);
154 break;
155 case INIT_PROCESS:
156 FTOU_ID(fu, ut);
157 FTOU_PID(fu, ut);
158 break;
159 case LOGIN_PROCESS:
160 FTOU_ID(fu, ut);
161 FTOU_STRING(fu, ut, user);
162 FTOU_STRING(fu, ut, line);
163 FTOU_PID(fu, ut);
164 break;
165 case DEAD_PROCESS:
166 FTOU_ID(fu, ut);
167 FTOU_PID(fu, ut);
168 break;
169 default:
170 ut->ut_type = EMPTY;
171 return (ut);
172 }
173
174 FTOU_TYPE(fu, ut);
175 FTOU_TV(fu, ut);
176 return (ut);
177 }
178