1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* Copyright (c) 2009-2015, 2018 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <sys/types.h>
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif /* HAVE_STDBOOL_H */
#ifdef HAVE_STRING_H
# include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif /* HAVE_STRINGS_H */
#include <errno.h>
#include <limits.h>
#include <time.h>
#ifndef __linux__
# if defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
# include <sys/sysctl.h>
# elif defined(HAVE_GETUTXID)
# include <utmpx.h>
# elif defined(HAVE_GETUTID)
# include <utmp.h>
# endif
#endif /* !__linux__ */
#include "sudoers.h"
/*
* Fill in a struct timespec with the time the system booted.
* Returns 1 on success and 0 on failure.
*/
#if defined(__linux__)
bool
get_boottime(struct timespec *ts)
{
char *line = NULL;
size_t linesize = 0;
bool found = false;
long long llval;
ssize_t len;
FILE *fp;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
/* read btime from /proc/stat */
fp = fopen("/proc/stat", "r");
if (fp != NULL) {
while ((len = getline(&line, &linesize, fp)) != -1) {
if (strncmp(line, "btime ", 6) == 0) {
if (line[len - 1] == '\n')
line[len - 1] = '\0';
llval = strtonum(line + 6, 1, LLONG_MAX, NULL);
if (llval > 0) {
ts->tv_sec = (time_t)llval;
ts->tv_nsec = 0;
found = true;
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"found btime in /proc/stat: %lld", llval);
break;
} else {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"invalid btime in /proc/stat: %s", line);
}
}
}
fclose(fp);
free(line);
}
debug_return_bool(found);
}
#elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
bool
get_boottime(struct timespec *ts)
{
size_t size;
int mib[2];
struct timeval tv;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
mib[0] = CTL_KERN;
mib[1] = KERN_BOOTTIME;
size = sizeof(tv);
if (sysctl(mib, 2, &tv, &size, NULL, 0) != -1) {
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"KERN_BOOTTIME: %lld, %ld", (long long)tv.tv_sec, (long)tv.tv_usec);
TIMEVAL_TO_TIMESPEC(&tv, ts);
debug_return_bool(true);
}
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"KERN_BOOTTIME: %s", strerror(errno));
debug_return_bool(false);
}
#elif defined(HAVE_GETUTXID)
bool
get_boottime(struct timespec *ts)
{
struct utmpx *ut, key;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
memset(&key, 0, sizeof(key));
key.ut_type = BOOT_TIME;
setutxent();
if ((ut = getutxid(&key)) != NULL) {
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"BOOT_TIME: %lld, %ld", (long long)ut->ut_tv.tv_sec,
(long)ut->ut_tv.tv_usec);
TIMEVAL_TO_TIMESPEC(&ut->ut_tv, ts);
}
endutxent();
debug_return_bool(ut != NULL);
}
#elif defined(HAVE_GETUTID)
bool
get_boottime(struct timespec *ts)
{
struct utmp *ut, key;
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
memset(&key, 0, sizeof(key));
key.ut_type = BOOT_TIME;
setutent();
if ((ut = getutid(&key)) != NULL) {
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"BOOT_TIME: %lld", (long long)ut->ut_time);
ts->tv_sec = ut->ut_time;
ts->tv_nsec = 0;
}
endutent();
debug_return_bool(ut != NULL);
}
#else
bool
get_boottime(struct timespec *ts)
{
debug_decl(get_boottime, SUDOERS_DEBUG_UTIL)
debug_return_bool(false);
}
#endif
|
