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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
6369641d MP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright (C) 2016 Canonical Ltd. | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <unistd.h> | |
22 | #include <fcntl.h> | |
23 | ||
fe4f8fd1 ZJS |
24 | #include "clock-util.h" |
25 | #include "fd-util.h" | |
6369641d MP |
26 | #include "fileio.h" |
27 | #include "log.h" | |
fe4f8fd1 | 28 | #include "macro.h" |
6369641d MP |
29 | |
30 | static void test_clock_is_localtime(void) { | |
31 | char adjtime[] = "/tmp/test-adjtime.XXXXXX"; | |
07edd3b9 MP |
32 | int fd = -1; |
33 | _cleanup_fclose_ FILE* f = NULL; | |
6369641d | 34 | |
fe4f8fd1 | 35 | static const struct scenario { |
6369641d MP |
36 | const char* contents; |
37 | int expected_result; | |
38 | } scenarios[] = { | |
39 | /* adjtime configures UTC */ | |
40 | {"0.0 0 0\n0\nUTC\n", 0}, | |
41 | /* adjtime configures local time */ | |
42 | {"0.0 0 0\n0\nLOCAL\n", 1}, | |
43 | /* no final EOL */ | |
44 | {"0.0 0 0\n0\nUTC", 0}, | |
45 | {"0.0 0 0\n0\nLOCAL", 1}, | |
35f7216f MP |
46 | /* empty value -> defaults to UTC */ |
47 | {"0.0 0 0\n0\n", 0}, | |
6369641d MP |
48 | /* unknown value -> defaults to UTC */ |
49 | {"0.0 0 0\n0\nFOO\n", 0}, | |
35f7216f MP |
50 | /* no third line */ |
51 | {"0.0 0 0", 0}, | |
52 | {"0.0 0 0\n", 0}, | |
53 | {"0.0 0 0\n0", 0}, | |
6369641d MP |
54 | }; |
55 | ||
56 | /* without an adjtime file we default to UTC */ | |
57 | assert_se(clock_is_localtime("/nonexisting/adjtime") == 0); | |
58 | ||
646853bd | 59 | fd = mkostemp_safe(adjtime); |
d69d951b | 60 | assert_se(fd >= 0); |
6369641d MP |
61 | log_info("adjtime test file: %s", adjtime); |
62 | f = fdopen(fd, "w"); | |
d69d951b | 63 | assert_se(f); |
6369641d MP |
64 | |
65 | for (size_t i = 0; i < ELEMENTSOF(scenarios); ++i) { | |
66 | log_info("scenario #%zu:, expected result %i", i, scenarios[i].expected_result); | |
67 | log_info("%s", scenarios[i].contents); | |
68 | rewind(f); | |
69 | ftruncate(fd, 0); | |
b1837133 | 70 | assert_se(write_string_stream(f, scenarios[i].contents, WRITE_STRING_FILE_AVOID_NEWLINE) == 0); |
6369641d MP |
71 | assert_se(clock_is_localtime(adjtime) == scenarios[i].expected_result); |
72 | } | |
73 | ||
74 | unlink(adjtime); | |
75 | } | |
76 | ||
77 | /* Test with the real /etc/adjtime */ | |
78 | static void test_clock_is_localtime_system(void) { | |
79 | int r; | |
80 | r = clock_is_localtime(NULL); | |
81 | ||
82 | if (access("/etc/adjtime", F_OK) == 0) { | |
83 | log_info("/etc/adjtime exists, clock_is_localtime() == %i", r); | |
35f7216f MP |
84 | /* if /etc/adjtime exists we expect some answer, no error or |
85 | * crash */ | |
4c701096 | 86 | assert_se(IN_SET(r, 0, 1)); |
6369641d MP |
87 | } else |
88 | /* default is UTC if there is no /etc/adjtime */ | |
d69d951b | 89 | assert_se(r == 0); |
6369641d MP |
90 | } |
91 | ||
92 | int main(int argc, char *argv[]) { | |
93 | test_clock_is_localtime(); | |
94 | test_clock_is_localtime_system(); | |
95 | ||
96 | return 0; | |
97 | } |