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/***
This file is part of systemd.
Copyright (C) 2016 Canonical Ltd.
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <fcntl.h>
#include <unistd.h>
#include "basic/clock-util.h"
#include "basic/fd-util.h"
#include "basic/fileio.h"
#include "basic/log.h"
#include "basic/macro.h"
static void test_clock_is_localtime(void) {
char adjtime[] = "/tmp/test-adjtime.XXXXXX";
int fd = -1;
_cleanup_fclose_ FILE* f = NULL;
static const struct scenario {
const char* contents;
int expected_result;
} scenarios[] = {
/* adjtime configures UTC */
{"0.0 0 0\n0\nUTC\n", 0},
/* adjtime configures local time */
{"0.0 0 0\n0\nLOCAL\n", 1},
/* no final EOL */
{"0.0 0 0\n0\nUTC", 0},
{"0.0 0 0\n0\nLOCAL", 1},
/* empty value -> defaults to UTC */
{"0.0 0 0\n0\n", 0},
/* unknown value -> defaults to UTC */
{"0.0 0 0\n0\nFOO\n", 0},
/* no third line */
{"0.0 0 0", 0},
{"0.0 0 0\n", 0},
{"0.0 0 0\n0", 0},
};
/* without an adjtime file we default to UTC */
assert_se(clock_is_localtime("/nonexisting/adjtime") == 0);
fd = mkostemp_safe(adjtime, O_WRONLY|O_CLOEXEC);
assert_se(fd >= 0);
log_info("adjtime test file: %s", adjtime);
f = fdopen(fd, "w");
assert_se(f);
for (size_t i = 0; i < ELEMENTSOF(scenarios); ++i) {
log_info("scenario #%zu:, expected result %i", i, scenarios[i].expected_result);
log_info("%s", scenarios[i].contents);
rewind(f);
ftruncate(fd, 0);
assert_se(write_string_stream(f, scenarios[i].contents, false) == 0);
assert_se(clock_is_localtime(adjtime) == scenarios[i].expected_result);
}
unlink(adjtime);
}
/* Test with the real /etc/adjtime */
static void test_clock_is_localtime_system(void) {
int r;
r = clock_is_localtime(NULL);
if (access("/etc/adjtime", F_OK) == 0) {
log_info("/etc/adjtime exists, clock_is_localtime() == %i", r);
/* if /etc/adjtime exists we expect some answer, no error or
* crash */
assert_se(r == 0 || r == 1);
} else
/* default is UTC if there is no /etc/adjtime */
assert_se(r == 0);
}
int main(int argc, char *argv[]) {
test_clock_is_localtime();
test_clock_is_localtime_system();
return 0;
}
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