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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright (C) 2016 Canonical Ltd.
***/
#include <unistd.h>
#include <fcntl.h>
#include "clock-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "log.h"
#include "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);
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, WRITE_STRING_FILE_AVOID_NEWLINE) == 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(IN_SET(r, 0, 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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