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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/***
Copyright © 2016 Canonical Ltd.
***/
#include <unistd.h>
#include <fcntl.h>
#include "clock-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "log.h"
#include "macro.h"
#include "tests.h"
#include "tmpfile-util.h"
TEST(clock_is_localtime) {
_cleanup_(unlink_tempfilep) char adjtime[] = "/tmp/test-adjtime.XXXXXX";
_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_FALSE(clock_is_localtime("/nonexisting/adjtime"));
ASSERT_OK(fmkostemp_safe(adjtime, "w", &f));
log_info("adjtime test file: %s", adjtime);
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);
ASSERT_OK_ERRNO(ftruncate(fileno(f), 0));
ASSERT_OK(write_string_stream(f, scenarios[i].contents, WRITE_STRING_FILE_AVOID_NEWLINE));
ASSERT_TRUE(clock_is_localtime(adjtime) == scenarios[i].expected_result);
}
}
/* Test with the real /etc/adjtime */
TEST(clock_is_localtime_system) {
int r;
r = clock_is_localtime(NULL);
if (access("/etc/adjtime", R_OK) == 0) {
log_info("/etc/adjtime is readable, clock_is_localtime() == %i", r);
/* if /etc/adjtime exists we expect some answer, no error or
* crash */
ASSERT_TRUE(IN_SET(r, 0, 1));
} else
/* default is UTC if there is no /etc/adjtime */
ASSERT_TRUE(r == 0 || ERRNO_IS_PRIVILEGE(r));
}
DEFINE_TEST_MAIN(LOG_INFO);
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