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