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-rw-r--r--src/test/test-clock.c93
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diff --git a/src/test/test-clock.c b/src/test/test-clock.c
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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 <unistd.h>
+#include <fcntl.h>
+
+#include "macro.h"
+#include "fileio.h"
+#include "log.h"
+#include "clock-util.h"
+
+static void test_clock_is_localtime(void) {
+ char adjtime[] = "/tmp/test-adjtime.XXXXXX";
+ int fd;
+ FILE* f;
+
+ 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},
+ /* unknown value -> defaults to UTC */
+ {"0.0 0 0\n0\nFOO\n", 0},
+ /* gibberish */
+ {"br0ken", -EIO},
+ };
+
+ /* 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(fd > 0);
+ log_info("adjtime test file: %s", adjtime);
+ f = fdopen(fd, "w");
+ assert(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);
+ /* we cannot assert much if /etc/adjtime exists, just that we
+ * expect either an answer, or an EIO if the local file really
+ * is badly malformed. I. e. we don't expect any other error
+ * code or crash. */
+ assert(r == 0 || r == 1 || r == -EIO);
+ } else
+ /* default is UTC if there is no /etc/adjtime */
+ assert(r == 0);
+}
+
+int main(int argc, char *argv[]) {
+ test_clock_is_localtime();
+ test_clock_is_localtime_system();
+
+ return 0;
+}