Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : /***
       3             :   Copyright © 2016 Canonical Ltd.
       4             : ***/
       5             : 
       6             : #include <unistd.h>
       7             : #include <fcntl.h>
       8             : 
       9             : #include "clock-util.h"
      10             : #include "fd-util.h"
      11             : #include "fileio.h"
      12             : #include "fs-util.h"
      13             : #include "log.h"
      14             : #include "macro.h"
      15             : #include "tmpfile-util.h"
      16             : 
      17           1 : static void test_clock_is_localtime(void) {
      18           1 :         _cleanup_(unlink_tempfilep) char adjtime[] = "/tmp/test-adjtime.XXXXXX";
      19           1 :         _cleanup_fclose_ FILE* f = NULL;
      20             : 
      21             :         static const struct scenario {
      22             :                 const char* contents;
      23             :                 int expected_result;
      24             :         } scenarios[] = {
      25             :                 /* adjtime configures UTC */
      26             :                 {"0.0 0 0\n0\nUTC\n", 0},
      27             :                 /* adjtime configures local time */
      28             :                 {"0.0 0 0\n0\nLOCAL\n", 1},
      29             :                 /* no final EOL */
      30             :                 {"0.0 0 0\n0\nUTC", 0},
      31             :                 {"0.0 0 0\n0\nLOCAL", 1},
      32             :                 /* empty value -> defaults to UTC */
      33             :                 {"0.0 0 0\n0\n", 0},
      34             :                 /* unknown value -> defaults to UTC */
      35             :                 {"0.0 0 0\n0\nFOO\n", 0},
      36             :                 /* no third line */
      37             :                 {"0.0 0 0", 0},
      38             :                 {"0.0 0 0\n", 0},
      39             :                 {"0.0 0 0\n0", 0},
      40             :         };
      41             : 
      42             :         /* without an adjtime file we default to UTC */
      43           1 :         assert_se(clock_is_localtime("/nonexisting/adjtime") == 0);
      44             : 
      45           1 :         assert_se(fmkostemp_safe(adjtime, "w", &f) == 0);
      46           1 :         log_info("adjtime test file: %s", adjtime);
      47             : 
      48          10 :         for (size_t i = 0; i < ELEMENTSOF(scenarios); ++i) {
      49           9 :                 log_info("scenario #%zu:, expected result %i", i, scenarios[i].expected_result);
      50           9 :                 log_info("%s", scenarios[i].contents);
      51           9 :                 rewind(f);
      52           9 :                 ftruncate(fileno(f), 0);
      53           9 :                 assert_se(write_string_stream(f, scenarios[i].contents, WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
      54           9 :                 assert_se(clock_is_localtime(adjtime) == scenarios[i].expected_result);
      55             :         }
      56           1 : }
      57             : 
      58             : /* Test with the real /etc/adjtime */
      59           1 : static void test_clock_is_localtime_system(void) {
      60             :         int r;
      61           1 :         r = clock_is_localtime(NULL);
      62             : 
      63           1 :         if (access("/etc/adjtime", F_OK) == 0) {
      64           1 :                 log_info("/etc/adjtime exists, clock_is_localtime() == %i", r);
      65             :                 /* if /etc/adjtime exists we expect some answer, no error or
      66             :                  * crash */
      67           1 :                 assert_se(IN_SET(r, 0, 1));
      68             :         } else
      69             :                 /* default is UTC if there is no /etc/adjtime */
      70           0 :                 assert_se(r == 0);
      71           1 : }
      72             : 
      73           1 : int main(int argc, char *argv[]) {
      74           1 :         test_clock_is_localtime();
      75           1 :         test_clock_is_localtime_system();
      76             : 
      77           1 :         return 0;
      78             : }