time/tst-tzname.c

   1 /* Test that tzset sets tzname correctly (BZ #19253).
   2    Copyright (C) 2015-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <time.h>
  23
  24 static int
  25 do_test (void)
  26 {
  27   int result = 0;
  28
  29   setenv ("TZ", TZDEFRULES, 1);
  30   tzset ();
  31   const char *stdtz = strdup (tzname[0]);
  32   setenv ("TZ", "STD-1DST", 1);
  33   tzset ();
  34   if (strcmp (tzname[0], "STD") != 0)
  35     {
  36       printf ("FAIL: TZ=STD-1DST, tzname[0] = %s\n", tzname[0]);
  37       result = 1;
  38     }
  39   setenv ("TZ", TZDEFRULES, 1);
  40   tzset ();
  41   if (strcmp (tzname[0], stdtz) != 0)
  42     {
  43       printf ("FAIL: TZ=%s, tzname[0] = %s\n", TZDEFRULES, tzname[0]);
  44       result = 1;
  45     }
  46   return result;
  47 }
  48
  49 #define TEST_FUNCTION do_test ()
  50 #include "../test-skeleton.c"