1  /* Common tests for utimensat routines.
       2     Copyright (C) 2021-2023 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 <array_length.h>
      20  #include <inttypes.h>
      21  #include <support/support.h>
      22  #include <support/temp_file.h>
      23  #include <stdio.h>
      24  
      25  static int temp_fd = -1;
      26  static char *testfile;
      27  static char *testlink;
      28  
      29  const static struct {
      30    int64_t v1;
      31    int64_t v2;
      32  } tests[] = {
      33    /* Some arbitrary date before Y2038.  */
      34    { 0x60ECA720LL, 0x60eca721LL },
      35    /* Y2038 threshold minus 2 and 1 seconds.  */
      36    { 0x7FFFFFFELL, 0x7FFFFFFFLL },
      37    /* Y2038 threshold plus 1 and 2 seconds.  */
      38    { 0x80000001LL, 0x80000002LL },
      39    /* Around Y2038 threshold.  */
      40    { 0x7FFFFFFELL, 0x80000002LL },
      41    /* Y2106 threshold minus 2 and 1 seconds.  */
      42    { 0x100000000LL, 0xFFFFFFFELL },
      43    /* Y2106 threshold plus 1 and 2 seconds.  */
      44    { 0x100000001LL, 0x100000002LL },
      45    /* Around Y2106 threshold.  */
      46    { 0xFFFFFFFELL, 0xFFFFFFFELL },
      47  };
      48  
      49  #define PREPARE do_prepare
      50  static void
      51  do_prepare (int argc, char *argv[])
      52  {
      53    temp_fd = create_temp_file ("utime", &testfile);
      54    TEST_VERIFY_EXIT (temp_fd > 0);
      55  
      56    testlink = xasprintf ("%s-symlink", testfile);
      57    xsymlink (testfile, testlink);
      58    add_temp_file (testlink);
      59  }
      60  
      61  static int
      62  do_test (void)
      63  {
      64    if (sizeof (time_t) == 8 && !support_path_support_time64 (testfile))
      65      FAIL_UNSUPPORTED ("File %s does not support 64-bit timestamps",
      66  		      testfile);
      67  
      68    bool y2106 = support_path_support_time64_value (testfile,
      69  						  0x100000001LL,
      70  						  0x100000002LL);
      71  
      72    for (int i = 0; i < array_length (tests); i++)
      73      {
      74        /* Check if we run on port with 32 bit time_t size.  */
      75        time_t t;
      76        if (__builtin_add_overflow (tests[i].v1, 0, &t)
      77  	  || __builtin_add_overflow (tests[i].v2, 0, &t))
      78          {
      79            printf ("warning: skipping tests[%d] { %" PRIx64 ", %" PRIx64 " }: "
      80  		  "time_t overflows\n", i, tests[i].v1, tests[i].v2);
      81  	  continue;
      82          }
      83  
      84        if (tests[i].v1 >= 0x100000000LL && !y2106)
      85  	{
      86            printf ("warning: skipping tests[%d] { %" PRIx64 ", %" PRIx64 " }: "
      87  		  "unsupported timestamp value\n",
      88  		  i, tests[i].v1, tests[i].v2);
      89  	  continue;
      90  	}
      91  
      92        TEST_CALL (testfile, temp_fd, testlink, tests[i].v1, tests[i].v2);
      93      }
      94  
      95    return 0;
      96  }
      97  
      98  #include <support/test-driver.c>