tests/test-utime.c

   1 /* Tests of utime.
   2    Copyright (C) 2017-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 #include <utime.h>
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 #include "ignore-value.h"
  25 #include "macros.h"
  26
  27 #define BASE "test-utime.t"
  28
  29 #include "test-utimens-common.h"
  30
  31 /* If PRINT, warn before skipping tests with status 77.  */
  32 static int
  33 test_utime (bool print)
  34 {
  35   struct stat st1;
  36   struct stat st2;
  37
  38   ASSERT (close (creat (BASE "file", 0600)) == 0);
  39   ASSERT (stat (BASE "file", &st1) == 0);
  40   nap ();
  41   ASSERT (utime (BASE "file", NULL) == 0);
  42   ASSERT (stat (BASE "file", &st2) == 0);
  43   ASSERT (0 <= utimecmp (BASE "file", &st2, &st1, UTIMECMP_TRUNCATE_SOURCE));
  44   if (check_ctime)
  45     ASSERT (ctime_compare (&st1, &st2) < 0);
  46   {
  47     /* On some NFS systems, the 'now' timestamp of creat or a NULL
  48        utimbuf is determined by the server, but the 'now' timestamp
  49        determined by time() is determined by the client; since the two
  50        machines are not necessarily on the same clock, this is another
  51        case where time can appear to go backwards.  The rest of this
  52        test cares about client time, so manually use time() to set
  53        both times.  */
  54     struct utimbuf ts;
  55     ts.actime = ts.modtime = time (NULL);
  56     ASSERT (utime (BASE "file", &ts) == 0);
  57     ASSERT (stat (BASE "file", &st1) == 0);
  58     nap ();
  59   }
  60
  61   /* Invalid arguments.  */
  62   errno = 0;
  63   ASSERT (utime ("no_such", NULL) == -1);
  64   ASSERT (errno == ENOENT);
  65   errno = 0;
  66   ASSERT (utime ("no_such/", NULL) == -1);
  67   ASSERT (errno == ENOENT || errno == ENOTDIR);
  68   errno = 0;
  69   ASSERT (utime ("", NULL) == -1);
  70   ASSERT (errno == ENOENT);
  71   {
  72     struct utimbuf ts;
  73     ts.actime = ts.modtime = Y2K;
  74     errno = 0;
  75     ASSERT (utime (BASE "file/", &ts) == -1);
  76     ASSERT (errno == ENOTDIR || errno == EINVAL);
  77   }
  78   ASSERT (stat (BASE "file", &st2) == 0);
  79   ASSERT (st1.st_atime == st2.st_atime);
  80   ASSERT (get_stat_atime_ns (&st1) == get_stat_atime_ns (&st2));
  81   ASSERT (utimecmp (BASE "file", &st1, &st2, 0) == 0);
  82
  83   /* Set both times.  */
  84   {
  85     struct utimbuf ts;
  86     ts.actime = ts.modtime = Y2K;
  87     ASSERT (utime (BASE "file", &ts) == 0);
  88     ASSERT (stat (BASE "file", &st2) == 0);
  89     ASSERT (st2.st_atime == Y2K);
  90     ASSERT (0 <= get_stat_atime_ns (&st2));
  91     ASSERT (get_stat_atime_ns (&st2) < BILLION / 2);
  92     ASSERT (st2.st_mtime == Y2K);
  93     ASSERT (0 <= get_stat_mtime_ns (&st2));
  94     ASSERT (get_stat_mtime_ns (&st2) < BILLION);
  95     if (check_ctime)
  96       ASSERT (ctime_compare (&st1, &st2) < 0);
  97   }
  98
  99   /* Make sure this dereferences symlinks.  */
 100   if (symlink (BASE "file", BASE "link"))
 101     {
 102       ASSERT (unlink (BASE "file") == 0);
 103       if (test_exit_status != EXIT_SUCCESS)
 104         return test_exit_status;
 105       if (print)
 106         fputs ("skipping test: symlinks not supported on this file system\n",
 107                stderr);
 108       return 77;
 109     }
 110   ASSERT (lstat (BASE "link", &st1) == 0);
 111   ASSERT (st1.st_mtime != Y2K);
 112   errno = 0;
 113   ASSERT (utime (BASE "link/", NULL) == -1);
 114   ASSERT (errno == ENOTDIR);
 115   {
 116     struct utimbuf ts;
 117     ts.actime = ts.modtime = Y2K;
 118     ASSERT (utime (BASE "link", &ts) == 0);
 119     ASSERT (lstat (BASE "link", &st2) == 0);
 120     /* Can't compare atimes, since lstat() changes symlink atime on cygwin.  */
 121     ASSERT (st1.st_mtime == st2.st_mtime);
 122     ASSERT (stat (BASE "link", &st2) == 0);
 123     ASSERT (st2.st_mtime == Y2K);
 124     ASSERT (get_stat_mtime_ns (&st2) == 0);
 125   }
 126
 127   /* Cleanup.  */
 128   ASSERT (unlink (BASE "link") == 0);
 129   ASSERT (unlink (BASE "file") == 0);
 130   return 0;
 131 }
 132
 133 int
 134 main (void)
 135 {
 136   int result1; /* Skip because of no symlink support.  */
 137
 138   /* Clean up any trash from prior testsuite runs.  */
 139   ignore_value (system ("rm -rf " BASE "*"));
 140
 141   result1 = test_utime (true);
 142   return (result1 ? result1 : test_exit_status);
 143 }