tests/test-futimens.h

   1 /* Test of file timestamp modification functions.
   2    Copyright (C) 2009-2017 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 <http://www.gnu.org/licenses/>.  */
  16
  17 #include "test-utimens-common.h"
  18
  19 /* This file is designed to test both fdutimens(a,NULL,b) and
  20    futimens(a,b).  FUNC is the function to test.  Assumes that BASE
  21    and ASSERT are already defined.  If PRINT, warn before skipping
  22    tests with status 77.  */
  23 static int
  24 test_futimens (int (*func) (int, struct timespec const *),
  25                bool print)
  26 {
  27   int fd = creat (BASE "file", 0600);
  28   int result;
  29   struct stat st1;
  30   struct stat st2;
  31   ASSERT (0 <= fd);
  32
  33   /* Sanity check.  */
  34   ASSERT (fstat (fd, &st1) == 0);
  35   nap ();
  36   errno = 0;
  37   result = func (fd, NULL);
  38   if (result == -1 && errno == ENOSYS)
  39     {
  40       ASSERT (close (fd) == 0);
  41       ASSERT (unlink (BASE "file") == 0);
  42       if (print)
  43         fputs ("skipping test: "
  44                "setting fd time not supported on this file system\n",
  45                stderr);
  46       return 77;
  47     }
  48   ASSERT (!result);
  49   ASSERT (fstat (fd, &st2) == 0);
  50   /* If utimens truncates to less resolution than the file system
  51      supports, then time can appear to go backwards between now and a
  52      follow-up utimens with UTIME_NOW or a NULL timespec.  Use
  53      UTIMECMP_TRUNCATE_SOURCE to compensate, with st1 as the
  54      source.  */
  55   ASSERT (0 <= utimecmp (BASE "file", &st2, &st1, UTIMECMP_TRUNCATE_SOURCE));
  56   if (check_ctime)
  57     ASSERT (ctime_compare (&st1, &st2) < 0);
  58   {
  59     /* On some NFS systems, the 'now' timestamp of creat or a NULL
  60        timespec is determined by the server, but the 'now' timestamp
  61        determined by gettime() (as is done when using UTIME_NOW) is
  62        determined by the client; since the two machines are not
  63        necessarily on the same clock, this is another case where time
  64        can appear to go backwards.  The rest of this test cares about
  65        client time, so manually use gettime() to set both times.  */
  66     struct timespec ts[2];
  67     gettime (&ts[0]);
  68     ts[1] = ts[0];
  69     ASSERT (func (fd, ts) == 0);
  70     ASSERT (fstat (fd, &st1) == 0);
  71     nap ();
  72   }
  73
  74   /* Invalid arguments.  */
  75   {
  76     errno = 0;
  77     ASSERT (func (AT_FDCWD, NULL) == -1);
  78     ASSERT (errno == EBADF);
  79   }
  80   {
  81     errno = 0;
  82     ASSERT (func (-1, NULL) == -1);
  83     ASSERT (errno == EBADF);
  84   }
  85   {
  86     close (99);
  87     errno = 0;
  88     ASSERT (func (99, NULL) == -1);
  89     ASSERT (errno == EBADF);
  90   }
  91   {
  92     int fd0 = dup (0);
  93     ASSERT (0 <= fd0);
  94     ASSERT (close (fd0) == 0);
  95     errno = 0;
  96     ASSERT (func (fd0, NULL) == -1);
  97     ASSERT (errno == EBADF);
  98   }
  99   {
 100     struct timespec ts[2] = { { Y2K, UTIME_BOGUS_POS }, { Y2K, 0 } };
 101     errno = 0;
 102     ASSERT (func (fd, ts) == -1);
 103     ASSERT (errno == EINVAL);
 104   }
 105   {
 106     struct timespec ts[2] = { { Y2K, 0 }, { Y2K, UTIME_BOGUS_NEG } };
 107     errno = 0;
 108     ASSERT (func (fd, ts) == -1);
 109     ASSERT (errno == EINVAL);
 110   }
 111   ASSERT (fstat (fd, &st2) == 0);
 112   ASSERT (st1.st_atime == st2.st_atime);
 113   ASSERT (get_stat_atime_ns (&st1) == get_stat_atime_ns (&st2));
 114   ASSERT (utimecmp (BASE "file", &st1, &st2, 0) == 0);
 115
 116   /* Set both times.  */
 117   {
 118     struct timespec ts[2] = { { Y2K, BILLION / 2 - 1 }, { Y2K, BILLION - 1 } };
 119     ASSERT (func (fd, ts) == 0);
 120     ASSERT (fstat (fd, &st2) == 0);
 121     ASSERT (st2.st_atime == Y2K);
 122     ASSERT (0 <= get_stat_atime_ns (&st2));
 123     ASSERT (get_stat_atime_ns (&st2) < BILLION / 2);
 124     ASSERT (st2.st_mtime == Y2K);
 125     ASSERT (0 <= get_stat_mtime_ns (&st2));
 126     ASSERT (get_stat_mtime_ns (&st2) < BILLION);
 127     if (check_ctime)
 128       ASSERT (ctime_compare (&st1, &st2) < 0);
 129   }
 130
 131   /* Play with UTIME_OMIT, UTIME_NOW.  */
 132   {
 133     struct stat st3;
 134     struct timespec ts[2] = { { BILLION, UTIME_OMIT }, { 0, UTIME_NOW } };
 135     nap ();
 136     ASSERT (func (fd, ts) == 0);
 137     ASSERT (fstat (fd, &st3) == 0);
 138     ASSERT (st3.st_atime == Y2K);
 139     ASSERT (0 <= get_stat_atime_ns (&st3));
 140     ASSERT (get_stat_atime_ns (&st3) <= BILLION / 2);
 141     ASSERT (utimecmp (BASE "file", &st1, &st3, 0) <= 0);
 142     if (check_ctime)
 143       ASSERT (ctime_compare (&st2, &st3) < 0);
 144     nap ();
 145     ts[0].tv_nsec = 0;
 146     ts[1].tv_nsec = UTIME_OMIT;
 147     ASSERT (func (fd, ts) == 0);
 148     ASSERT (fstat (fd, &st2) == 0);
 149     ASSERT (st2.st_atime == BILLION);
 150     ASSERT (get_stat_atime_ns (&st2) == 0);
 151     ASSERT (st3.st_mtime == st2.st_mtime);
 152     ASSERT (get_stat_mtime_ns (&st3) == get_stat_mtime_ns (&st2));
 153     if (check_ctime)
 154       ASSERT (ctime_compare (&st3, &st2) < 0);
 155   }
 156
 157   /* Cleanup.  */
 158   ASSERT (close (fd) == 0);
 159   ASSERT (unlink (BASE "file") == 0);
 160   return 0;
 161 }