tests/test-stat-time.c

   1 /* Test of <stat-time.h>.
   2    Copyright (C) 2007-2017 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 /* Written by James Youngman <jay@gnu.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include "stat-time.h"
  22
  23 #include <fcntl.h>
  24 #include <signal.h>
  25 #include <sys/stat.h>
  26 #include <unistd.h>
  27
  28 #include "macros.h"
  29
  30 #define BASE "test-stat-time.t"
  31 #include "nap.h"
  32
  33 enum { NFILES = 4 };
  34
  35 static int
  36 force_unlink (const char *filename)
  37 {
  38   /* This chmod is necessary on mingw, where unlink() of a read-only file
  39      fails with EPERM.  */
  40   chmod (filename, 0600);
  41   return unlink (filename);
  42 }
  43
  44 static void
  45 cleanup (int sig)
  46 {
  47   /* Remove temporary files.  */
  48   force_unlink ("t-stt-stamp1");
  49   force_unlink ("t-stt-testfile");
  50   force_unlink ("t-stt-stamp2");
  51   force_unlink ("t-stt-renamed");
  52   force_unlink ("t-stt-stamp3");
  53
  54   if (sig != 0)
  55     _exit (1);
  56 }
  57
  58 static int
  59 open_file (const char *filename, int flags)
  60 {
  61   int fd = open (filename, flags | O_WRONLY, 0500);
  62   if (fd >= 0)
  63     {
  64       close (fd);
  65       return 1;
  66     }
  67   else
  68     {
  69       return 0;
  70     }
  71 }
  72
  73 static void
  74 create_file (const char *filename)
  75 {
  76   ASSERT (open_file (filename, O_CREAT | O_EXCL));
  77 }
  78
  79 static void
  80 do_stat (const char *filename, struct stat *p)
  81 {
  82   ASSERT (stat (filename, p) == 0);
  83 }
  84
  85 static void
  86 prepare_test (struct stat *statinfo, struct timespec *modtimes)
  87 {
  88   int i;
  89
  90   create_file ("t-stt-stamp1");
  91   nap ();
  92   create_file ("t-stt-testfile");
  93   nap ();
  94   create_file ("t-stt-stamp2");
  95   nap ();
  96   ASSERT (chmod ("t-stt-testfile", 0400) == 0);
  97   nap ();
  98   create_file ("t-stt-stamp3");
  99
 100   do_stat ("t-stt-stamp1",  &statinfo[0]);
 101   do_stat ("t-stt-testfile", &statinfo[1]);
 102   do_stat ("t-stt-stamp2",  &statinfo[2]);
 103   do_stat ("t-stt-stamp3",  &statinfo[3]);
 104
 105   /* Now use our access functions. */
 106   for (i = 0; i < NFILES; ++i)
 107     {
 108       modtimes[i] = get_stat_mtime (&statinfo[i]);
 109     }
 110 }
 111
 112 static void
 113 test_mtime (const struct stat *statinfo, struct timespec *modtimes)
 114 {
 115   int i;
 116
 117   /* Use the struct stat fields directly. */
 118   /* mtime(stamp1) < mtime(stamp2) */
 119   ASSERT (statinfo[0].st_mtime < statinfo[2].st_mtime
 120           || (statinfo[0].st_mtime == statinfo[2].st_mtime
 121               && (get_stat_mtime_ns (&statinfo[0])
 122                   < get_stat_mtime_ns (&statinfo[2]))));
 123   /* mtime(stamp2) < mtime(stamp3) */
 124   ASSERT (statinfo[2].st_mtime < statinfo[3].st_mtime
 125           || (statinfo[2].st_mtime == statinfo[3].st_mtime
 126               && (get_stat_mtime_ns (&statinfo[2])
 127                   < get_stat_mtime_ns (&statinfo[3]))));
 128
 129   /* Now check the result of the access functions. */
 130   /* mtime(stamp1) < mtime(stamp2) */
 131   ASSERT (modtimes[0].tv_sec < modtimes[2].tv_sec
 132           || (modtimes[0].tv_sec == modtimes[2].tv_sec
 133               && modtimes[0].tv_nsec < modtimes[2].tv_nsec));
 134   /* mtime(stamp2) < mtime(stamp3) */
 135   ASSERT (modtimes[2].tv_sec < modtimes[3].tv_sec
 136           || (modtimes[2].tv_sec == modtimes[3].tv_sec
 137               && modtimes[2].tv_nsec < modtimes[3].tv_nsec));
 138
 139   /* verify equivalence */
 140   for (i = 0; i < NFILES; ++i)
 141     {
 142       struct timespec ts;
 143       ts = get_stat_mtime (&statinfo[i]);
 144       ASSERT (ts.tv_sec == statinfo[i].st_mtime);
 145     }
 146 }
 147
 148 #if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
 149 /* Skip the ctime tests on native Windows platforms, because their
 150    st_ctime is either the same as st_mtime (plus or minus an offset)
 151    or set to the file _creation_ time, and is not influenced by rename
 152    or chmod.  */
 153 # define test_ctime(ignored) ((void) 0)
 154 #else
 155 static void
 156 test_ctime (const struct stat *statinfo)
 157 {
 158   /* On some buggy NFS clients, mtime and ctime are disproportionately
 159      skewed from one another.  Skip this test in that case.  */
 160   if (statinfo[0].st_mtime != statinfo[0].st_ctime)
 161     return;
 162
 163   /* mtime(stamp2) < ctime(renamed) */
 164   ASSERT (statinfo[2].st_mtime < statinfo[1].st_ctime
 165           || (statinfo[2].st_mtime == statinfo[1].st_ctime
 166               && (get_stat_mtime_ns (&statinfo[2])
 167                   < get_stat_ctime_ns (&statinfo[1]))));
 168 }
 169 #endif
 170
 171 static void
 172 test_birthtime (const struct stat *statinfo,
 173                 const struct timespec *modtimes,
 174                 struct timespec *birthtimes)
 175 {
 176   int i;
 177
 178   /* Collect the birth times.  */
 179   for (i = 0; i < NFILES; ++i)
 180     {
 181       birthtimes[i] = get_stat_birthtime (&statinfo[i]);
 182       if (birthtimes[i].tv_nsec < 0)
 183         return;
 184     }
 185
 186   /* mtime(stamp1) < birthtime(renamed) */
 187   ASSERT (modtimes[0].tv_sec < birthtimes[1].tv_sec
 188           || (modtimes[0].tv_sec == birthtimes[1].tv_sec
 189               && modtimes[0].tv_nsec < birthtimes[1].tv_nsec));
 190   /* birthtime(renamed) < mtime(stamp2) */
 191   ASSERT (birthtimes[1].tv_sec < modtimes[2].tv_sec
 192           || (birthtimes[1].tv_sec == modtimes[2].tv_sec
 193               && birthtimes[1].tv_nsec < modtimes[2].tv_nsec));
 194 }
 195
 196 int
 197 main (void)
 198 {
 199   struct stat statinfo[NFILES];
 200   struct timespec modtimes[NFILES];
 201   struct timespec birthtimes[NFILES];
 202
 203 #ifdef SIGHUP
 204   signal (SIGHUP, cleanup);
 205 #endif
 206 #ifdef SIGINT
 207   signal (SIGINT, cleanup);
 208 #endif
 209 #ifdef SIGQUIT
 210   signal (SIGQUIT, cleanup);
 211 #endif
 212 #ifdef SIGTERM
 213   signal (SIGTERM, cleanup);
 214 #endif
 215
 216   cleanup (0);
 217   prepare_test (statinfo, modtimes);
 218   test_mtime (statinfo, modtimes);
 219   test_ctime (statinfo);
 220   test_birthtime (statinfo, modtimes, birthtimes);
 221
 222   cleanup (0);
 223   return 0;
 224 }