io/test-utime.c

   1 /* Copyright (C) 1994-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <fcntl.h>
  19 #include <stdint.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <sys/stat.h>
  23 #include <unistd.h>
  24 #include <utime.h>
  25 #include <time.h>
  26
  27 int
  28 main (int argc, char *argv[])
  29 {
  30   char file[] = "/tmp/test-utime.XXXXXX";
  31   struct utimbuf ut;
  32   struct stat st;
  33   struct stat stnow;
  34   time_t now1, now2;
  35   int fd;
  36
  37   fd = mkstemp (file);
  38   if (fd < 0)
  39     {
  40       perror ("mkstemp");
  41       return 1;
  42     }
  43   close (fd);
  44
  45   /* Test utime with arg */
  46   ut.actime = 500000000;
  47   ut.modtime = 500000001;
  48   if (utime (file, &ut))
  49     {
  50       perror ("utime");
  51       remove (file);
  52       return 1;
  53     }
  54
  55   if (stat (file, &st))
  56     {
  57       perror ("stat");
  58       remove (file);
  59       return 1;
  60     }
  61
  62   /* Test utime with NULL.
  63      Since there's a race condition possible here, we check
  64      the time before and after the call to utime.  */
  65   now1 = time (NULL);
  66   if (now1 == (time_t)-1)
  67     {
  68       perror ("time");
  69       remove (file);
  70       return 1;
  71     }
  72
  73   /* The clocks used to set the modification time and that used in the
  74      time() call need not be the same.  They need not have the same
  75      precision.  Therefore we delay the following operation by one
  76      second which makes sure we can compare with second precision.  */
  77   sleep (1);
  78
  79   if (utime (file, NULL))
  80     {
  81       perror ("utime NULL");
  82       remove (file);
  83       return 1;
  84     }
  85
  86   sleep (1);
  87
  88   now2 = time (NULL);
  89   if (now2 == (time_t)-1)
  90     {
  91       perror ("time");
  92       remove (file);
  93       return 1;
  94     }
  95
  96   if (stat (file, &stnow))
  97     {
  98       perror ("stat");
  99       remove (file);
 100       return 1;
 101     }
 102
 103   remove (file);
 104
 105   if (st.st_mtime != ut.modtime)
 106     {
 107       printf ("modtime %jd != %jd\n",
 108               (intmax_t) st.st_mtime, (intmax_t) ut.modtime);
 109       return 1;
 110     }
 111
 112   if (st.st_atime != ut.actime)
 113     {
 114       printf ("actime %jd != %jd\n",
 115               (intmax_t) st.st_atime, (intmax_t) ut.actime);
 116       return 1;
 117     }
 118
 119   if (stnow.st_mtime < now1 || stnow.st_mtime > now2)
 120     {
 121       printf ("modtime %jd <%jd >%jd\n",
 122               (intmax_t) stnow.st_mtime, (intmax_t) now1, (intmax_t) now2);
 123       return 1;
 124     }
 125
 126   if (stnow.st_atime < now1 || stnow.st_atime > now2)
 127     {
 128       printf ("actime %jd <%jd >%jd\n",
 129               (intmax_t) stnow.st_atime, (intmax_t) now1, (intmax_t) now2);
 130       return 1;
 131     }
 132
 133   puts ("Test succeeded.");
 134   return 0;
 135 }