io/test-utime.c

   1 /* Copyright (C) 1994-2013 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <fcntl.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <sys/stat.h>
  22 #include <unistd.h>
  23 #include <utime.h>
  24 #include <time.h>
  25
  26 int
  27 main (int argc, char *argv[])
  28 {
  29   char file[L_tmpnam];
  30   struct utimbuf ut;
  31   struct stat st;
  32   struct stat stnow;
  33   time_t now1, now2;
  34   int fd;
  35
  36   if (tmpnam (file) == 0)
  37     {
  38       perror ("tmpnam");
  39       return 1;
  40     }
  41
  42   fd = creat (file, 0666);
  43   if (fd < 0)
  44     {
  45       perror ("creat");
  46       return 1;
  47     }
  48   close (fd);
  49
  50   /* Test utime with arg */
  51   ut.actime = 500000000;
  52   ut.modtime = 500000001;
  53   if (utime (file, &ut))
  54     {
  55       perror ("utime");
  56       remove (file);
  57       return 1;
  58     }
  59
  60   if (stat (file, &st))
  61     {
  62       perror ("stat");
  63       remove (file);
  64       return 1;
  65     }
  66
  67   /* Test utime with NULL.
  68      Since there's a race condition possible here, we check
  69      the time before and after the call to utime.  */
  70   now1 = time (NULL);
  71   if (now1 == (time_t)-1)
  72     {
  73       perror ("time");
  74       remove (file);
  75       return 1;
  76     }
  77
  78   /* The clocks used to set the modification time and that used in the
  79      time() call need not be the same.  They need not have the same
  80      precision.  Therefore we delay the following operation by one
  81      second which makes sure we can compare with second precision.  */
  82   sleep (1);
  83
  84   if (utime (file, NULL))
  85     {
  86       perror ("utime NULL");
  87       remove (file);
  88       return 1;
  89     }
  90
  91   sleep (1);
  92
  93   now2 = time (NULL);
  94   if (now2 == (time_t)-1)
  95     {
  96       perror ("time");
  97       remove (file);
  98       return 1;
  99     }
 100
 101   if (stat (file, &stnow))
 102     {
 103       perror ("stat");
 104       remove (file);
 105       return 1;
 106     }
 107
 108   remove (file);
 109
 110   if (st.st_mtime != ut.modtime)
 111     {
 112       printf ("modtime %ld != %ld\n", st.st_mtime, ut.modtime);
 113       return 1;
 114     }
 115
 116   if (st.st_atime != ut.actime)
 117     {
 118       printf ("actime %ld != %ld\n", st.st_atime, ut.actime);
 119       return 1;
 120     }
 121
 122   if (stnow.st_mtime < now1 || stnow.st_mtime > now2)
 123     {
 124       printf ("modtime %ld <%ld >%ld\n", stnow.st_mtime, now1, now2);
 125       return 1;
 126     }
 127
 128   if (stnow.st_atime < now1 || stnow.st_atime > now2)
 129     {
 130       printf ("actime %ld <%ld >%ld\n", stnow.st_atime, now1, now2);
 131       return 1;
 132     }
 133
 134   puts ("Test succeeded.");
 135   return 0;
 136 }