libio/tst-atime.c

   1 #include <errno.h>
   2 #include <fcntl.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7 #include <sys/stat.h>
   8 #include <sys/statvfs.h>
   9
  10
  11 static int do_test (void);
  12 #define TEST_FUNCTION do_test ()
  13 #include <test-skeleton.c>
  14
  15
  16 static int
  17 do_test (void)
  18 {
  19   char *buf;
  20   int fd;
  21   FILE *fp;
  22   int ch;
  23   struct stat st1;
  24   struct stat st2;
  25
  26   buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-atime.XXXXXX");
  27   if (buf == NULL)
  28     {
  29       printf ("cannot allocate memory: %m\n");
  30       return 1;
  31     }
  32   stpcpy (stpcpy (buf, test_dir), "/tst-atime.XXXXXX");
  33
  34   fd = mkstemp (buf);
  35   if (fd == -1)
  36     {
  37       printf ("cannot open temporary file: %m\n");
  38       return 1;
  39     }
  40
  41 #ifdef ST_NOATIME
  42   /* Make sure the filesystem doesn't have the noatime option set.  If
  43      statvfs is not available just continue.  */
  44   struct statvfs sv;
  45   int e = fstatvfs (fd, &sv);
  46   if (e != ENOSYS)
  47     {
  48       if (e != 0)
  49         {
  50           printf ("cannot statvfs '%s': %m\n", buf);
  51           return 1;
  52         }
  53
  54       if ((sv.f_flag & ST_NOATIME) != 0)
  55         {
  56           puts ("Bah!  The filesystem is mounted with noatime");
  57           return 0;
  58         }
  59     }
  60 #endif
  61
  62   /* Make sure it gets removed.  */
  63   add_temp_file (buf);
  64
  65   if (write (fd, "some string\n", 12) != 12)
  66     {
  67       printf ("cannot write temporary file: %m\n");
  68       return 1;
  69     }
  70
  71   if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
  72     {
  73       printf ("cannot reposition temporary file: %m\n");
  74       return 1;
  75     }
  76
  77   fp = fdopen (fd, "r");
  78   if (fp == NULL)
  79     {
  80       printf ("cannot create stream: %m\n");
  81       return 1;
  82     }
  83
  84   if (fstat (fd, &st1) == -1)
  85     {
  86       printf ("first stat failed: %m\n");
  87       return 1;
  88     }
  89
  90   sleep (2);
  91
  92   ch = fgetc (fp);
  93   if (ch != 's')
  94     {
  95       printf ("did not read correct character: got '%c', expected 's'\n", ch);
  96       return 1;
  97     }
  98
  99   if (fstat (fd, &st2) == -1)
 100     {
 101       printf ("second stat failed: %m\n");
 102       return 1;
 103     }
 104
 105   if (st1.st_atime > st2.st_atime)
 106     {
 107       puts ("second atime smaller");
 108       return 1;
 109     }
 110   else if (st1.st_atime == st2.st_atime)
 111     {
 112       puts ("atime has not changed");
 113       return 1;
 114     }
 115
 116   fclose (fp);
 117
 118   return 0;
 119 }