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 #define TIMEOUT 5
  14 #include <test-skeleton.c>
  15
  16
  17 static int
  18 do_test (void)
  19 {
  20   char *buf;
  21   int fd;
  22   FILE *fp;
  23   int ch;
  24   struct stat st1;
  25   struct stat st2;
  26
  27   buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-atime.XXXXXX");
  28   if (buf == NULL)
  29     {
  30       printf ("cannot allocate memory: %m\n");
  31       return 1;
  32     }
  33   stpcpy (stpcpy (buf, test_dir), "/tst-atime.XXXXXX");
  34
  35   fd = mkstemp (buf);
  36   if (fd == -1)
  37     {
  38       printf ("cannot open temporary file: %m\n");
  39       return 1;
  40     }
  41
  42 #ifdef ST_NOATIME
  43   /* Make sure the filesystem doesn't have the noatime option set.  If
  44      statvfs is not available just continue.  */
  45   struct statvfs sv;
  46   int e = fstatvfs (fd, &sv);
  47   if (e != ENOSYS)
  48     {
  49       if (e != 0)
  50         {
  51           printf ("cannot statvfs '%s': %m\n", buf);
  52           return 1;
  53         }
  54
  55       if ((sv.f_flag & ST_NOATIME) != 0)
  56         {
  57           puts ("Bah!  The filesystem is mounted with noatime");
  58           return 0;
  59         }
  60     }
  61 #endif
  62
  63   /* Make sure it gets removed.  */
  64   add_temp_file (buf);
  65
  66   if (write (fd, "some string\n", 12) != 12)
  67     {
  68       printf ("cannot write temporary file: %m\n");
  69       return 1;
  70     }
  71
  72   if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
  73     {
  74       printf ("cannot reposition temporary file: %m\n");
  75       return 1;
  76     }
  77
  78   fp = fdopen (fd, "r");
  79   if (fp == NULL)
  80     {
  81       printf ("cannot create stream: %m\n");
  82       return 1;
  83     }
  84
  85   if (fstat (fd, &st1) == -1)
  86     {
  87       printf ("first stat failed: %m\n");
  88       return 1;
  89     }
  90
  91   sleep (2);
  92
  93   ch = fgetc (fp);
  94   if (ch != 's')
  95     {
  96       printf ("did not read correct character: got '%c', expected 's'\n", ch);
  97       return 1;
  98     }
  99
 100   if (fstat (fd, &st2) == -1)
 101     {
 102       printf ("second stat failed: %m\n");
 103       return 1;
 104     }
 105
 106   if (st1.st_atime > st2.st_atime)
 107     {
 108       puts ("second atime smaller");
 109       return 1;
 110     }
 111   else if (st1.st_atime == st2.st_atime)
 112     {
 113       puts ("atime has not changed");
 114       return 1;
 115     }
 116
 117   fclose (fp);
 118
 119   return 0;
 120 }