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   struct statvfs sv;
  27   int e;
  28
  29   buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-atime.XXXXXX");
  30   if (buf == NULL)
  31     {
  32       printf ("cannot allocate memory: %m\n");
  33       return 1;
  34     }
  35   stpcpy (stpcpy (buf, test_dir), "/tst-atime.XXXXXX");
  36
  37   fd = mkstemp (buf);
  38   if (fd == -1)
  39     {
  40       printf ("cannot open temporary file: %m\n");
  41       return 1;
  42     }
  43
  44 #ifdef ST_NOATIME
  45   /* Make sure the filesystem doesn't have the noatime option set.  If
  46      statvfs is not available just continue.  */
  47   e = fstatvfs (fd, &sv);
  48   if (e != ENOSYS)
  49     {
  50       if (e != 0)
  51         {
  52           printf ("cannot statvfs '%s': %m\n", buf);
  53           return 1;
  54         }
  55
  56       if ((sv.f_flag & ST_NOATIME) != 0)
  57         {
  58           puts ("Bah!  The filesystem is mounted with noatime");
  59           return 0;
  60         }
  61     }
  62 #endif
  63
  64   /* Make sure it gets removed.  */
  65   add_temp_file (buf);
  66
  67   if (write (fd, "some string\n", 12) != 12)
  68     {
  69       printf ("cannot write temporary file: %m\n");
  70       return 1;
  71     }
  72
  73   if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
  74     {
  75       printf ("cannot reposition temporary file: %m\n");
  76       return 1;
  77     }
  78
  79   fp = fdopen (fd, "r");
  80   if (fp == NULL)
  81     {
  82       printf ("cannot create stream: %m\n");
  83       return 1;
  84     }
  85
  86   if (fstat (fd, &st1) == -1)
  87     {
  88       printf ("first stat failed: %m\n");
  89       return 1;
  90     }
  91
  92   sleep (2);
  93
  94   ch = fgetc (fp);
  95   if (ch != 's')
  96     {
  97       printf ("did not read correct character: got '%c', expected 's'\n", ch);
  98       return 1;
  99     }
 100
 101   if (fstat (fd, &st2) == -1)
 102     {
 103       printf ("second stat failed: %m\n");
 104       return 1;
 105     }
 106
 107   if (st1.st_atime > st2.st_atime)
 108     {
 109       puts ("second atime smaller");
 110       return 1;
 111     }
 112   else if (st1.st_atime == st2.st_atime)
 113     {
 114       puts ("atime has not changed");
 115       return 1;
 116     }
 117
 118   fclose (fp);
 119
 120   return 0;
 121 }