libio/tst-eof.c

   1 #include <fcntl.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5
   6
   7 static void do_prepare (void);
   8 #define PREPARE(argc, argv) do_prepare ()
   9 static int do_test (void);
  10 #define TEST_FUNCTION do_test ()
  11 #include <test-skeleton.c>
  12
  13
  14 int fd;
  15
  16
  17 static void
  18 do_prepare (void)
  19 {
  20   fd = create_temp_file ("tst-eof.", NULL);
  21   if (fd == -1)
  22     {
  23       printf ("cannot create temporary file: %m\n");
  24       exit (1);
  25     }
  26 }
  27
  28
  29 static int
  30 do_test (void)
  31 {
  32   char buf[40];
  33   FILE *fp;
  34
  35   if (write (fd, "some string\n", 12) != 12)
  36     {
  37       printf ("cannot write temporary file: %m\n");
  38       return 1;
  39     }
  40
  41   if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
  42     {
  43       printf ("cannot reposition temporary file: %m\n");
  44       return 1;
  45     }
  46
  47   fp = fdopen (fd, "r");
  48   if (fp == NULL)
  49     {
  50       printf ("cannot create stream: %m\n");
  51       return 1;
  52     }
  53
  54   if (feof (fp))
  55     {
  56       puts ("EOF set after fdopen");
  57       return 1;
  58     }
  59
  60   if (fread (buf, 1, 20, fp) != 12)
  61     {
  62       puts ("didn't read the correct number of bytes");
  63       return 1;
  64     }
  65
  66   if (! feof (fp))
  67     {
  68       puts ("EOF not set after fread");
  69       return 1;
  70     }
  71
  72   fclose (fp);
  73
  74   return 0;
  75 }