#include <stdio.h>

#include <unistd.h>

#include <string.h>

int stdio_block_read = 1, stdio_block_write = 1;

int

main (int argc, char *argv[])

{

  FILE *f;

  int i;

  char buffer[31];

  const char filename[] = OBJPFX "bug4.test";

  while ((i = getopt (argc, argv, "rw")) != -1)

    switch (i)

      {

      case 'r':

	stdio_block_read = 0;

	break;

      case 'w':

	stdio_block_write = 0;

	break;

      }

  f = fopen (filename, "w+");

  for (i = 0; i < 9000; ++i)

    putc('x', f);

  fseek (f, 8180L, 0);

  fwrite ("Where does this text come from?", 1, 31, f);

  fseek (f, 8180L, 0);

  fread (buffer, 1, 31, f);

  fwrite (buffer, 1, 31, stdout);

  fclose (f);

  remove (filename);

  if (!memcmp (buffer, "Where does this text come from?", 31))

    {

      puts ("\nTest succeeded.");

      return 0;

    }

  else

    {

      puts ("\nTest FAILED!");

      return 1;

    }

}