fprintf/fscanf bug code

#include <cyg/infra/diag.h>
#include <cyg/hal/hal_diag.h>
#include <cyg/hal/at91sam9_common_reg.h>
#include <cyg/hal/hal_io.h>
#include <cyg/io/spi_at91.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/kernel/kapi.h>
#include <cyg/hal/hal_cache.h>
#include <cyg/hal/at91sam9_io.h>
#include <assert.h>
#include <math.h>


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>


#define STACKSIZE    (CYGNUM_HAL_STACK_SIZE_MINIMUM + 32*1024)

static unsigned char cs_test_stack[STACKSIZE];
static cyg_handle_t cs_test_handle;
static cyg_thread   cs_test_thread;


static void cs_test_thread_func(cyg_addrword_t data);


void start_cs_test()
{
  cyg_thread_create(12, &cs_test_thread_func, 0, "CS Test Thread",
                    cs_test_stack, STACKSIZE,
                    &cs_test_handle, &cs_test_thread);
  cyg_thread_resume(cs_test_handle);


}

static void
cs_test_thread_func(cyg_addrword_t data)
{
  int servSock, clntSock;
  struct sockaddr_in serv_addr;
  FILE *term;
  int num;

  init_all_network_interfaces();
  servSock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
  assert(servSock > 0);

  bzero((char *) &serv_addr, sizeof(serv_addr));

  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr=htonl(INADDR_ANY); //listen on every interface
  serv_addr.sin_port = htons(23); //we listen on port 23

  /* Bind to the local address */
  if (bind(servSock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
    {
      diag_printf("Could not bind to local adress\n");
      assert(false);
    }

  if (listen(servSock, 1) < 0)
    {
        diag_printf("listen() failed");
    assert(false);
    }
  while(1)
    {

     /* Wait for a client to connect */
      if ((clntSock = accept(servSock, 0,0)) < 0)
    {
    diag_printf("accept() failed");
    assert(false);
    }

      term=fdopen(clntSock, "r+");
      assert(term!=0);

      while(1)
    {
      fprintf(term, "Type a number\n");
      diag_printf("fscanf %d\n", fscanf(term, "%d",&num));
      diag_printf("fprintf1 %d\n",fprintf(term, "Number was %d\n",num));
      diag_printf("fprintf2 %d\n",fprintf(term, "Again - Number was %d\n",num));

    }
    }



}


void cyg_user_start(void);
void cyg_user_start(void)
{
  start_cs_test();
}