#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdio.h>

#define BUFSIZE 512

main()
{

  char buffer[BUFSIZE];
  int  filedes;
  ssize_t nread;
  long total = 0;
	

  printf("Read BUFSIZ is %d \n", BUFSIZ);

  /* open the test file */
  if ((filedes = open("test.txt", O_RDONLY)) == -1)
   {
        printf("Couldn't open test.txt \n");
        exit(1); 
   }

  /* read in loop until EOF */
  while ( (nread = read(filedes, buffer, BUFSIZE)) > 0)
   {
	printf("Read %d bytes this time \n", nread);
	total += nread;
   }
	
	
  printf("Read %d bytes in total \n", total);
  exit(0); /* normal exit */

}