func: static int openfile(char *name, int flags)
  
  {
  
  	if (bs) {
  
  		fprintf(stderr, "file open already, try 'help close'\n");
  
  		return 1;
  
  	}
  
  
  
  	bs = bdrv_new("hda");
  
  	if (!bs)
  
  		return 1;
  
  
  
  	if (bdrv_open(bs, name, flags) == -1) {
  
  		fprintf(stderr, "%s: can't open device %s\n", progname, name);
  
  		bs = NULL;
  
  		return 1;
  
  	}
  
  
  
  	return 0;
  
  }
  