public DF(File path,
    Configuration conf) throws IOException 
{
  
    this(path, conf.getLong("dfs.df.interval", DF.DF_INTERVAL_DEFAULT));
}

 public DF(File path,
    long dfInterval) throws IOException 
{
    this.dirPath = path.getCanonicalPath();
    this.dfInterval = dfInterval;
    lastDF = (dfInterval <  0) ? 0 : -dfInterval;
    this.doDF();
}

 public long getAvailable() throws IOException 
{
 
    doDF(); 
    return available;
}

 public long getAvailableSkipRefresh() 
{
 
    return available;
}

 public long getCapacity() throws IOException 
{
 
    doDF(); 
    return capacity;
}

 public long getCapacitySkipRefresh() 
{
 
    return capacity;
}

 public String getDirPath() 
{
    return dirPath;
}

 public String getFilesystem() throws IOException 
{
 
    doDF(); 
    return filesystem;
}

 public String getMount() throws IOException 
{
    doDF();
    return mount;
}

 public int getPercentUsed() throws IOException 
{
    doDF();
    return percentUsed;
}

 public int getPercentUsedSkipRefresh() 
{
    return percentUsed;
}

 public long getUsed() throws IOException 
{
 
    doDF(); 
    return used;
}

 public long getUsedSkipRefresh() 
{
 
    return used;
}

 public static  void main(String[] args) throws Exception 
{
    String path = ".";
    if (args.length  > 0)
      path = args[0];
    System.out.println(new DF(new File(path), DF_INTERVAL_DEFAULT).toString());
}

 public String toString() 
{
    return
      "df -k " + mount +"\n" +
      filesystem + "\t" +
      capacity / 1024 + "\t" +
      used / 1024 + "\t" +
      available / 1024 + "\t" +
      percentUsed + "%\t" +
      mount;
}