"io"

	xioutil "github.com/minio/minio/internal/ioutil"
)

// DrainBody close non nil response with any response Body.
// convenient wrapper to drain any remaining data on response body.
//
// Subsequently this allows golang http RoundTripper
// to reuse the same connection for future requests.
func DrainBody(respBody io.ReadCloser) {
	// Callers should close resp.Body when done reading from it.

	_, err = jd.file.Write(b)
	if err != nil {
		// Do not leak fd here, close the file properly.
		Fdatasync(jd.file)
		_ = jd.file.Close()

		jd.file = nil // reset to allow subsequent reopen when file/disk is available.
	}
	return err
}

// Close closes the active journal and renames it to read-only for pending
// deletes processing. Note: calling Close on a closed journal is a no-op.
func (jd *tierDiskJournal) Close() error {

// the upstream reader after close has been called.
type disconnectReader struct {
	r  io.Reader
	mu sync.Mutex
}

func (d *disconnectReader) Read(p []byte) (n int, err error) {
	d.mu.Lock()
	defer d.mu.Unlock()
	if d.r != nil {
		return d.r.Read(p)
	}
	return 0, errors.New("reader closed")
}

func (d *disconnectReader) Close() error {
	d.mu.Lock()
	d.r = nil

				if err != nil {
					break
				}
			}
			r.Close()
			if err != io.EOF {
				t.Fatalf("Reading failed with %s, %s", err, file.Name())
			}
		})

		t.Run(file.Name()+"-close", func(t *testing.T) {
			f, err := os.Open(filepath.Join("testdata", file.Name()))
			if err != nil {
				t.Fatal(err)
			}
			r := NewReader(f, &ReaderArgs{})
			r.Close()
			var record sql.Record
			for {

		}
	}
	return rsc.reader.Read(p)
}

// Close call to implement io.Closer. Calling Read/Seek after Close reopens the
// object for reading and a subsequent Close call is required to ensure
// resources are freed.
func (rsc *ObjectReadSeekCloser) Close() error {
	rsc.closerOnce.Do(func() {
		if rsc.reader != nil {
			rsc.closerErr = rsc.reader.Close()
			rsc.reader = nil
		}
	})
	return rsc.closerErr

	r.mutex.Lock()
	r.refs++
	r.mutex.Unlock()
}

// Close - this closer implements a special closer
// closes the underlying fd only when the refs
// reach zero.
func (r *RLockedFile) Close() (err error) {
	r.mutex.Lock()
	defer r.mutex.Unlock()

	if r.refs == 0 {
		return os.ErrInvalid
	}

	r.refs--
	if r.refs == 0 {
		err = r.File.Close()
	}

	return err
}

		return nil, err
	}

	if err = syscall.Flock(int(f.Fd()), lockType); err != nil {
		f.Close()
		if err == syscall.EWOULDBLOCK {
			err = ErrAlreadyLocked
		}
		return nil, err
	}

	st, err := os.Stat(path)
	if err != nil {
		f.Close()
		return nil, err
	}

	if st.IsDir() {
		f.Close()
		return nil, &os.PathError{
			Op:   "open",
			Path: path,
			Err:  syscall.EISDIR,
		}
	}

}

// Close - closes underneath connections to NATS server.
func (target *NATSTarget) Close() (err error) {
	close(target.quitCh)
	if target.stanConn != nil {
		// closing the streaming connection does not close the provided NATS connection.
		if target.stanConn.NatsConn() != nil {
			target.stanConn.NatsConn().Close()
		}
		return target.stanConn.Close()
	}

	if target.natsConn != nil {

	appendFile, err := lock.Open(dst, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0o666)
	if err != nil {
		return err
	}
	defer appendFile.Close()

	srcFile, err := lock.Open(src, os.O_RDONLY, 0o666)
	if err != nil {
		return err
	}
	defer srcFile.Close()
	_, err = io.Copy(appendFile, srcFile)
	return err

	}
	srv.listenerMutex.Unlock()

	if atomic.AddUint32(&srv.inShutdown, 1) > 1 {
		// shutdown in progress
		return http.ErrServerClosed
	}

	// Close underneath HTTP listener.
	srv.listenerMutex.Lock()
	err := srv.listener.Close()
	srv.listenerMutex.Unlock()
	if err != nil {
		return err
	}

	pollIntervalBase := time.Millisecond
	nextPollInterval := func() time.Duration {