Example #1
0
// containerStatPath stats the filesystem resource at the specified path in this
// container. Returns stat info about the resource.
func (daemon *Daemon) containerStatPath(container *container.Container, path string) (stat *types.ContainerPathStat, err error) {
	container.Lock()
	defer container.Unlock()

	if err = daemon.Mount(container); err != nil {
		return nil, err
	}
	defer daemon.Unmount(container)

	err = daemon.mountVolumes(container)
	defer container.UnmountVolumes(true, daemon.LogVolumeEvent)
	if err != nil {
		return nil, err
	}

	resolvedPath, absPath, err := container.ResolvePath(path)
	if err != nil {
		return nil, err
	}

	return container.StatPath(resolvedPath, absPath)
}
Example #2
0
// containerArchivePath creates an archive of the filesystem resource at the specified
// path in this container. Returns a tar archive of the resource and stat info
// about the resource.
func (daemon *Daemon) containerArchivePath(container *container.Container, path string) (content io.ReadCloser, stat *types.ContainerPathStat, err error) {
	container.Lock()

	defer func() {
		if err != nil {
			// Wait to unlock the container until the archive is fully read
			// (see the ReadCloseWrapper func below) or if there is an error
			// before that occurs.
			container.Unlock()
		}
	}()

	if err = daemon.Mount(container); err != nil {
		return nil, nil, err
	}

	defer func() {
		if err != nil {
			// unmount any volumes
			container.UnmountVolumes(true, daemon.LogVolumeEvent)
			// unmount the container's rootfs
			daemon.Unmount(container)
		}
	}()

	if err = daemon.mountVolumes(container); err != nil {
		return nil, nil, err
	}

	resolvedPath, absPath, err := container.ResolvePath(path)
	if err != nil {
		return nil, nil, err
	}

	stat, err = container.StatPath(resolvedPath, absPath)
	if err != nil {
		return nil, nil, err
	}

	// We need to rebase the archive entries if the last element of the
	// resolved path was a symlink that was evaluated and is now different
	// than the requested path. For example, if the given path was "/foo/bar/",
	// but it resolved to "/var/lib/docker/containers/{id}/foo/baz/", we want
	// to ensure that the archive entries start with "bar" and not "baz". This
	// also catches the case when the root directory of the container is
	// requested: we want the archive entries to start with "/" and not the
	// container ID.
	data, err := archive.TarResourceRebase(resolvedPath, filepath.Base(absPath))
	if err != nil {
		return nil, nil, err
	}

	content = ioutils.NewReadCloserWrapper(data, func() error {
		err := data.Close()
		container.UnmountVolumes(true, daemon.LogVolumeEvent)
		daemon.Unmount(container)
		container.Unlock()
		return err
	})

	daemon.LogContainerEvent(container, "archive-path")

	return content, stat, nil
}