package container
 
 import (
 	"os"
 	"path/filepath"
 
 	"github.com/docker/docker/pkg/archive"

 	"github.com/docker/engine-api/types"

 )
 
 // ResolvePath resolves the given path in the container to a resource on the
 // host. Returns a resolved path (absolute path to the resource on the host),
 // the absolute path to the resource relative to the container's rootfs, and
 // a error if the path points to outside the container's rootfs.
 func (container *Container) ResolvePath(path string) (resolvedPath, absPath string, err error) {
 	// Consider the given path as an absolute path in the container.
 	absPath = archive.PreserveTrailingDotOrSeparator(filepath.Join(string(filepath.Separator), path), path)
 
 	// Split the absPath into its Directory and Base components. We will
 	// resolve the dir in the scope of the container then append the base.
 	dirPath, basePath := filepath.Split(absPath)
 
 	resolvedDirPath, err := container.GetResourcePath(dirPath)
 	if err != nil {
 		return "", "", err
 	}
 
 	// resolvedDirPath will have been cleaned (no trailing path separators) so
 	// we can manually join it with the base path element.
 	resolvedPath = resolvedDirPath + string(filepath.Separator) + basePath
 
 	return resolvedPath, absPath, nil
 }
 
 // StatPath is the unexported version of StatPath. Locks and mounts should
 // be acquired before calling this method and the given path should be fully
 // resolved to a path on the host corresponding to the given absolute path
 // inside the container.
 func (container *Container) StatPath(resolvedPath, absPath string) (stat *types.ContainerPathStat, err error) {
 	lstat, err := os.Lstat(resolvedPath)
 	if err != nil {
 		return nil, err
 	}
 
 	var linkTarget string
 	if lstat.Mode()&os.ModeSymlink != 0 {
 		// Fully evaluate the symlink in the scope of the container rootfs.
 		hostPath, err := container.GetResourcePath(absPath)
 		if err != nil {
 			return nil, err
 		}
 
 		linkTarget, err = filepath.Rel(container.BaseFS, hostPath)
 		if err != nil {
 			return nil, err
 		}
 
 		// Make it an absolute path.
 		linkTarget = filepath.Join(string(filepath.Separator), linkTarget)
 	}
 
 	return &types.ContainerPathStat{
 		Name:       filepath.Base(absPath),
 		Size:       lstat.Size(),
 		Mode:       lstat.Mode(),
 		Mtime:      lstat.ModTime(),
 		LinkTarget: linkTarget,
 	}, nil
 }