// applyLayerHandler parses a diff in the standard layer format from `layer`, and // applies it to the directory `dest`. Returns the size in bytes of the // contents of the layer. func applyLayerHandler(dest string, layer archive.Reader, decompress bool) (size int64, err error) { dest = filepath.Clean(dest) // Ensure it is a Windows-style volume path dest = longpath.AddPrefix(dest) if decompress { decompressed, err := archive.DecompressStream(layer) if err != nil { return 0, err } defer decompressed.Close() layer = decompressed } tmpDir, err := ioutil.TempDir(os.Getenv("temp"), "temp-docker-extract") if err != nil { return 0, fmt.Errorf("ApplyLayer failed to create temp-docker-extract under %s. %s", dest, err) } s, err := archive.UnpackLayer(dest, layer) os.RemoveAll(tmpDir) if err != nil { return 0, fmt.Errorf("ApplyLayer %s failed UnpackLayer to %s", err, dest) } return s, nil }
func applyLayer() { runtime.LockOSThread() flag.Parse() if err := chroot(flag.Arg(0)); err != nil { fatal(err) } // We need to be able to set any perms oldmask := syscall.Umask(0) defer syscall.Umask(oldmask) tmpDir, err := ioutil.TempDir("/", "temp-docker-extract") if err != nil { fatal(err) } os.Setenv("TMPDIR", tmpDir) size, err := archive.UnpackLayer("/", os.Stdin) os.RemoveAll(tmpDir) if err != nil { fatal(err) } encoder := json.NewEncoder(os.Stdout) if err := encoder.Encode(applyLayerResponse{size}); err != nil { fatal(fmt.Errorf("unable to encode layerSize JSON: %s", err)) } flush(os.Stdout) flush(os.Stdin) os.Exit(0) }
// applyLayer is the entry-point for docker-applylayer on re-exec. This is not // used on Windows as it does not support chroot, hence no point sandboxing // through chroot and rexec. func applyLayer() { var ( tmpDir string err error options *archive.TarOptions ) runtime.LockOSThread() flag.Parse() inUserns := rsystem.RunningInUserNS() if err := chroot(flag.Arg(0)); err != nil { fatal(err) } // We need to be able to set any perms oldmask, err := system.Umask(0) defer system.Umask(oldmask) if err != nil { fatal(err) } if err := json.Unmarshal([]byte(os.Getenv("OPT")), &options); err != nil { fatal(err) } if inUserns { options.InUserNS = true } if tmpDir, err = ioutil.TempDir("/", "temp-docker-extract"); err != nil { fatal(err) } os.Setenv("TMPDIR", tmpDir) size, err := archive.UnpackLayer("/", os.Stdin, options) os.RemoveAll(tmpDir) if err != nil { fatal(err) } encoder := json.NewEncoder(os.Stdout) if err := encoder.Encode(applyLayerResponse{size}); err != nil { fatal(fmt.Errorf("unable to encode layerSize JSON: %s", err)) } if _, err := flush(os.Stdin); err != nil { fatal(err) } os.Exit(0) }
func applyLayer() { var ( root = "/" tmpDir = "" err error ) runtime.LockOSThread() flag.Parse() if runtime.GOOS != "windows" { if err := chroot(flag.Arg(0)); err != nil { fatal(err) } // We need to be able to set any perms oldmask, err := system.Umask(0) defer system.Umask(oldmask) if err != nil { fatal(err) } } else { // As Windows does not support chroot or umask, we use the directory // passed in which will be <pathto>\docker-buildnnnnnnnn instead of // the 'chroot-root', "/" root = flag.Arg(0) } if tmpDir, err = ioutil.TempDir(root, "temp-docker-extract"); err != nil { fatal(err) } os.Setenv("TMPDIR", tmpDir) size, err := archive.UnpackLayer(root, os.Stdin) os.RemoveAll(tmpDir) if err != nil { fatal(err) } encoder := json.NewEncoder(os.Stdout) if err := encoder.Encode(applyLayerResponse{size}); err != nil { fatal(fmt.Errorf("unable to encode layerSize JSON: %s", err)) } flush(os.Stdout) flush(os.Stdin) os.Exit(0) }
func ApplyLayer(dest string, layer archive.ArchiveReader) (size int64, err error) { dest = filepath.Clean(dest) decompressed, err := archive.DecompressStream(layer) if err != nil { return 0, err } defer decompressed.Close() tmpDir, err := ioutil.TempDir(os.Getenv("temp"), "temp-docker-extract") if err != nil { return 0, fmt.Errorf("ApplyLayer failed to create temp-docker-extract under %s. %s", dest, err) } s, err := archive.UnpackLayer(dest, decompressed) os.RemoveAll(tmpDir) if err != nil { return 0, fmt.Errorf("ApplyLayer %s failed UnpackLayer to %s", err, dest) } return s, nil }