package tar

import "github.com/coreos/rkt/pkg/tar"

Package tar contains helper functions for working with tar files

Index ¶

• Constants
• Variables
• func ExtractTar(rs io.Reader, dir string, overwrite bool, uidRange *user.UidRange, pwl PathWhitelistMap) error
• func ExtractTarInsecure(tr *tar.Reader, target string, overwrite bool, pwl PathWhitelistMap, editor FilePermissionsEditor) error
• func HdrToTimespec(hdr *tar.Header) []syscall.Timespec
• type FilePermissionsEditor
• func NewUidShiftingFilePermEditor(uidRange *user.UidRange) (FilePermissionsEditor, error)
• type PathWhitelistMap

Constants ¶

const DEFAULT_DIR_MODE os.FileMode = 0755

Variables ¶

var ErrNotSupportedPlatform = errors.New("platform and architecture is not supported")

Functions ¶

func ExtractTar ¶

func ExtractTar(rs io.Reader, dir string, overwrite bool, uidRange *user.UidRange, pwl PathWhitelistMap) error

ExtractTar extracts a tarball (from a io.Reader) into the given directory if pwl is not nil, only the paths in the map are extracted. If overwrite is true, existing files will be overwritten. The extraction is executed by fork/exec()ing a new process. The new process needs the CAP_SYS_CHROOT capability.

func ExtractTarInsecure ¶

func ExtractTarInsecure(tr *tar.Reader, target string, overwrite bool, pwl PathWhitelistMap, editor FilePermissionsEditor) error

ExtractTarInsecure extracts a tarball (from a tar.Reader) into the target directory. If pwl is not nil, only the paths in the map are extracted. If overwrite is true, existing files will be overwritten.

func HdrToTimespec ¶

func HdrToTimespec(hdr *tar.Header) []syscall.Timespec

Types ¶

type FilePermissionsEditor ¶

type FilePermissionsEditor func(path string, uid, gid int, typ byte, _ os.FileInfo, xattr map[string]string) error

func NewUidShiftingFilePermEditor ¶

func NewUidShiftingFilePermEditor(uidRange *user.UidRange) (FilePermissionsEditor, error)

type PathWhitelistMap ¶

type PathWhitelistMap map[string]struct{}

Map of paths that should be whitelisted. The paths should be relative to the root of the tar file and should be cleaned (for example using filepath.Clean)

Source Files ¶

chroot.go tar.go