Documentation
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Index ¶
- func ApplyLayer(dest string, layer io.Reader) (size int64, err error)
- func ApplyUncompressedLayer(dest string, layer io.Reader, options *archive.TarOptions) (int64, error)
- func NewArchiver(idMapping idtools.IdentityMapping) *archive.Archiver
- func Tar(srcPath string, options *archive.TarOptions, root string) (io.ReadCloser, error)
- func Untar(tarArchive io.Reader, dest string, options *archive.TarOptions) error
- func UntarUncompressed(tarArchive io.Reader, dest string, options *archive.TarOptions) error
- func UntarWithRoot(tarArchive io.Reader, dest string, options *archive.TarOptions, root string) error
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func ApplyLayer ¶
ApplyLayer parses a diff in the standard layer format from `layer`, and applies it to the directory `dest`. The stream `layer` can only be uncompressed. Returns the size in bytes of the contents of the layer.
func ApplyUncompressedLayer ¶
func ApplyUncompressedLayer(dest string, layer io.Reader, options *archive.TarOptions) (int64, error)
ApplyUncompressedLayer parses a diff in the standard layer format from `layer`, and applies it to the directory `dest`. The stream `layer` can only be uncompressed. Returns the size in bytes of the contents of the layer.
func NewArchiver ¶
func NewArchiver(idMapping idtools.IdentityMapping) *archive.Archiver
NewArchiver returns a new Archiver which uses chrootarchive.Untar
func Tar ¶
func Tar(srcPath string, options *archive.TarOptions, root string) (io.ReadCloser, error)
Tar tars the requested path while chrooted to the specified root.
func Untar ¶
Untar reads a stream of bytes from `archive`, parses it as a tar archive, and unpacks it into the directory at `dest`. The archive may be compressed with one of the following algorithms: identity (uncompressed), gzip, bzip2, xz.
func UntarUncompressed ¶
UntarUncompressed reads a stream of bytes from `archive`, parses it as a tar archive, and unpacks it into the directory at `dest`. The archive must be an uncompressed stream.
func UntarWithRoot ¶
func UntarWithRoot(tarArchive io.Reader, dest string, options *archive.TarOptions, root string) error
UntarWithRoot is the same as `Untar`, but allows you to pass in a root directory The root directory is the directory that will be chrooted to. `dest` must be a path within `root`, if it is not an error will be returned.
`root` should set to a directory which is not controlled by any potentially malicious process.
This should be used to prevent a potential attacker from manipulating `dest` such that it would provide access to files outside of `dest` through things like symlinks. Normally `ResolveSymlinksInScope` would handle this, however sanitizing symlinks in this manner is inherrently racey: ref: CVE-2018-15664
Types ¶
This section is empty.
Source Files