mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
e554ab5589
also renamed the non-windows variant of this file to be consistent with other files in this package Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
413 lines
11 KiB
Go
413 lines
11 KiB
Go
package chrootarchive // import "github.com/docker/docker/pkg/chrootarchive"
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"hash/crc32"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
"runtime"
|
|
"strings"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/docker/docker/pkg/archive"
|
|
"github.com/docker/docker/pkg/reexec"
|
|
"github.com/docker/docker/pkg/system"
|
|
"gotest.tools/skip"
|
|
)
|
|
|
|
func init() {
|
|
reexec.Init()
|
|
}
|
|
|
|
var chrootArchiver = NewArchiver(nil)
|
|
|
|
func TarUntar(src, dst string) error {
|
|
return chrootArchiver.TarUntar(src, dst)
|
|
}
|
|
|
|
func CopyFileWithTar(src, dst string) (err error) {
|
|
return chrootArchiver.CopyFileWithTar(src, dst)
|
|
}
|
|
|
|
func UntarPath(src, dst string) error {
|
|
return chrootArchiver.UntarPath(src, dst)
|
|
}
|
|
|
|
func CopyWithTar(src, dst string) error {
|
|
return chrootArchiver.CopyWithTar(src, dst)
|
|
}
|
|
|
|
func TestChrootTarUntar(t *testing.T) {
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootTarUntar")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
src := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(src, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := ioutil.WriteFile(filepath.Join(src, "toto"), []byte("hello toto"), 0644); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := ioutil.WriteFile(filepath.Join(src, "lolo"), []byte("hello lolo"), 0644); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
stream, err := archive.Tar(src, archive.Uncompressed)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
dest := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(dest, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := Untar(stream, dest, &archive.TarOptions{ExcludePatterns: []string{"lolo"}}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// gh#10426: Verify the fix for having a huge excludes list (like on `docker load` with large # of
|
|
// local images)
|
|
func TestChrootUntarWithHugeExcludesList(t *testing.T) {
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootUntarHugeExcludes")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
src := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(src, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := ioutil.WriteFile(filepath.Join(src, "toto"), []byte("hello toto"), 0644); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
stream, err := archive.Tar(src, archive.Uncompressed)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
if err := system.MkdirAll(dest, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
options := &archive.TarOptions{}
|
|
//65534 entries of 64-byte strings ~= 4MB of environment space which should overflow
|
|
//on most systems when passed via environment or command line arguments
|
|
excludes := make([]string, 65534)
|
|
for i := 0; i < 65534; i++ {
|
|
excludes[i] = strings.Repeat(string(i), 64)
|
|
}
|
|
options.ExcludePatterns = excludes
|
|
if err := Untar(stream, dest, options); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestChrootUntarEmptyArchive(t *testing.T) {
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootUntarEmptyArchive")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
if err := Untar(nil, tmpdir, nil); err == nil {
|
|
t.Fatal("expected error on empty archive")
|
|
}
|
|
}
|
|
|
|
func prepareSourceDirectory(numberOfFiles int, targetPath string, makeSymLinks bool) (int, error) {
|
|
fileData := []byte("fooo")
|
|
for n := 0; n < numberOfFiles; n++ {
|
|
fileName := fmt.Sprintf("file-%d", n)
|
|
if err := ioutil.WriteFile(filepath.Join(targetPath, fileName), fileData, 0700); err != nil {
|
|
return 0, err
|
|
}
|
|
if makeSymLinks {
|
|
if err := os.Symlink(filepath.Join(targetPath, fileName), filepath.Join(targetPath, fileName+"-link")); err != nil {
|
|
return 0, err
|
|
}
|
|
}
|
|
}
|
|
totalSize := numberOfFiles * len(fileData)
|
|
return totalSize, nil
|
|
}
|
|
|
|
func getHash(filename string) (uint32, error) {
|
|
stream, err := ioutil.ReadFile(filename)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
hash := crc32.NewIEEE()
|
|
hash.Write(stream)
|
|
return hash.Sum32(), nil
|
|
}
|
|
|
|
func compareDirectories(src string, dest string) error {
|
|
changes, err := archive.ChangesDirs(dest, src)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if len(changes) > 0 {
|
|
return fmt.Errorf("Unexpected differences after untar: %v", changes)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func compareFiles(src string, dest string) error {
|
|
srcHash, err := getHash(src)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
destHash, err := getHash(dest)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if srcHash != destHash {
|
|
return fmt.Errorf("%s is different from %s", src, dest)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func TestChrootTarUntarWithSymlink(t *testing.T) {
|
|
skip.If(t, runtime.GOOS == "windows", "FIXME: figure out why this is failing")
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootTarUntarWithSymlink")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
src := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(src, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := prepareSourceDirectory(10, src, false); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
if err := TarUntar(src, dest); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareDirectories(src, dest); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestChrootCopyWithTar(t *testing.T) {
|
|
skip.If(t, runtime.GOOS == "windows", "FIXME: figure out why this is failing")
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootCopyWithTar")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
src := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(src, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := prepareSourceDirectory(10, src, true); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Copy directory
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
if err := CopyWithTar(src, dest); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareDirectories(src, dest); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Copy file
|
|
srcfile := filepath.Join(src, "file-1")
|
|
dest = filepath.Join(tmpdir, "destFile")
|
|
destfile := filepath.Join(dest, "file-1")
|
|
if err := CopyWithTar(srcfile, destfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareFiles(srcfile, destfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Copy symbolic link
|
|
srcLinkfile := filepath.Join(src, "file-1-link")
|
|
dest = filepath.Join(tmpdir, "destSymlink")
|
|
destLinkfile := filepath.Join(dest, "file-1-link")
|
|
if err := CopyWithTar(srcLinkfile, destLinkfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareFiles(srcLinkfile, destLinkfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestChrootCopyFileWithTar(t *testing.T) {
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootCopyFileWithTar")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
src := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(src, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := prepareSourceDirectory(10, src, true); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Copy directory
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
if err := CopyFileWithTar(src, dest); err == nil {
|
|
t.Fatal("Expected error on copying directory")
|
|
}
|
|
|
|
// Copy file
|
|
srcfile := filepath.Join(src, "file-1")
|
|
dest = filepath.Join(tmpdir, "destFile")
|
|
destfile := filepath.Join(dest, "file-1")
|
|
if err := CopyFileWithTar(srcfile, destfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareFiles(srcfile, destfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Copy symbolic link
|
|
srcLinkfile := filepath.Join(src, "file-1-link")
|
|
dest = filepath.Join(tmpdir, "destSymlink")
|
|
destLinkfile := filepath.Join(dest, "file-1-link")
|
|
if err := CopyFileWithTar(srcLinkfile, destLinkfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareFiles(srcLinkfile, destLinkfile); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestChrootUntarPath(t *testing.T) {
|
|
skip.If(t, runtime.GOOS == "windows", "FIXME: figure out why this is failing")
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootUntarPath")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
src := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(src, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := prepareSourceDirectory(10, src, false); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
// Untar a directory
|
|
if err := UntarPath(src, dest); err == nil {
|
|
t.Fatal("Expected error on untaring a directory")
|
|
}
|
|
|
|
// Untar a tar file
|
|
stream, err := archive.Tar(src, archive.Uncompressed)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
buf := new(bytes.Buffer)
|
|
buf.ReadFrom(stream)
|
|
tarfile := filepath.Join(tmpdir, "src.tar")
|
|
if err := ioutil.WriteFile(tarfile, buf.Bytes(), 0644); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := UntarPath(tarfile, dest); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := compareDirectories(src, dest); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
type slowEmptyTarReader struct {
|
|
size int
|
|
offset int
|
|
chunkSize int
|
|
}
|
|
|
|
// Read is a slow reader of an empty tar (like the output of "tar c --files-from /dev/null")
|
|
func (s *slowEmptyTarReader) Read(p []byte) (int, error) {
|
|
time.Sleep(100 * time.Millisecond)
|
|
count := s.chunkSize
|
|
if len(p) < s.chunkSize {
|
|
count = len(p)
|
|
}
|
|
for i := 0; i < count; i++ {
|
|
p[i] = 0
|
|
}
|
|
s.offset += count
|
|
if s.offset > s.size {
|
|
return count, io.EOF
|
|
}
|
|
return count, nil
|
|
}
|
|
|
|
func TestChrootUntarEmptyArchiveFromSlowReader(t *testing.T) {
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootUntarEmptyArchiveFromSlowReader")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
if err := system.MkdirAll(dest, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
stream := &slowEmptyTarReader{size: 10240, chunkSize: 1024}
|
|
if err := Untar(stream, dest, nil); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestChrootApplyEmptyArchiveFromSlowReader(t *testing.T) {
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootApplyEmptyArchiveFromSlowReader")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
if err := system.MkdirAll(dest, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
stream := &slowEmptyTarReader{size: 10240, chunkSize: 1024}
|
|
if _, err := ApplyLayer(dest, stream); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestChrootApplyDotDotFile(t *testing.T) {
|
|
skip.If(t, os.Getuid() != 0, "skipping test that requires root")
|
|
tmpdir, err := ioutil.TempDir("", "docker-TestChrootApplyDotDotFile")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpdir)
|
|
src := filepath.Join(tmpdir, "src")
|
|
if err := system.MkdirAll(src, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := ioutil.WriteFile(filepath.Join(src, "..gitme"), []byte(""), 0644); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
stream, err := archive.Tar(src, archive.Uncompressed)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
dest := filepath.Join(tmpdir, "dest")
|
|
if err := system.MkdirAll(dest, 0700); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := ApplyLayer(dest, stream); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|