303 lines
7.6 KiB
Go
303 lines
7.6 KiB
Go
// +build !windows
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package archive
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"syscall"
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"testing"
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"github.com/docker/docker/pkg/system"
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"golang.org/x/sys/unix"
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)
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func TestCanonicalTarNameForPath(t *testing.T) {
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cases := []struct{ in, expected string }{
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{"foo", "foo"},
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{"foo/bar", "foo/bar"},
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{"foo/dir/", "foo/dir/"},
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}
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for _, v := range cases {
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if out, err := CanonicalTarNameForPath(v.in); err != nil {
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t.Fatalf("cannot get canonical name for path: %s: %v", v.in, err)
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} else if out != v.expected {
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t.Fatalf("wrong canonical tar name. expected:%s got:%s", v.expected, out)
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}
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}
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}
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func TestCanonicalTarName(t *testing.T) {
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cases := []struct {
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in string
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isDir bool
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expected string
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}{
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{"foo", false, "foo"},
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{"foo", true, "foo/"},
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{"foo/bar", false, "foo/bar"},
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{"foo/bar", true, "foo/bar/"},
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}
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for _, v := range cases {
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if out, err := canonicalTarName(v.in, v.isDir); err != nil {
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t.Fatalf("cannot get canonical name for path: %s: %v", v.in, err)
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} else if out != v.expected {
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t.Fatalf("wrong canonical tar name. expected:%s got:%s", v.expected, out)
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}
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}
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}
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func TestChmodTarEntry(t *testing.T) {
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cases := []struct {
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in, expected os.FileMode
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}{
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{0000, 0000},
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{0777, 0777},
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{0644, 0644},
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{0755, 0755},
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{0444, 0444},
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}
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for _, v := range cases {
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if out := chmodTarEntry(v.in); out != v.expected {
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t.Fatalf("wrong chmod. expected:%v got:%v", v.expected, out)
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}
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}
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}
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func TestTarWithHardLink(t *testing.T) {
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origin, err := ioutil.TempDir("", "docker-test-tar-hardlink")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(origin)
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if err := ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700); err != nil {
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t.Fatal(err)
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}
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if err := os.Link(filepath.Join(origin, "1"), filepath.Join(origin, "2")); err != nil {
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t.Fatal(err)
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}
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var i1, i2 uint64
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if i1, err = getNlink(filepath.Join(origin, "1")); err != nil {
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t.Fatal(err)
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}
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// sanity check that we can hardlink
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if i1 != 2 {
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t.Skipf("skipping since hardlinks don't work here; expected 2 links, got %d", i1)
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}
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dest, err := ioutil.TempDir("", "docker-test-tar-hardlink-dest")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dest)
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// we'll do this in two steps to separate failure
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fh, err := Tar(origin, Uncompressed)
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if err != nil {
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t.Fatal(err)
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}
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// ensure we can read the whole thing with no error, before writing back out
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buf, err := ioutil.ReadAll(fh)
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if err != nil {
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t.Fatal(err)
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}
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bRdr := bytes.NewReader(buf)
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err = Untar(bRdr, dest, &TarOptions{Compression: Uncompressed})
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if err != nil {
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t.Fatal(err)
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}
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if i1, err = getInode(filepath.Join(dest, "1")); err != nil {
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t.Fatal(err)
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}
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if i2, err = getInode(filepath.Join(dest, "2")); err != nil {
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t.Fatal(err)
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}
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if i1 != i2 {
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t.Errorf("expected matching inodes, but got %d and %d", i1, i2)
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}
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}
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func TestTarWithHardLinkAndRebase(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "docker-test-tar-hardlink-rebase")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(tmpDir)
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origin := filepath.Join(tmpDir, "origin")
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if err := os.Mkdir(origin, 0700); err != nil {
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t.Fatal(err)
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}
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if err := ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700); err != nil {
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t.Fatal(err)
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}
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if err := os.Link(filepath.Join(origin, "1"), filepath.Join(origin, "2")); err != nil {
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t.Fatal(err)
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}
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var i1, i2 uint64
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if i1, err = getNlink(filepath.Join(origin, "1")); err != nil {
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t.Fatal(err)
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}
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// sanity check that we can hardlink
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if i1 != 2 {
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t.Skipf("skipping since hardlinks don't work here; expected 2 links, got %d", i1)
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}
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dest := filepath.Join(tmpDir, "dest")
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bRdr, err := TarResourceRebase(origin, "origin")
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if err != nil {
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t.Fatal(err)
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}
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dstDir, srcBase := SplitPathDirEntry(origin)
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_, dstBase := SplitPathDirEntry(dest)
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content := RebaseArchiveEntries(bRdr, srcBase, dstBase)
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err = Untar(content, dstDir, &TarOptions{Compression: Uncompressed, NoLchown: true, NoOverwriteDirNonDir: true})
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if err != nil {
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t.Fatal(err)
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}
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if i1, err = getInode(filepath.Join(dest, "1")); err != nil {
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t.Fatal(err)
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}
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if i2, err = getInode(filepath.Join(dest, "2")); err != nil {
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t.Fatal(err)
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}
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if i1 != i2 {
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t.Errorf("expected matching inodes, but got %d and %d", i1, i2)
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}
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}
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func getNlink(path string) (uint64, error) {
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stat, err := os.Stat(path)
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if err != nil {
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return 0, err
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}
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statT, ok := stat.Sys().(*syscall.Stat_t)
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if !ok {
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return 0, fmt.Errorf("expected type *syscall.Stat_t, got %t", stat.Sys())
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}
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// We need this conversion on ARM64
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return uint64(statT.Nlink), nil
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}
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func getInode(path string) (uint64, error) {
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stat, err := os.Stat(path)
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if err != nil {
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return 0, err
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}
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statT, ok := stat.Sys().(*syscall.Stat_t)
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if !ok {
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return 0, fmt.Errorf("expected type *syscall.Stat_t, got %t", stat.Sys())
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}
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return statT.Ino, nil
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}
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func TestTarWithBlockCharFifo(t *testing.T) {
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origin, err := ioutil.TempDir("", "docker-test-tar-hardlink")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(origin)
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if err := ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700); err != nil {
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t.Fatal(err)
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}
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if err := system.Mknod(filepath.Join(origin, "2"), unix.S_IFBLK, int(system.Mkdev(int64(12), int64(5)))); err != nil {
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t.Fatal(err)
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}
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if err := system.Mknod(filepath.Join(origin, "3"), unix.S_IFCHR, int(system.Mkdev(int64(12), int64(5)))); err != nil {
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t.Fatal(err)
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}
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if err := system.Mknod(filepath.Join(origin, "4"), unix.S_IFIFO, int(system.Mkdev(int64(12), int64(5)))); err != nil {
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t.Fatal(err)
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}
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dest, err := ioutil.TempDir("", "docker-test-tar-hardlink-dest")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dest)
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// we'll do this in two steps to separate failure
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fh, err := Tar(origin, Uncompressed)
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if err != nil {
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t.Fatal(err)
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}
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// ensure we can read the whole thing with no error, before writing back out
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buf, err := ioutil.ReadAll(fh)
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if err != nil {
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t.Fatal(err)
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}
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bRdr := bytes.NewReader(buf)
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err = Untar(bRdr, dest, &TarOptions{Compression: Uncompressed})
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if err != nil {
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t.Fatal(err)
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}
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changes, err := ChangesDirs(origin, dest)
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if err != nil {
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t.Fatal(err)
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}
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if len(changes) > 0 {
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t.Fatalf("Tar with special device (block, char, fifo) should keep them (recreate them when untar) : %v", changes)
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}
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}
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// TestTarUntarWithXattr is Unix as Lsetxattr is not supported on Windows
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func TestTarUntarWithXattr(t *testing.T) {
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if runtime.GOOS == "solaris" {
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t.Skip()
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}
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origin, err := ioutil.TempDir("", "docker-test-untar-origin")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(origin)
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if err := ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700); err != nil {
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t.Fatal(err)
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}
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if err := ioutil.WriteFile(filepath.Join(origin, "2"), []byte("welcome!"), 0700); err != nil {
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t.Fatal(err)
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}
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if err := ioutil.WriteFile(filepath.Join(origin, "3"), []byte("will be ignored"), 0700); err != nil {
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t.Fatal(err)
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}
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if err := system.Lsetxattr(filepath.Join(origin, "2"), "security.capability", []byte{0x00}, 0); err != nil {
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t.Fatal(err)
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}
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for _, c := range []Compression{
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Uncompressed,
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Gzip,
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} {
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changes, err := tarUntar(t, origin, &TarOptions{
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Compression: c,
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ExcludePatterns: []string{"3"},
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})
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if err != nil {
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t.Fatalf("Error tar/untar for compression %s: %s", c.Extension(), err)
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}
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if len(changes) != 1 || changes[0].Path != "/3" {
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t.Fatalf("Unexpected differences after tarUntar: %v", changes)
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}
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capability, _ := system.Lgetxattr(filepath.Join(origin, "2"), "security.capability")
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if capability == nil && capability[0] != 0x00 {
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t.Fatalf("Untar should have kept the 'security.capability' xattr.")
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}
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}
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}
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