mirror of
https://github.com/moby/moby.git
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318 lines
10 KiB
Go
318 lines
10 KiB
Go
// +build !windows
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package archive // import "github.com/docker/docker/pkg/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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"strings"
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"syscall"
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"testing"
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"github.com/docker/docker/pkg/system"
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"github.com/gotestyourself/gotestyourself/assert"
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is "github.com/gotestyourself/gotestyourself/assert/cmp"
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"github.com/gotestyourself/gotestyourself/skip"
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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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assert.NilError(t, err)
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defer os.RemoveAll(origin)
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err = ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700)
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assert.NilError(t, err)
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err = os.Link(filepath.Join(origin, "1"), filepath.Join(origin, "2"))
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assert.NilError(t, err)
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var i1, i2 uint64
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i1, err = getNlink(filepath.Join(origin, "1"))
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assert.NilError(t, err)
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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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assert.NilError(t, err)
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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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assert.NilError(t, err)
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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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assert.NilError(t, err)
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bRdr := bytes.NewReader(buf)
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err = Untar(bRdr, dest, &TarOptions{Compression: Uncompressed})
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assert.NilError(t, err)
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i1, err = getInode(filepath.Join(dest, "1"))
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assert.NilError(t, err)
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i2, err = getInode(filepath.Join(dest, "2"))
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assert.NilError(t, err)
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assert.Check(t, is.Equal(i1, i2))
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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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assert.NilError(t, err)
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defer os.RemoveAll(tmpDir)
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origin := filepath.Join(tmpDir, "origin")
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err = os.Mkdir(origin, 0700)
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assert.NilError(t, err)
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err = ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700)
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assert.NilError(t, err)
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err = os.Link(filepath.Join(origin, "1"), filepath.Join(origin, "2"))
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assert.NilError(t, err)
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var i1, i2 uint64
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i1, err = getNlink(filepath.Join(origin, "1"))
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assert.NilError(t, err)
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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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assert.NilError(t, err)
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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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assert.NilError(t, err)
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i1, err = getInode(filepath.Join(dest, "1"))
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assert.NilError(t, err)
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i2, err = getInode(filepath.Join(dest, "2"))
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assert.NilError(t, err)
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assert.Check(t, is.Equal(i1, i2))
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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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skip.If(t, os.Getuid() != 0, "skipping test that requires root")
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origin, err := ioutil.TempDir("", "docker-test-tar-hardlink")
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assert.NilError(t, err)
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defer os.RemoveAll(origin)
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err = ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700)
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assert.NilError(t, err)
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err = system.Mknod(filepath.Join(origin, "2"), unix.S_IFBLK, int(system.Mkdev(int64(12), int64(5))))
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assert.NilError(t, err)
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err = system.Mknod(filepath.Join(origin, "3"), unix.S_IFCHR, int(system.Mkdev(int64(12), int64(5))))
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assert.NilError(t, err)
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err = system.Mknod(filepath.Join(origin, "4"), unix.S_IFIFO, int(system.Mkdev(int64(12), int64(5))))
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assert.NilError(t, err)
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dest, err := ioutil.TempDir("", "docker-test-tar-hardlink-dest")
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assert.NilError(t, err)
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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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assert.NilError(t, err)
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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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assert.NilError(t, err)
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bRdr := bytes.NewReader(buf)
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err = Untar(bRdr, dest, &TarOptions{Compression: Uncompressed})
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assert.NilError(t, err)
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changes, err := ChangesDirs(origin, dest)
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assert.NilError(t, err)
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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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skip.If(t, os.Getuid() != 0, "skipping test that requires root")
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origin, err := ioutil.TempDir("", "docker-test-untar-origin")
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assert.NilError(t, err)
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defer os.RemoveAll(origin)
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err = ioutil.WriteFile(filepath.Join(origin, "1"), []byte("hello world"), 0700)
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assert.NilError(t, err)
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err = ioutil.WriteFile(filepath.Join(origin, "2"), []byte("welcome!"), 0700)
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assert.NilError(t, err)
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err = ioutil.WriteFile(filepath.Join(origin, "3"), []byte("will be ignored"), 0700)
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assert.NilError(t, err)
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err = system.Lsetxattr(filepath.Join(origin, "2"), "security.capability", []byte{0x00}, 0)
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assert.NilError(t, err)
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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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func TestCopyInfoDestinationPathSymlink(t *testing.T) {
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tmpDir, _ := getTestTempDirs(t)
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defer removeAllPaths(tmpDir)
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root := strings.TrimRight(tmpDir, "/") + "/"
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type FileTestData struct {
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resource FileData
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file string
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expected CopyInfo
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}
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testData := []FileTestData{
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//Create a directory: /tmp/archive-copy-test*/dir1
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//Test will "copy" file1 to dir1
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{resource: FileData{filetype: Dir, path: "dir1", permissions: 0740}, file: "file1", expected: CopyInfo{Path: root + "dir1/file1", Exists: false, IsDir: false}},
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//Create a symlink directory to dir1: /tmp/archive-copy-test*/dirSymlink -> dir1
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//Test will "copy" file2 to dirSymlink
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{resource: FileData{filetype: Symlink, path: "dirSymlink", contents: root + "dir1", permissions: 0600}, file: "file2", expected: CopyInfo{Path: root + "dirSymlink/file2", Exists: false, IsDir: false}},
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//Create a file in tmp directory: /tmp/archive-copy-test*/file1
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//Test to cover when the full file path already exists.
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{resource: FileData{filetype: Regular, path: "file1", permissions: 0600}, file: "", expected: CopyInfo{Path: root + "file1", Exists: true}},
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//Create a directory: /tmp/archive-copy*/dir2
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//Test to cover when the full directory path already exists
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{resource: FileData{filetype: Dir, path: "dir2", permissions: 0740}, file: "", expected: CopyInfo{Path: root + "dir2", Exists: true, IsDir: true}},
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//Create a symlink to a non-existent target: /tmp/archive-copy*/symlink1 -> noSuchTarget
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//Negative test to cover symlinking to a target that does not exit
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{resource: FileData{filetype: Symlink, path: "symlink1", contents: "noSuchTarget", permissions: 0600}, file: "", expected: CopyInfo{Path: root + "noSuchTarget", Exists: false}},
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//Create a file in tmp directory for next test: /tmp/existingfile
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{resource: FileData{filetype: Regular, path: "existingfile", permissions: 0600}, file: "", expected: CopyInfo{Path: root + "existingfile", Exists: true}},
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//Create a symlink to an existing file: /tmp/archive-copy*/symlink2 -> /tmp/existingfile
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//Test to cover when the parent directory of a new file is a symlink
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{resource: FileData{filetype: Symlink, path: "symlink2", contents: "existingfile", permissions: 0600}, file: "", expected: CopyInfo{Path: root + "existingfile", Exists: true}},
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}
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var dirs []FileData
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for _, data := range testData {
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dirs = append(dirs, data.resource)
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}
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provisionSampleDir(t, tmpDir, dirs)
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for _, info := range testData {
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p := filepath.Join(tmpDir, info.resource.path, info.file)
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ci, err := CopyInfoDestinationPath(p)
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assert.Check(t, err)
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assert.Check(t, is.DeepEqual(info.expected, ci))
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}
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}
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