1/*
2   Copyright The containerd Authors.
3
4   Licensed under the Apache License, Version 2.0 (the "License");
5   you may not use this file except in compliance with the License.
6   You may obtain a copy of the License at
7
8       http://www.apache.org/licenses/LICENSE-2.0
9
10   Unless required by applicable law or agreed to in writing, software
11   distributed under the License is distributed on an "AS IS" BASIS,
12   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   See the License for the specific language governing permissions and
14   limitations under the License.
15*/
16
17package fs
18
19import (
20	_ "crypto/sha256"
21	"io/ioutil"
22	"os"
23	"testing"
24	"time"
25
26	"github.com/containerd/continuity/fs/fstest"
27	"github.com/pkg/errors"
28)
29
30// TODO: Create copy directory which requires privilege
31//  chown
32//  mknod
33//  setxattr fstest.SetXAttr("/home", "trusted.overlay.opaque", "y"),
34
35func TestCopyDirectory(t *testing.T) {
36	apply := fstest.Apply(
37		fstest.CreateDir("/etc/", 0755),
38		fstest.CreateFile("/etc/hosts", []byte("localhost 127.0.0.1"), 0644),
39		fstest.Link("/etc/hosts", "/etc/hosts.allow"),
40		fstest.CreateDir("/usr/local/lib", 0755),
41		fstest.CreateFile("/usr/local/lib/libnothing.so", []byte{0x00, 0x00}, 0755),
42		fstest.Symlink("libnothing.so", "/usr/local/lib/libnothing.so.2"),
43		fstest.CreateDir("/home", 0755),
44	)
45
46	if err := testCopy(apply); err != nil {
47		t.Fatalf("Copy test failed: %+v", err)
48	}
49}
50
51// This test used to fail because link-no-nothing.txt would be copied first,
52// then file operations in dst during the CopyDir would follow the symlink and
53// fail.
54func TestCopyDirectoryWithLocalSymlink(t *testing.T) {
55	apply := fstest.Apply(
56		fstest.CreateFile("nothing.txt", []byte{0x00, 0x00}, 0755),
57		fstest.Symlink("nothing.txt", "link-no-nothing.txt"),
58	)
59
60	if err := testCopy(apply); err != nil {
61		t.Fatalf("Copy test failed: %+v", err)
62	}
63}
64
65// TestCopyWithLargeFile tests copying a file whose size > 2^32 bytes.
66func TestCopyWithLargeFile(t *testing.T) {
67	if testing.Short() {
68		t.SkipNow()
69	}
70	apply := fstest.Apply(
71		fstest.CreateDir("/banana", 0755),
72		fstest.CreateRandomFile("/banana/split", time.Now().UnixNano(), 3*1024*1024*1024, 0644),
73	)
74
75	if err := testCopy(apply); err != nil {
76		t.Fatal(err)
77	}
78}
79
80func testCopy(apply fstest.Applier) error {
81	t1, err := ioutil.TempDir("", "test-copy-src-")
82	if err != nil {
83		return errors.Wrap(err, "failed to create temporary directory")
84	}
85	defer os.RemoveAll(t1)
86
87	t2, err := ioutil.TempDir("", "test-copy-dst-")
88	if err != nil {
89		return errors.Wrap(err, "failed to create temporary directory")
90	}
91	defer os.RemoveAll(t2)
92
93	if err := apply.Apply(t1); err != nil {
94		return errors.Wrap(err, "failed to apply changes")
95	}
96
97	if err := CopyDir(t2, t1); err != nil {
98		return errors.Wrap(err, "failed to copy")
99	}
100
101	return fstest.CheckDirectoryEqual(t1, t2)
102}
103