aboutsummaryrefslogtreecommitdiff
path: root/tests/defaults/diriv_test.go
blob: 75f1511272079294bf032b6c10552a58bfcb3660 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
package defaults

import (
	"io/ioutil"
	"os"
	"sync"
	"syscall"
	"testing"
	"time"

	"github.com/rfjakob/gocryptfs/tests/test_helpers"
)

func TestDirIVRace(t *testing.T) {
	// Create "dir1" with one file in it
	dir1 := test_helpers.DefaultPlainDir + "/TestDirIVRace_Dir1"
	err := os.Mkdir(dir1, 0700)
	if err != nil {
		t.Fatal(err)
	}
	err = ioutil.WriteFile(dir1+"/file", nil, 0600)
	if err != nil {
		t.Fatal(err)
	}

	// Create directory "dir2"
	dir2 := test_helpers.DefaultPlainDir + "/TestDirIVRace_Dir2"
	err = os.Mkdir(dir2, 0700)
	if err != nil {
		t.Fatal(err)
	}
	file2 := dir2 + "/file"
	err = ioutil.WriteFile(file2, nil, 0600)
	if err != nil {
		t.Fatal(err)
	}

	stop := false
	defer func() { stop = true }()

	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		wg.Done()
		for {
			// Keep dir2 in the diriv cache
			fd, err2 := os.Open(file2)
			if err2 != nil {
				fd.Close()
			}
			if stop {
				return
			}
		}
	}()
	wg.Wait()
	time.Sleep(time.Millisecond)

	// Overwrite dir2 with dir1
	err = syscall.Unlink(file2)
	if err != nil {
		t.Fatal(err)
	}
	err = syscall.Rename(dir1, dir2)
	if err != nil {
		t.Fatal(err)
	}
	// We should be able to stat file2
	_, err = os.Stat(file2)
	if err != nil {
		t.Error(err)
	}
}