blob: 639b33d00276cd2967d98d5228f0c7bb27c7f4b6 (
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
74
|
package defaults
import (
"io/ioutil"
"os"
"sync"
"sync/atomic"
"syscall"
"testing"
"time"
"github.com/rfjakob/gocryptfs/v2/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)
}
var stop int32
defer func() { atomic.StoreInt32(&stop, 1) }()
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 atomic.LoadInt32(&stop) != 0 {
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)
}
}
|
