package defaults import ( "bytes" "fmt" "io/ioutil" "os" "strings" "syscall" "testing" "github.com/pkg/xattr" "github.com/rfjakob/gocryptfs/tests/test_helpers" ) // On modern Linux distributions, /tmp may be on tmpfs, // which does not support user xattrs. Try /var/tmp instead. var alternateTestParentDir = "/var/tmp/gocryptfs-xattr-test-parent" func TestMain(m *testing.M) { if !xattrSupported(test_helpers.TmpDir) { test_helpers.SwitchTestParentDir(alternateTestParentDir) } if !xattrSupported(test_helpers.TmpDir) { fmt.Printf("xattrs not supported on %q", test_helpers.TmpDir) os.Exit(1) } test_helpers.ResetTmpDir(true) test_helpers.MountOrExit(test_helpers.DefaultCipherDir, test_helpers.DefaultPlainDir, "-zerokey") r := m.Run() test_helpers.UnmountPanic(test_helpers.DefaultPlainDir) os.RemoveAll(test_helpers.TmpDir) os.Exit(r) } func TestXattrSetGetRm(t *testing.T) { attr := "user.foo" fn := test_helpers.DefaultPlainDir + "/TestXattrSetGetRm" err := ioutil.WriteFile(fn, nil, 0700) if err != nil { t.Fatalf("creating empty file failed: %v", err) } // Set val1 := []byte("123456789") err = xattr.Set(fn, attr, val1) if err != nil { t.Fatal(err) } // Read back val2, err := xattr.Get(fn, attr) if err != nil { t.Fatal(err) } if !bytes.Equal(val1, val2) { t.Fatalf("wrong readback value: %v != %v", val1, val2) } // Remove err = xattr.Remove(fn, attr) if err != nil { t.Fatal(err) } // Read back val3, err := xattr.Get(fn, attr) if err == nil { t.Fatalf("attr is still there after deletion!? val3=%v", val3) } } func TestXattrSetEmpty(t *testing.T) { attr := "user.foo" fn := test_helpers.DefaultPlainDir + "/TestXattrSetEmpty1" err := ioutil.WriteFile(fn, nil, 0700) if err != nil { t.Fatalf("creating empty file failed: %v", err) } // Make sure it does not exist already _, err = xattr.Get(fn, attr) if err == nil { t.Fatal("we should have got an error here") } // Set empty value err = xattr.Set(fn, attr, nil) if err != nil { t.Fatal(err) } // Read back val, err := xattr.Get(fn, attr) if err != nil { t.Fatal(err) } if len(val) != 0 { t.Errorf("wrong length: want=0 have=%d", len(val)) } // Overwrite empty value with something val1 := []byte("xyz123") err = xattr.Set(fn, attr, val1) if err != nil { t.Fatal(err) } // Read back val2, err := xattr.Get(fn, attr) if err != nil { t.Fatal(err) } if !bytes.Equal(val1, val2) { t.Fatalf("wrong readback value: %v != %v", val1, val2) } // Overwrite something with empty value err = xattr.Set(fn, attr, nil) if err != nil { t.Fatal(err) } // Read back val, err = xattr.Get(fn, attr) if err != nil { t.Fatal(err) } if len(val) != 0 { t.Errorf("wrong length: want=0 have=%d", len(val2)) } } func TestXattrList(t *testing.T) { fn := test_helpers.DefaultPlainDir + "/TestXattrList" err := ioutil.WriteFile(fn, nil, 0700) if err != nil { t.Fatalf("creating empty file failed: %v", err) } val := []byte("xxxxxxxxyyyyyyyyyyyyyyyzzzzzzzzzzzzz") num := 20 for i := 1; i <= num; i++ { attr := fmt.Sprintf("user.TestXattrList.%02d", i) err = xattr.Set(fn, attr, val) if err != nil { t.Fatal(err) } } names, err := xattr.List(fn) if err != nil { t.Fatal(err) } if len(names) != num { t.Errorf("wrong number of names, want=%d have=%d", num, len(names)) } for _, n := range names { if !strings.HasPrefix(n, "user.TestXattrList.") { t.Errorf("unexpected attr name: %q", n) } } } func xattrSupported(path string) bool { _, err := xattr.Get(path, "user.xattrSupported-dummy-value") if err == nil { return true } err2 := err.(*xattr.Error) if err2.Err == syscall.EOPNOTSUPP { return false } return true }