1 // Copyright 2019 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
22 "golang.org/x/sys/unix"
25 func TestDirent(t *testing.T) {
31 d, err := ioutil.TempDir("", "dirent-test")
33 t.Fatalf("tempdir: %v", err)
36 t.Logf("tmpdir: %s", d)
38 for i, c := range []byte("0123456789") {
39 name := string(bytes.Repeat([]byte{c}, filenameMinSize+i))
40 err = ioutil.WriteFile(filepath.Join(d, name), nil, 0644)
42 t.Fatalf("writefile: %v", err)
46 buf := bytes.Repeat([]byte("DEADBEAF"), direntBufSize/8)
47 fd, err := unix.Open(d, unix.O_RDONLY, 0)
49 t.Fatalf("Open: %v", err)
52 n, err := unix.ReadDirent(fd, buf)
54 t.Fatalf("ReadDirent: %v", err)
58 names := make([]string, 0, 10)
61 bc, _, names = unix.ParseDirent(buf, -1, names)
62 if bc == 0 && len(buf) > 0 {
63 t.Fatal("no progress")
69 t.Logf("names: %q", names)
72 t.Errorf("got %d names; expected 10", len(names))
74 for i, name := range names {
75 ord, err := strconv.Atoi(name[:1])
77 t.Fatalf("names[%d] is non-integer %q: %v", i, names[i], err)
79 if expected := string(strings.Repeat(name[:1], filenameMinSize+ord)); name != expected {
80 t.Errorf("names[%d] is %q (len %d); expected %q (len %d)", i, name, len(name), expected, len(expected))
85 func TestDirentRepeat(t *testing.T) {
87 // Note: the size of the buffer is small enough that the loop
88 // below will need to execute multiple times. See issue #31368.
89 size := N * unsafe.Offsetof(unix.Dirent{}.Name) / 4
90 if runtime.GOOS == "freebsd" || runtime.GOOS == "netbsd" {
92 size = 1024 // DIRBLKSIZ, see issue 31403.
94 if runtime.GOOS == "freebsd" {
95 t.Skip("need to fix issue 31416 first")
99 // Make a directory containing N files
100 d, err := ioutil.TempDir("", "direntRepeat-test")
102 t.Fatalf("tempdir: %v", err)
104 defer os.RemoveAll(d)
107 for i := 0; i < N; i++ {
108 files = append(files, fmt.Sprintf("file%d", i))
110 for _, file := range files {
111 err = ioutil.WriteFile(filepath.Join(d, file), []byte("contents"), 0644)
113 t.Fatalf("writefile: %v", err)
117 // Read the directory entries using ReadDirent.
118 fd, err := unix.Open(d, unix.O_RDONLY, 0)
120 t.Fatalf("Open: %v", err)
125 buf := make([]byte, size)
126 n, err := unix.ReadDirent(fd, buf)
128 t.Fatalf("ReadDirent: %v", err)
136 consumed, _, files2 = unix.ParseDirent(buf, -1, files2)
137 if consumed == 0 && len(buf) > 0 {
138 t.Fatal("no progress")
147 if strings.Join(files, "|") != strings.Join(files2, "|") {
148 t.Errorf("bad file list: want\n%q\ngot\n%q", files, files2)