if file == nil {
		return nil, &fs.PathError{Op: "open", Path: name, Err: fs.ErrNotExist}
	}
	if file.IsDir() {
		return &openDir{file, f.readDir(name), 0}, nil
	}
	return &openFile{file, 0}, nil
}

// ReadDir reads and returns the entire named directory.
func (f FS) ReadDir(name string) ([]fs.DirEntry, error) {
	file, err := f.Open(name)
	if err != nil {
		return nil, err
	}
	dir, ok := file.(*openDir)

	// Prefer to use ReadDir instead of Readdir,
	// because the former doesn't require calling
	// Stat on every entry of a directory on Unix.
	var dirs anyDirs
	var err error
	if d, ok := f.(fs.ReadDirFile); ok {
		var list dirEntryDirs
		list, err = d.ReadDir(-1)
		dirs = list
	} else {
		var list fileInfoDirs
		list, err = f.Readdir(-1)
		dirs = list
	}

	if err != nil {

		t.Helper()
		fi, err := d.Readdir(n)
		if err != wantErr {
			t.Fatalf("Readdir of %d got error %v, want %v", n, err, wantErr)
		}
		if g, e := len(fi), want; g != e {
			t.Errorf("Readdir of %d got %d files, want %d", n, g, e)
		}
	}

	readDirExpect := func(n, want int, wantErr error) {
		t.Helper()
		de, err := d.ReadDir(n)
		if err != wantErr {

// and uploading is supposed to be idempotent.)
func (u *uploader) findWork() work {
	localdir, uploaddir := u.dir.LocalDir(), u.dir.UploadDir()
	var ans work
	fis, err := os.ReadDir(localdir)
	if err != nil {
		u.logger.Printf("Could not find work: failed to read local dir %s: %v", localdir, err)
		return ans
	}

	mode, asof := u.dir.Mode()

	if parentdir == "" || base == "" {
		// skip os.Readdir test of files without directory or file name component,
		// such as directories with slash at the end or Windows device names.
		return
	}

	parent, err := os.Open(parentdir)
	if err != nil {
		t.Error(err)
		return
	}
	defer parent.Close()

	fis, err := parent.Readdir(-1)
	if err != nil {
		t.Error(err)
		return
	}

// license that can be found in the LICENSE file.

package poll

import (
	"syscall"
	_ "unsafe" // for go:linkname
)

// OpenDir returns a pointer to a DIR structure suitable for
// ReadDir. In case of an error, the name of the failed
// syscall is returned along with a syscall.Errno.
func (fd *FD) OpenDir() (uintptr, string, error) {
	// fdopendir(3) takes control of the file descriptor,
	// so use a dup.

	"testing"
	"time"
)

func FuzzDead(f *testing.F) {
	go func() {
		c := filepath.Join(os.Getenv("GOCACHE"), "fuzz", "test", "FuzzDead")
		t := time.NewTicker(time.Second)
		for range t.C {
			files, _ := os.ReadDir(c)
			if len(files) > 0 {
				os.RemoveAll(c)
			}
		}
	}()

	f.Fuzz(func(t *testing.T, b []byte) {
		if len(b) == 8 &&
			b[0] == 'h' &&
			b[1] == 'e' &&
			b[2] == 'l' &&
			b[3] == 'l' &&

	}
	if checkFailed {
		return errors.New("We need to fix the above errors.")
	}
	return nil
}

func processFile(e2ePath string) error {
	regGoFile := regexp.MustCompile(`.*\.go`)

	files, err := os.ReadDir(e2ePath)
	if err != nil {
		return fmt.Errorf("Failed to read dir %s: %w", e2ePath, err)
	}
	for _, file := range files {
		if file.IsDir() {
			continue
		}
		if !regGoFile.MatchString(file.Name()) {

import (
	"bytes"
	"image"
	"os"
	"path/filepath"
	"strings"
	"testing"
)

func FuzzDecode(f *testing.F) {
	if testing.Short() {
		f.Skip("Skipping in short mode")
	}

	testdata, err := os.ReadDir("../testdata")
	if err != nil {
		f.Fatalf("failed to read testdata directory: %s", err)
	}
	for _, de := range testdata {
		if de.IsDir() || !strings.HasSuffix(de.Name(), ".png") {
			continue
		}

	return nil
}

// Pipe is a fake call that returns nil.
func (*FakeOS) Pipe() (r *os.File, w *os.File, err error) {
	return nil, nil, nil
}

// ReadDir is a fake call that returns the files under the directory.
func (f *FakeOS) ReadDir(dirname string) ([]os.DirEntry, error) {
	if f.ReadDirFn != nil {
		return f.ReadDirFn(dirname)
	}
	return nil, nil
}