1 // Copyright 2009 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.
13 func (file *File) readdir(n int, mode readdirMode) (names []string, dirents []DirEntry, infos []FileInfo, err error) {
14 // If this file has no dirinfo, create one.
15 if file.dirinfo == nil {
16 file.dirinfo = new(dirInfo)
25 // Refill the buffer if necessary.
27 nb, err := file.Read(d.buf[:])
29 // Update the buffer state before checking for errors.
30 d.bufp, d.nbuf = 0, nb
36 return names, dirents, infos, &PathError{Op: "readdir", Path: file.name, Err: err}
38 if nb < syscall.STATFIXLEN {
39 return names, dirents, infos, &PathError{Op: "readdir", Path: file.name, Err: syscall.ErrShortStat}
43 // Get a record from the buffer.
45 m := int(uint16(b[0])|uint16(b[1])<<8) + 2
46 if m < syscall.STATFIXLEN {
47 return names, dirents, infos, &PathError{Op: "readdir", Path: file.name, Err: syscall.ErrShortStat}
50 dir, err := syscall.UnmarshalDir(b[:m])
52 return names, dirents, infos, &PathError{Op: "readdir", Path: file.name, Err: err}
55 if mode == readdirName {
56 names = append(names, dir.Name)
58 f := fileInfoFromStat(dir)
59 if mode == readdirDirEntry {
60 dirents = append(dirents, dirEntry{f})
62 infos = append(infos, f)
69 if n > 0 && len(names)+len(dirents)+len(infos) == 0 {
70 return nil, nil, nil, io.EOF
72 return names, dirents, infos, nil
75 type dirEntry struct {
79 func (de dirEntry) Name() string { return de.fs.Name() }
80 func (de dirEntry) IsDir() bool { return de.fs.IsDir() }
81 func (de dirEntry) Type() FileMode { return de.fs.Mode().Type() }
82 func (de dirEntry) Info() (FileInfo, error) { return de.fs, nil }
84 func (de dirEntry) String() string {
85 return fs.FormatDirEntry(de)