extraSidAtts[ i ] = new PacSidAttributes(sid, attributes[ i ]);
                }
            }

            // ID for resource domain (used with relative IDs to get SIDs)
            SID resourceDomainId = null;
            if ( resourceDomainIdPointer != 0 )
                resourceDomainId = pacStream.readSid();

            // Resource groups data

            0, 0, 0, 0, 0, 5
        }, 0, sidBytes, 2, 6);
        System.arraycopy(bytes, 0, sidBytes, 8, bytes.length);

        return new SID(sidBytes, 0);
    }


    public SID readSid () throws IOException, PACDecodingException {
        int sidSize = readInt();
        byte[] bytes = new byte[8 + sidSize * 4];
        readFully(bytes);
        return new SID(bytes, 0);
    }

// that provides an optimized implementation of [ReadDir].
type ReadDirFS interface {
	FS

	// ReadDir reads the named directory
	// and returns a list of directory entries sorted by filename.
	ReadDir(name string) ([]DirEntry, error)
}

// ReadDir reads the named directory
// and returns a list of directory entries sorted by filename.
//
// If fs implements [ReadDirFS], ReadDir calls fs.ReadDir.

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

// Options for readDir function call
type readDirOpts struct {
	// The maximum number of entries to return
	count int
	// Follow directory symlink
	followDirSymlink bool
}

// Return all the entries at the directory dirPath.
func readDir(dirPath string) (entries []string, err error) {
	return readDirWithOpts(dirPath, readDirOpts{count: -1})
}

			if err != nil {
				t.Fatal(err)
			}
			if _, ok := SupportedKDFs[uint16(kdfID)]; !ok {
				t.Skip("unsupported KDF")
			}
			aeadID, err := strconv.Atoi(setup["aead_id"])
			if err != nil {
				t.Fatal(err)
			}
			if _, ok := SupportedAEADs[uint16(aeadID)]; !ok {
				t.Skip("unsupported AEAD")
			}

			info := mustDecodeHex(t, setup["info"])
			pubKeyBytes := mustDecodeHex(t, setup["pkRm"])

func (f *File) Readdir(n int) ([]FileInfo, error) {
	if f == nil {
		return nil, ErrInvalid
	}
	_, _, infos, err := f.readdir(n, readdirFileInfo)
	if infos == nil {
		// Readdir has historically always returned a non-nil empty slice, never nil,
		// even on error (except misuse with nil receiver above).
		// Keep it that way to avoid breaking overly sensitive callers.
		infos = []FileInfo{}
	}
	return infos, err
}

// It is used to wrap the Readdir method of http.File so that we can
// remove files and directories that start with a period from its output.
type dotFileHidingFile struct {
	http.File
}

// Readdir is a wrapper around the Readdir method of the embedded File
// that filters out all files that start with a period in their name.
func (f dotFileHidingFile) Readdir(n int) (fis []fs.FileInfo, err error) {

			d.bufp, d.nbuf = 0, nb

			if err != nil {
				if err == io.EOF {
					break
				}
				return names, dirents, infos, &PathError{Op: "readdir", Path: file.name, Err: err}
			}
			if nb < syscall.STATFIXLEN {
				return names, dirents, infos, &PathError{Op: "readdir", Path: file.name, Err: syscall.ErrShortStat}
			}
		}

		// Get a record from the buffer.
		b := d.buf[d.bufp:]

			t.errorf("%s: third Open: ReadDir(%d) after %d: 0 entries but nil error", dir, n, len(list2))
			return
		}
	}
	t.checkDirList(dir, "first Open+ReadDir(-1) vs third Open+ReadDir(1,2) loop", list, list2)

	// If fsys has ReadDir, check that it matches and is sorted.
	if fsys, ok := t.fsys.(fs.ReadDirFS); ok {
		list2, err := fsys.ReadDir(dir)
		if err != nil {
			t.errorf("%s: fsys.ReadDir: %w", dir, err)
			return
		}

				names = append(names, d.Name())
			}
			t.Errorf("ReadDir(%s) = %v, %v, want %v, nil", desc, names, err, []string{"hello.txt", "sub"})
		}
	}

	// Test that ReadDir uses the method when present.
	dirs, err := ReadDir(readDirOnly{testFsys}, ".")
	check("readDirOnly", dirs, err)

	// Test that ReadDir uses Open when the method is not present.
	dirs, err = ReadDir(openOnly{testFsys}, ".")
	check("openOnly", dirs, err)