lchown(path, uid, gid, callback) { callback(enosys()); },
			link(path, link, callback) { callback(enosys()); },
			lstat(path, callback) { callback(enosys()); },
			mkdir(path, perm, callback) { callback(enosys()); },
			open(path, flags, mode, callback) { callback(enosys()); },
			read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
			readdir(path, callback) { callback(enosys()); },

	// Set file permission bits.
	mode = fs.FileMode(fi.h.Mode).Perm()

	// Set setuid, setgid and sticky bits.
	if fi.h.Mode&c_ISUID != 0 {
		mode |= fs.ModeSetuid
	}
	if fi.h.Mode&c_ISGID != 0 {
		mode |= fs.ModeSetgid
	}
	if fi.h.Mode&c_ISVTX != 0 {
		mode |= fs.ModeSticky
	}

	// Set file mode bits; clear perm, setuid, setgid, and sticky bits.
	switch m := fs.FileMode(fi.h.Mode) &^ 07777; m {

	h, err := FileInfoHeader(fi, "")
	if err != nil {
		t.Fatalf("FileInfoHeader: %v", err)
	}
	if g, e := h.Name, "small.txt"; g != e {
		t.Errorf("Name = %q; want %q", g, e)
	}
	if g, e := h.Mode, int64(fi.Mode().Perm()); g != e {
		t.Errorf("Mode = %#o; want %#o", g, e)
	}
	if g, e := h.Size, int64(5); g != e {
		t.Errorf("Size = %v; want %v", g, e)
	}
	if g, e := h.ModTime, fi.ModTime(); !g.Equal(e) {

	// wait for sys.boot_completed.
	if err := adb("wait-for-device", "exec-out", "while [[ -z $(getprop sys.boot_completed) ]]; do sleep 1; done;"); err != nil {
		return 0, err
	}

	// Done once per make.bash.
	if err := adbCopyGoroot(); err != nil {
		return 0, err
	}

	// Prepare a temporary directory that will be cleaned up at the end.
	// Binary names can conflict.

pkg os, method (*PathError) Timeout() bool
pkg os, method (*PathError) Unwrap() error
pkg os, method (FileMode) IsDir() bool
pkg os, method (FileMode) IsRegular() bool
pkg os, method (FileMode) Perm() FileMode
pkg os, method (FileMode) String() string
pkg os, type FileInfo interface { IsDir, ModTime, Mode, Name, Size, Sys }
pkg os, type FileInfo interface, IsDir() bool
pkg os, type FileInfo interface, ModTime() time.Time