}

func fakeListen(fd *netFD, laddr sockaddr) (err error) {
	wrapErr := func(err error) error {
		if errno, ok := err.(syscall.Errno); ok {
			err = os.NewSyscallError("listen", errno)
		}
		if errors.Is(err, syscall.EADDRINUSE) {
			return err
		}
		if laddr != nil {
			if _, ok := err.(*AddrError); !ok {
				err = &AddrError{
					Err:  err.Error(),
					Addr: laddr.String(),
				}
			}
		}

		err = MkdirAll(parent, perm)
		if err != nil {
			return err
		}
	}

	// Parent now exists; invoke Mkdir and use its result.
	err = Mkdir(path, perm)
	if err != nil {
		// Handle arguments like "foo/." by
		// double-checking that directory doesn't exist.
		dir, err1 := Lstat(path)
		if err1 == nil && dir.IsDir() {
			return nil
		}
		return err
	}

func testOverflow(t *testing.T, buf []byte, x0 uint64, n0 int, err0 error) {
	x, n := Uvarint(buf)
	if x != 0 || n != n0 {
		t.Errorf("Uvarint(% X): got x = %d, n = %d; want 0, %d", buf, x, n, n0)
	}

	r := bytes.NewReader(buf)
	len := r.Len()
	x, err := ReadUvarint(r)
	if x != x0 || err != err0 {
		t.Errorf("ReadUvarint(%v): got x = %d, err = %s; want %d, %s", buf, x, err, x0, err0)
	}

					if src := from.GetSource(); src != nil {
						errs = appendErrors(errs, check(len(src.Namespaces) != 0, "From.Namespaces"))
						errs = appendErrors(errs, check(len(src.NotNamespaces) != 0, "From.NotNamespaces"))
						errs = appendErrors(errs, check(len(src.Principals) != 0, "From.Principals"))
						errs = appendErrors(errs, check(len(src.NotPrincipals) != 0, "From.NotPrincipals"))

	}
	data = append(data, '\n') // makes -x output more readable

	// Create the directory for this action's objdir and
	// then write out the serialized collection
	// to a file in the directory.
	if err := sh.Mkdir(a.Objdir); err != nil {
		return err
	}
	mfpath := a.Objdir + coverage.MetaFilesFileName
	if err := sh.writeFile(mfpath, data); err != nil {
		return fmt.Errorf("writing metafiles file: %v", err)
	}

	var errs []error
	if len(profile.SchedulerName) == 0 {
		errs = append(errs, field.Required(path.Child("schedulerName"), ""))
	}
	errs = append(errs, validatePercentageOfNodesToScore(path.Child("percentageOfNodesToScore"), profile.PercentageOfNodesToScore))
	errs = append(errs, validatePluginConfig(path, apiVersion, profile)...)
	return errs
}

	errs = append(errs, s.Authentication.Validate()...)
	errs = append(errs, s.Authorization.Validate()...)
	errs = append(errs, s.Audit.Validate()...)
	errs = append(errs, s.Admission.Validate()...)
	errs = append(errs, s.APIEnablement.Validate(legacyscheme.Scheme, apiextensionsapiserver.Scheme, aggregatorscheme.Scheme)...)
	errs = append(errs, validateTokenRequest(s)...)
	errs = append(errs, s.Metrics.Validate()...)

	e := &joinError{
		errs: make([]error, 0, n),
	}
	for _, err := range errs {
		if err != nil {
			e.errs = append(e.errs, err)
		}
	}
	return e
}

type joinError struct {
	errs []error
}

func (e *joinError) Error() string {
	// Since Join returns nil if every value in errs is nil,
	// e.errs cannot be empty.
	if len(e.errs) == 1 {
		return e.errs[0].Error()
	}

	b := []byte(e.errs[0].Error())

func ioctl(fd uintptr, req uintptr, arg uintptr) (err Errno)
func setgid(gid uintptr) (err Errno)
func setgroups1(ngid uintptr, gid uintptr) (err Errno)
func setrlimit1(which uintptr, lim unsafe.Pointer) (err Errno)
func setsid() (pid uintptr, err Errno)
func setuid(uid uintptr) (err Errno)
func setpgid(pid uintptr, pgid uintptr) (err Errno)
func write1(fd uintptr, buf uintptr, nbyte uintptr) (n uintptr, err Errno)

			t.Error(err)
			continue
		}
		tf, err := os.OpenFile(tmp, os.O_WRONLY, 0)
		if err != nil {
			t.Error(err)
			continue
		}
		err = Rewrite(tf, m, newID)
		err2 := tf.Close()
		if err != nil {
			t.Errorf("Rewrite(%s): %v", f, err)
			continue
		}
		if err2 != nil {
			t.Fatal(err2)
		}

		id, err = ReadFile(tmp)
		if id != newID || err != nil {