path string
	err  error
	sync.Once
}

func chdir(t *testing.T, dir string) {
	t.Helper()

	prev, err := os.Getwd()
	if err != nil {
		t.Fatal(err)
	}
	if err := os.Chdir(dir); err != nil {
		t.Fatal(err)
	}
	t.Logf("Chdir(%#q)", dir)

	t.Cleanup(func() {
		if err := os.Chdir(prev); err != nil {
			// Couldn't chdir back to the original working directory.

	t.Helper()

	// Create a temporary directory and chdir to it.
	prevwd, err := os.Getwd()
	if err != nil {
		t.Fatal(err)
	}
	cwd = filepath.Join(t.TempDir(), "root")
	if err := os.Mkdir(cwd, 0777); err != nil {
		t.Fatal(err)
	}
	if err := os.Chdir(cwd); err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() {
		if err := os.Chdir(prevwd); err != nil {
			t.Fatal(err)
		}
	})

	if err != nil {
		t.Fatalf("chtmpdir: %v", err)
	}
	d, err := os.MkdirTemp("", "test")
	if err != nil {
		t.Fatalf("chtmpdir: %v", err)
	}
	if err := os.Chdir(d); err != nil {
		t.Fatalf("chtmpdir: %v", err)
	}
	return func() {
		if err := os.Chdir(oldwd); err != nil {
			t.Fatalf("chtmpdir: %v", err)
		}
		os.RemoveAll(d)
	}
}

func touch(t *testing.T, name string) {
	f, err := os.Create(name)

/*
 * Exposed directly
 */
//sys	Access(path string, mode uint32) (err error)
//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
//sys	Chdir(path string) (err error)
//sys	Chflags(path string, flags int) (err error)
//sys	Chmod(path string, mode uint32) (err error)
//sys	Chown(path string, uid int, gid int) (err error)
//sys	Chroot(path string) (err error)

		RootCert:     fakeRootCert,
		ResourceName: ca2.RootCertReqResourceName,
	})

	opts := &ca2.Options{}

	// SDS uses a hardcoded UDS path relative to current dir, so switch to a new one for the test.
	os.Chdir(t.TempDir())
	if usefakePrivateKeyProviderConf {
		server = NewServer(opts, st, fakePrivateKeyProviderConf)
	} else {
		server = NewServer(opts, st, nil)
	}
	t.Cleanup(func() {
		server.Stop()
	})

	return Statvfs1(path, buf, ST_WAIT)
}

/*
 * Exposed directly
 */
//sys	Access(path string, mode uint32) (err error)
//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
//sys	Chdir(path string) (err error)
//sys	Chflags(path string, flags int) (err error)
//sys	Chmod(path string, mode uint32) (err error)
//sys	Chown(path string, uid int, gid int) (err error)
//sys	Chroot(path string) (err error)

	}
	return sendfile(outfd, infd, offset, count)
}

/*
 * Exposed directly
 */
//sys	Access(path string, mode uint32) (err error)
//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
//sys	Chdir(path string) (err error)
//sys	Chflags(path string, flags int) (err error)
//sys	Chmod(path string, mode uint32) (err error)
//sys	Chown(path string, uid int, gid int) (err error)
//sys	Chroot(path string) (err error)

		return err
	}

	return nil
}

/*
 * Exposed directly
 */
//sys	Access(path string, mode uint32) (err error)
//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)
//sys	Chdir(path string) (err error)
//sys	Chflags(path string, flags int) (err error)
//sys	Chmod(path string, mode uint32) (err error)
//sys	Chown(path string, uid int, gid int) (err error)
//sys	Chroot(path string) (err error)

	gopath := filepath.Join(work, "gopath")
	must(s.Setenv("GOPATH", gopath))
	gopathSrc := filepath.Join(gopath, "src")
	must(os.MkdirAll(gopathSrc, 0777))
	must(s.Chdir(gopathSrc))
	return telemetryDir
}

func scriptEnv(srv *vcstest.Server, srvCertFile string) ([]string, error) {
	httpURL, err := url.Parse(srv.HTTP.URL)
	if err != nil {
		return nil, err
	}

	}
	maybeSkip(t)
	where, err := os.Getwd()
	if err != nil {
		t.Fatal(err)
	}
	defer func() {
		if err := os.Chdir(where); err != nil {
			t.Fatal(err)
		}
	}()
	if err := os.Chdir(filepath.Join(buildCtx.GOROOT, "src", "text")); err != nil {
		t.Fatal(err)
	}
	var b strings.Builder
	var flagSet flag.FlagSet