ShellScript baseScript = ShellScript.builder().printEnvironmentVariable('FOOBAR').printWorkingDir().writeTo(testDirectory, "test")

    def setup() {
        testDirectory.createDir(pwd)
    }


    static String getPwd() {
        return "tmp"
    }

    abstract static class VarInitializer {
        final String description

        VarInitializer(String description) {
            this.description = description
        }

var getwdCache struct {
	sync.Mutex
	dir string
}

// Getwd returns a rooted path name corresponding to the
// current directory. If the current directory can be
// reached via multiple paths (due to symbolic links),
// Getwd may return any one of them.
func Getwd() (dir string, err error) {
	if runtime.GOOS == "windows" || runtime.GOOS == "plan9" {
		return syscall.Getwd()
	}

	// Clumsy but widespread kludge:

	return "", ENOSYS
}

const ImplementsGetwd = true

func Getwd() (wd string, err error) {
	var buf [PathMax]byte
	n, err := Getcwd(buf[0:])
	if err != nil {
		return "", err
	}
	return string(buf[:n]), nil
}

func Getuid() int {
	return jsProcess.Call("getuid").Int()
}

func Getgid() int {
	return jsProcess.Call("getgid").Int()
}

func Geteuid() int {

}

func getcwd() (string, error) {
	if !syscall.ImplementsGetwd {
		return "", nil
	}
	// Use the syscall to get the current working directory.
	// This is imperative for checking for OS thread state
	// after an unshare since os.Getwd might just check the
	// environment, or use some other mechanism.
	var buf [4096]byte
	n, err := syscall.Getcwd(buf[:])
	if err != nil {
		return "", err
	}

	if err = getsockname(fd, &rsa, &len); err != nil {
		return
	}
	return anyToSockaddr(fd, &rsa)
}

//sys	getcwd(buf []byte) (err error)

const ImplementsGetwd = true

func Getwd() (ret string, err error) {
	for len := uint64(4096); ; len *= 2 {
		b := make([]byte, len)
		err := getcwd(b)
		if err == nil {
			i := 0
			for b[i] != 0 {
				i++
			}
			return string(b[0:i]), nil
		}

		return
	}
	return anyToSockaddr(&rsa)
}

const ImplementsGetwd = true

//sys	Getcwd(buf []byte) (n int, err error)

func Getwd() (wd string, err error) {
	var buf [PathMax]byte
	// Getcwd will return an error if it failed for any reason.
	_, err = Getcwd(buf[0:])
	if err != nil {
		return "", err
	}
	n := clen(buf[:])
	if n < 1 {
		return "", EINVAL
	}

func Unlinkat(dirfd int, path string) (err error) {
	return unlinkat(dirfd, path, 0)
}

//sys	getcwd(buf *byte, size uint64) (err error)

const ImplementsGetwd = true

func Getwd() (ret string, err error) {
	for len := uint64(4096); ; len *= 2 {
		b := make([]byte, len)
		err := getcwd(&b[0], len)
		if err == nil {
			i := 0
			for b[i] != 0 {
				i++
			}
			return string(b[0:i]), nil

			}
			switch err {
			case syscall.EPERM, syscall.EINVAL:
			default:
				t.Fatalf("WriteMsgUnix failed with %v, want EPERM or EINVAL", err)
			}
		}

		ucred.Pid = int32(os.Getpid())
		ucred.Uid = uint32(os.Getuid())
		ucred.Gid = uint32(os.Getgid())
		oob := syscall.UnixCredentials(&ucred)

		// On SOCK_STREAM, this is internally going to send a dummy byte
		n, oobn, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)

	keys = make([]string, 0, len(envs))
	for k := range envs {
		keys = append(keys, k)
	}
	slices.Sort(keys)
	for _, key := range keys {
		fmt.Printf("env-%s=%s\r\n", key, envs[key])
	}

	cwd, _ := os.Getwd()
	fmt.Printf("cwd=%s\r\n", cwd)
}

type neverEnding byte

func (b neverEnding) Read(p []byte) (n int, err error) {
	for i := range p {
		p[i] = byte(b)
	}
	return len(p), nil
}

	Goroutines int    `json:"goroutines"`
}

func getProcInfo() *procInfo {
	pi := procInfo{
		Egid:       os.Getegid(),
		Euid:       os.Geteuid(),
		GID:        os.Getgid(),
		Pid:        os.Getpid(),
		Ppid:       os.Getppid(),
		UID:        os.Getuid(),
		TempDir:    os.TempDir(),
		Goroutines: runtime.NumGoroutine(),
	}

	pi.Groups, _ = os.Getgroups()
	pi.Wd, _ = os.Hostname()
	pi.Hostname, _ = os.Hostname()