// pidfdFind. Return ECHILD for consistency with what the wait
		// syscall would return.
		return nil, NewSyscallError("wait", syscall.ECHILD)
	case statusReleased:
		return nil, syscall.EINVAL
	}
	defer p.handleTransientRelease()

	var (
		info   unix.SiginfoChild
		rusage syscall.Rusage
		e      syscall.Errno
	)
	for {

	select {
	case result, ok := <-listener.acceptCh:
		if ok {
			return result.conn, result.err
		}
	case <-listener.ctx.Done():
	}
	return nil, syscall.EINVAL
}

// Close - closes underneath all TCP listeners.
func (listener *httpListener) Close() (err error) {
	listener.ctxCanceler()

	for i := range listener.listeners {
		listener.listeners[i].Close()
	}

		return nil
	}

	// The rmdir system call does not permit removing ".",
	// so we don't permit it either.
	if endsWithDot(path) {
		return &PathError{Op: "RemoveAll", Path: path, Err: syscall.EINVAL}
	}

	// Simple case: if Remove works, we're done.
	err := Remove(path)
	if err == nil || IsNotExist(err) {
		return nil
	}

	// RemoveAll recurses by deleting the path base from
	// its parent directory

		// descriptor to scan the directory again.
		if offset == 0 && whence == 0 {
			fd.Dircookie = 0
			return 0, nil
		} else {
			return 0, syscall.EINVAL
		}
	}

	return syscall.Seek(fd.Sysfd, offset, whence)
}

// https://github.com/WebAssembly/WASI/blob/main/legacy/preview1/docs.md#-dirent-record
const sizeOfDirent = 24

	cmd.SysProcAttr = &syscall.SysProcAttr{
		UseCgroupFD: true,
		CgroupFD:    fd,
	}
	out, err := cmd.CombinedOutput()
	if err != nil {
		if testenv.SyscallIsNotSupported(err) && !errors.Is(err, syscall.EINVAL) {
			// Can be one of:
			// - clone3 not supported (old kernel);
			// - clone3 not allowed (by e.g. seccomp);
			// - lack of CAP_SYS_ADMIN.
			t.Skipf("clone3 with CLONE_INTO_CGROUP not available: %v", err)
		}

	}

	_, e := C.g()
	if e != syscall.E2BIG {
		t.Errorf("got %q, expect %q", e, syscall.E2BIG)
	}
	_, e = C.g2(C.EINVAL, C._expA, C._expB, C._expC, C._expD)
	if e != syscall.EINVAL {
		t.Errorf("got %q, expect %q", e, syscall.EINVAL)
	}
}

// issue 3945

func testPrintf(t *testing.T) {
	C.say()
}

// issue 4054

// IsRestricted reports whether the access token t is a restricted token.
func (t Token) IsRestricted() (isRestricted bool, err error) {
	isRestricted, err = isTokenRestricted(t)
	if !isRestricted && err == syscall.EINVAL {
		// If err is EINVAL, this returned ERROR_SUCCESS indicating a non-restricted token.
		err = nil
	}
	return
}

const (
	WTS_CONSOLE_CONNECT        = 0x1
	WTS_CONSOLE_DISCONNECT     = 0x2

func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }

//sysnb pipe(p *[2]int32) (err error)

func Pipe(p []int) (err error) {
	if len(p) != 2 {
		return EINVAL
	}
	var q [2]int32
	err = pipe(&q)
	if err == nil {
		p[0] = int(q[0])
		p[1] = int(q[1])
	}
	return
}

func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
	var _p0 unsafe.Pointer

	// can not call Release, as Wait does not set p.Pid = -1.
	//
	// On Unix and Plan 9, calling Release a second time has no effect.
	//
	// On Windows, calling Release a second time returns EINVAL.
	return p.release()
}

// Kill causes the [Process] to exit immediately. Kill does not wait until
// the Process has actually exited. This only kills the Process itself,

	{17, "EEXIST", "file exists"},
	{18, "EXDEV", "invalid cross-device link"},
	{19, "ENODEV", "no such device"},
	{20, "ENOTDIR", "not a directory"},
	{21, "EISDIR", "is a directory"},
	{22, "EINVAL", "invalid argument"},
	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},