}
}

// Test that error values are negative.
// Use a misaligned pointer to get -EINVAL.
func TestMincoreErrorSign(t *testing.T) {
	var dst byte
	v := Mincore(unsafe.Add(unsafe.Pointer(new(int32)), 1), 1, &dst)

	const EINVAL = 0x16
	if v != -EINVAL {
		t.Errorf("mincore = %v, want %v", v, -EINVAL)
	}
}

func TestKernelStructSize(t *testing.T) {

			systemstack(func() {
				ret = callCgoSigaction(uintptr(sig), new, old)
			})
		}

		const EINVAL = 22
		if ret == EINVAL {
			// libc reserves certain signals — normally 32-33 — for pthreads, and
			// returns EINVAL for sigaction calls on those signals.  If we get EINVAL,
			// fall back to making the syscall directly.
			sysSigaction(sig, new, old)
		}
	}

	if msanenabled && old != nil {

func (c *TCPConn) SyscallConn() (syscall.RawConn, error) {
	if !c.ok() {
		return nil, syscall.EINVAL
	}
	return newRawConn(c.fd), nil
}

// ReadFrom implements the [io.ReaderFrom] ReadFrom method.
func (c *TCPConn) ReadFrom(r io.Reader) (int64, error) {
	if !c.ok() {
		return 0, syscall.EINVAL
	}
	n, err := c.readFrom(r)
	if err != nil && err != io.EOF {

// SO_PASSCRED option must be enabled on the socket.
func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) {
	if m.Header.Level != SOL_SOCKET {
		return nil, EINVAL
	}
	if m.Header.Type != SCM_CREDENTIALS {
		return nil, EINVAL
	}
	ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
	return &ucred, nil
}

// PktInfo4 encodes Inet4Pktinfo into a socket control message of type IP_PKTINFO.

			// User lacks permission: either the call requires root permission and the
			// user is not root, or the call is denied by a container security policy.
			return true
		case syscall.EINVAL:
			// Some containers return EINVAL instead of EPERM if a system call is
			// denied by security policy.
			return true
		}
	}

	if errors.Is(err, fs.ErrPermission) || errors.Is(err, errors.ErrUnsupported) {
		return true
	}

		return nil, 0, EINVAL
	}
	sa.raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL
	sa.raw.Family = AF_UNIX
	for i := 0; i < n; i++ {
		sa.raw.Path[i] = int8(name[i])
	}
	return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
}

func (sa *SockaddrDatalink) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Index == 0 {
		return nil, 0, EINVAL
	}
	sa.raw.Len = sa.Len

		return nil, 0, EINVAL
	}
	sa.raw.Len = byte(3 + n) // 2 for Family, Len; 1 for NUL
	sa.raw.Family = AF_UNIX
	for i := 0; i < n; i++ {
		sa.raw.Path[i] = int8(name[i])
	}
	return unsafe.Pointer(&sa.raw), _Socklen(sa.raw.Len), nil
}

func (sa *SockaddrDatalink) sockaddr() (unsafe.Pointer, _Socklen, error) {
	if sa.Index == 0 {
		return nil, 0, EINVAL
	}
	sa.raw.Len = sa.Len

func (p *Process) release() error {
	// Drop the Process' reference and mark handle unusable for
	// future calls.
	//
	// The API on Windows expects EINVAL if Release is called multiple
	// times.
	if old := p.handlePersistentRelease(statusReleased); old == statusReleased {
		return syscall.EINVAL
	}

	// no need for a finalizer anymore
	runtime.SetFinalizer(p, nil)
	return nil
}

func (p *Process) closeHandle() {

		if n > 0 {
			pos += int64(n)
			written += int64(n)
			remain -= int64(n)
		}
		if err == syscall.EINTR {
			continue
		}
		// This includes syscall.ENOSYS (no kernel
		// support) and syscall.EINVAL (fd types which
		// don't implement sendfile), and other errors.
		// We should end the loop when there is no error
		// returned from sendfile(2) or it is not a retryable error.
		if err != syscall.EAGAIN {
			break
		}

	}
	fd.Close()
	return nil, syscall.EINVAL
}

func fileListener(f *os.File) (Listener, error) {
	fd, err := newFileFD(f)
	if err != nil {
		return nil, err
	}
	switch laddr := fd.laddr.(type) {
	case *TCPAddr:
		return &TCPListener{fd: fd}, nil
	case *UnixAddr:
		return &UnixListener{fd: fd, path: laddr.Name, unlink: false}, nil
	}
	fd.Close()
	return nil, syscall.EINVAL
}