// Errno values.
const (
	errnoERROR_IO_PENDING = 997
)

var (
	errERROR_IO_PENDING error = Errno(errnoERROR_IO_PENDING)
	errERROR_EINVAL     error = EINVAL
)

// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e Errno) error {
	switch e {
	case 0:
		return errERROR_EINVAL
	case errnoERROR_IO_PENDING:
		return errERROR_IO_PENDING
	}

)

var ZosTraceLevel int
var ZosTracefile *os.File

var (
	signalNameMapOnce sync.Once
	signalNameMap     map[string]syscall.Signal
)

// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e Errno) error {
	switch e {
	case 0:
		return nil
	case EAGAIN:
		return errEAGAIN
	case EINVAL:
		return errEINVAL

        ...