*
 * <p>When this stream creates a temporary file, it restricts the file's permissions to the current
 * user or, in the case of Android, the current app. If that is not possible (as is the case under
 * the very old Android Ice Cream Sandwich release), then this stream throws an exception instead of
 * creating a file that would be more accessible. (This behavior is new in Guava 32.0.0. Previous

### Crea una clase `Enum`

Importa `Enum` y crea una sub-clase que herede desde `str` y desde `Enum`.

Al heredar desde `str` la documentación de la API podrá saber que los valores deben ser de tipo `string` y podrá mostrarlos correctamente.

Luego crea atributos de clase con valores fijos, que serán los valores disponibles válidos:

	case syscall.O_WRONLY:
		access = syscall.GENERIC_WRITE
	case syscall.O_RDWR:
		fallthrough
	case syscall.O_RDWR | syscall.O_CREAT:
		fallthrough
	case syscall.O_WRONLY | syscall.O_CREAT:
		access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
	case syscall.O_WRONLY | syscall.O_CREAT | syscall.O_APPEND:
		access = syscall.FILE_APPEND_DATA
	default:
		return nil, fmt.Errorf("Unsupported flag (%d)", flag)
	}

        // openFunction
        if ( ( flags & SmbConstants.O_TRUNC ) == SmbConstants.O_TRUNC ) {
            // truncate the file
            if ( ( flags & SmbConstants.O_CREAT ) == SmbConstants.O_CREAT ) {
                // create it if necessary
                this.openFunction = OPEN_FN_TRUNC | OPEN_FN_CREATE;
            }
            else {
                this.openFunction = OPEN_FN_TRUNC;

    * Pero te proporciona las herramientas para crear aplicaciones web simples, con <abbr title="también conocido en español como: enrutamiento">routing</abbr> basado en <abbr title="tambien conocido en español como: rutas">paths</abbr>, etc.

            if(( flags & SmbFile.O_CREAT ) == SmbFile.O_CREAT ) {
                // create it if necessary
                openFunction = OPEN_FN_TRUNC | OPEN_FN_CREATE;
            } else {
                openFunction = OPEN_FN_TRUNC;
            }
        } else {
            // don't truncate the file
            if(( flags & SmbFile.O_CREAT ) == SmbFile.O_CREAT ) {
                // create it if necessary

            if(( flags & SmbFile.O_CREAT ) == SmbFile.O_CREAT ) {
                // create it if necessary
                createDisposition = FILE_OVERWRITE_IF;
            } else {
                createDisposition = FILE_OVERWRITE;
            }
        } else {
            // don't truncate the file
            if(( flags & SmbFile.O_CREAT ) == SmbFile.O_CREAT ) {
                // create it if necessary

        // createDisposition
        if ( ( flags & SmbConstants.O_TRUNC ) == SmbConstants.O_TRUNC ) {
            // truncate the file
            if ( ( flags & SmbConstants.O_CREAT ) == SmbConstants.O_CREAT ) {
                // create it if necessary
                this.createDisposition = FILE_OVERWRITE_IF;
            }
            else {
                this.createDisposition = FILE_OVERWRITE;

	switch flag {
	case syscall.O_RDONLY:
		lockType = syscall.F_RDLCK
	case syscall.O_WRONLY:
		fallthrough
	case syscall.O_RDWR:
		fallthrough
	case syscall.O_WRONLY | syscall.O_CREAT:
		fallthrough
	case syscall.O_RDWR | syscall.O_CREAT:
		lockType = syscall.F_WRLCK
	default:
		return nil, &os.PathError{
			Op:   "open",
			Path: path,
			Err:  syscall.EINVAL,
		}
	}

	lock := syscall.Flock_t{

  // When creating file, use the same permissions as original
  mode_t open_mode = mode & (S_IRWXU | S_IRWXG | S_IRWXO);

  // O_WRONLY | O_CREAT | O_TRUNC:
  //   Open file for write and if file does not exist, create the file.
  //   If file exists, truncate its size to 0.
  int dst_fd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, open_mode);
  if (dst_fd < 0) {
    close(src_fd);
    return -1;
  }