Function read

src/io.cpp:53–69

Future<size_t> read(int_fd fd, void* data, size_t size)
{
  process::initialize();

  // Check the file descriptor.
  Try<bool> async = is_async(fd);
  if (async.isError()) {
    // The file descriptor is not valid (e.g., has been closed).
    return Failure(
        "Failed to check if file descriptor was asynchronous: " +
        async.error());
  } else if (!async.get()) {
    return Failure("Expected an asynchronous file descriptor.");
  }

  return internal::read(fd, data, size);
}


Future<size_t> write(int_fd fd, const void* data, size_t size)