Method from_child_stdout_fd

be/src/kudu/util/subprocess.h:164–164

  // Stream should not be disabled or shared.
  int to_child_stdin_fd()    const { return CheckAndOffer(STDIN_FILENO); }
  int from_child_stdout_fd() const { return CheckAndOffer(STDOUT_FILENO); }
  int from_child_stderr_fd() const { return CheckAndOffer(STDERR_FILENO); }

  // Release control of the file descriptor for the child's stream, only if piped.