I can no longer count on getting trustworthy answers to this kind of question on Stack Overflow, so let's try here instead. I need a *C language lawyer* to look at the functions `parse_exit_notif` and `marshal_exit_notif` at the bottom of this file and tell me whether the double casts are necessary. Note that the portability baseline for this code is C1999 + POSIX.1-2001 so if any relevant rules changed after that point please be explicit about what changed and when.