On 12Apr.2019 0919, Jeroen Demeyer wrote:
> The signal handler (that receives signals from the OS) in Python starts
> with a check
> 
>     if (getpid() == main_pid)
> 
> Looking at the comments, the intent was to do a check for the main
> *thread* but this is checking the *process* id. So this condition is
> basically always true. Therefore, I suggest to remove it in
> https://bugs.python.org/issue36601
> 
> If you have any objections or comments, I suggest to post them to that bpo.

To add a little more context, the check was added about 25 years ago as
a "hack" for some reason that we can't figure out anymore.

So if you are a historian of ancient operating systems and know of one
that might have raised signal handlers in a different process from the
one where it was registered, we'd love to hear from you.

Cheers,
Steve
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