On 12.04.2019 21:05, Steve Dower wrote: > 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. According to https://www.linuxquestions.org/questions/programming-9/the-return-value-of-getpid-called-from-main-thread-and-new-thread-r-identical-624399/ , threads used to have different PIDs in the 2.4 Linux kernel. > Cheers, > Steve > _______________________________________________ > Python-Dev mailing list > Python-Dev at python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: https://mail.python.org/mailman/options/python-dev/vano%40mail.mipt.ru -- Regards, Ivan
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