Thank you for your answer.
Unfortunately I did not find any help on that page. It's written that
Not all platforms automatically reinstall their (native) signal handlers after a signal delivery. This means that the handler works only the first time the signal is sent. The solution to this problem is to use POSIX signal handlers if available, their behaviour is well-defined.

But the attached example did not work any better. Same problem and error :/

In reply to Re^2: How to create private signals? (or block interruption) by rapide
in thread How to create private signals? (or block interruption) by rapide

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