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Such a thing as C program exit hook ?
I'm writing a library to collect some usage statistics, and it needs to be printed just before the program exists. Is there a way to call a function or a piece of code when the program is about to exit/terminate ? It's ok if the data is not printed during unusual circumstances like program crashes, but I want to print it just before normal termination of the code. Another restriction is that the data should be printed without requiring the library users to call it explicitly.
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