A question for Rule21.8

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A question for Rule21.8

Post by tsukukazu » Mon Jul 14, 2014 7:28 am


I have a question about rule 21.8.

_Exit Function that were added in C99 also has implementation-defined behavior.

Is this not included?

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Kazuhiro Tsukushiro

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Re: A question for Rule21.8

Post by misra-c » Mon Aug 11, 2014 8:30 am

It was a conscious decision not to include _Exit in this rule. _Exit() differs from exit() in that no atexit-registered handlers are called prior to program termination. This means that the undefined behaviour that can occur with exit() isn't possible with _Exit().

The implementation-defined behaviour remains a possibility (e.g. the status code returned to the environment, whether temporary files are deleted or not, whether streams are flushed and/or closed) but this was considered not to be a strong enough reason to ban _Exit().
Posted by and on behalf of
the MISRA C Working Group

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