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This recommendation depends on C11 Annex K being implemented. The following code can be added to remove this dependency:
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|---|---|---|
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#ifndef __STDC_LIB_EXT1__ typedef int errno_t; #endif |
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This compliant solution is categorized as a POSIX solution because it returns EINVAL and , which are defined by POSIX (IEEE Std 1003.1, 2013 Edition) but not by the C Standard.EIO
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Failing to test for error conditions can lead to vulnerabilities of varying severity. Declaring functions that return an errno with a return type of errno_t will not eliminate this problem but may reduce errors caused by programmers' misunderstanding the purpose of a return value.
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Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
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| CERT C++ Secure Coding Standard | DCL09-CPP. Declare functions that return errno with a return type of errno_t |
| ISO/IEC TR 24772:2013 | Ignored Error Status and Unhandled Exceptions [OYB] |
| MISRA C:2012 | Directive 1.1 (required) |
Bibliography
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