When developing new code, declare functions that return errno with a return type of errno_t. Many existing functions that return errno are declared as returning a value of type int. It is semantically unclear by inspecting the function declaration or prototype if these functions return an error status or a value or, worse, some combination of the two. (See ERR02-C. Avoid in-band error indicators.)
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This recommendation depends on C11 Annex K being implemented and advocates using errno_t in new code where appropriate. The following code can be added to remove this dependency:
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#ifndef __STDC_LIB_EXT1__ typedef int errno_t; #endif |
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