IEEE Standards Interpretation for IEEE Std 1003.1™-1990 IEEE Standard for Information Technology--Portable Operating System Interfaces (POSIX®)
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Interpretation Request #36
Topic: ENAMETOOLONG Relevant Sections: 220.127.116.11 Classification: No Change required.
Section 18.104.22.168 open() Errors - ENAMETOOLONG addresses the cases where the path argument exceeds the PATH_MAX limit. If the path argument does not start with a slash, path name resolution (as defined in section 2.3.6) can generate a path name that exceeds the system limit. Is ENAMETOOLONG also required? (Paul Wanish IBM)
No, the ENAMETOLONG error condition is not required for this case.
Rationale for Interpretation
The [ENAMETOOLONG] error condition refers to pathname arguments supplied to the implementation, not to any pathnames that might be internally generated by the implementation. Thus there is no requirement than an implementation fail if the length of such an implementation generated pathname exceeds PATH_MAX.