[MLton-devel] Posix.FileSys.pathconf

[Stephen Weeks]

The spec for Posix.FileSys.pathconf says that boolean values should be
encoded as SOME 0 or SOME 1.  This implies that 

	pathconf (..., "SYNC_IO")

should never return NONE.  However, on Linux, Poly/ML, SML/NJ, and
(the latest internal version of) MLton do return NONE for such a call.
This happens because pathconf returns -1 and leaves errno alone.
Maybe this should be considered as a bug in Linux?  Or is the correct
thing to change the spec to encode true as SOME 1 and false as NONE?



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