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* Mike Pall:

> Florian Weimer wrote:
>> Could you add ffi.seterrno(), too?  I think it's needed because there
>> are some C functions that cannot signal all errors if the original
>> errno value is non-zero (e.g. strtold()).
> I don't think there's a problem for strtol(), but the man page for
> errno mentions getpriority().

strtold(), not strtol(). 

> I've extended ffi.errno() to take an optional argument. See:

Thanks, that addresses my concern.