On 19 Jan 2016, at 18:54, ataro <ataro_at_protonmail.ch> wrote:

> Both could have explained it better. In most cases a function will
> document with which of its return values errno has been set and so it
> may not be necessary to set errno to 0 beforehand. In this case though
> you must.

I believe it is legal for functions to set errno but not return an
error though I have no idea whether libcurl or anything it
calls might do this. errno can only be trusted if an error is
returned.

-- 
Alex Bligh
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