Re: My program doesn't speak Portugese!

[Coda Highland <chighland@...>]

On Thu, Feb 25, 2016 at 3:28 PM, David Given <dg@cowlark.com> wrote:
> On 23/02/16 22:33, Luke Drummond wrote:
> [...]
>> `io.open` returns `errno` as its 3rd return value
>
> That is, unfortunately, not documented. Can I rely on it?
>
> There's also a more subtle problem --- errnos aren't very standardised.
> Luckily, the low-value ones are usually the same across platforms (I
> need to support Windows *and* Linux *and* BSD *and* OSX). ENOENT seems
> to be 2 on most. I found a handy table:
>
> http://www.ioplex.com/~miallen/errcmp.html
>
> Shame there isn't a portable way of converting an errno to an identifier
> string and back...
>
> --
> ┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ───── http://www.cowlark.com ─────
> │ "There is nothing in the world so dangerous --- and I mean *nothing*
> │ --- as a children's story that happens to be true." --- Master Li Kao,
> │ _The Bridge of Birds_
>

As mentioned elsewhere in the thread, it actually IS documented, just
not very obviously, and the manual contains a slight contradiction
that probably ought to be fixed.

/s/ Adam