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- Subject: Re: My program doesn't speak Portugese!
- From: Coda Highland <chighland@...>
- Date: Thu, 25 Feb 2016 15:38:52 -0800
On Thu, Feb 25, 2016 at 3:28 PM, David Given <email@example.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:
> 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.