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_
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