[Python-Dev] Updates to PEP 471, the os.scandir() proposal

[Ethan Furman]

On 07/09/2014 10:10 AM, Paul Moore wrote:
> On 9 July 2014 14:22, Ben Hoyt <benhoyt at gmail.com> wrote:
>> One issue with option #2 that I just realized -- does scandir yield
>> the entry at all if there's a stat error? It can't really, because the
>> caller will except the .lstat attribute to be set (assuming he asked
>> for type='lstat') but it won't be. Is effectively removing these
>> entries just because the stat failed a problem? I kind of think it is.
>> If so, is there a way to solve it with option #2?
>
> So the issue is that you need to do a stat but it failed. You have
> "whatever the OS gave you", but can't get anything more. This is only
> an issue on POSIX, where the original OS call doesn't give you
> everything, so it's fine, those POSIX people can just learn to cope
> with their broken OS, right? :-)

LOL


> More seriously, why not just return a DirEntry that says it's a file
> with a stat entry that's all zeroes? That seems pretty harmless. And
> the onerror function will be called, so if it is inappropriate the
> application can do something. Maybe it's worth letting onerror return
> a boolean that says whether to skip the entry, but that's as far as
> I'd bother going.

I could live with this -- we could enhance it the future fairly easily if we needed to.

--
~Ethan~