# Boost :

Subject: Re: [boost] filesystem::create_directories error
From: Ilie Halip (lupuroshu_at_[hidden])
Date: 2010-03-24 06:04:44

On Wed, Mar 24, 2010 at 12:42 AM, Zachary Turner <divisortheory_at_[hidden]>wrote:

> I'm trying to use boost::filesystem::create_directories() with a path of
> the
> form \\?\Volume{Guid}\foo on windows. This seems to break the filesystem
> library because it doesn't understand the path syntax. when recursing up
> the parents it removes the slash at each level, so it ends up calling
> boost::filesystem::exists(L"\\?\Volume{Guid}") which always returns false,
> I
> think because GetFileAttributes() requires that paths in this syntax end
> with a trailing \, whereas the trailing \ has been removed.
>
> I'm tempted to fix this, but I'm sure this algorithm is fragile and any
> change I apply is likely to break another case. Does anyone have any
> suggestions on how to fix this?
>
> Thanks
> _______________________________________________
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>

That's right. With this simple test:

char volPath[MAX_PATH] = {0};
char *volMount = "C:\\";
GetVolumeNameForVolumeMountPointA(volMount, volPath, MAX_PATH);
strcat(volPath, "foo\\");
fs::create_directories(volPath);

, it fails, because, when checking the parent dir, it removes the trailing
\.

Also, this is related to https://svn.boost.org/trac/boost/ticket/2138

Ilie.