6867101: Path.checkAccess fails with sharing violation on special files such as pagefile.sys

[Xueming Shen]

Looks fine. Did not know the FindFirstFile can do the trick.  _wstati64 
was used to workaround the
getLength for pagefile.sys and hiberfil.sys in WinNTFileSystem_md.c.

Sherman

Alan Bateman wrote:
> Sherman - do you mind reviewing this one?
>
> Applications on Windows periodically encounter system files such as 
> those to support paging or hibernation that aren't intended to be 
> accessed by regular applications. Attempts to access such files 
> typically fails with a sharing violation, confusing convenience 
> methods such as "exists" as they can't confirm the existence of the 
> file. This patch adds a fallback to read the attributes via a 
> directory search.
>    http://cr.openjdk.java.net/~alanb/6867101/webrev.00/
>
> Thanks,
> Alan.