Re: Why does (stat() ?) open files ?

[Corinna Vinschen <corinna-cygwin at cygwin dot com>]

On Apr  9 14:12, Ben RUBSON wrote:
> On 09 Apr 2018 12:52, Corinna Vinschen wrote:
> > It's nice that you're testing all this, but you should ask *why* Cygwin
> > does it in the first place.  The reason is that the information one can
> > gather without opening the file on Windows is insufficient to fill in
> > all of the stat struct.  The directory info returned by
> > NtQueryDirectoryFile just isn't, thus it's only a fallback.
> 
> Corinna, thank you very much for your answer.
> What info would be missing without opening the file ?
> 
> Do you know where the open call could come from, when only using
> NtQueryDirectoryFile in symlink_info::check() ?
> (certainly related to the previous question)

NtQueryDirectoryFile requires an open directory handle of course.
NtOpenFile on the dir is called a few lines prior to NtQueryDirectoryFile.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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