Fwd: [PATCH] kernel32: Make GetFinalPathNameByHandle warn on mounted folder.

[Jeff Smith]

On Mon, Sep 23, 2019 at 1:01 AM Zhiyi Zhang <zzhang(a)codeweavers.com> wrote:
> Hi Jeff,
>
> It would be better if you could add some tests for this.
> For example, add a test that shows the failures on wine
> and then next patch fix it and remove todo_wines.

I normally do add tests, but in this case I wasn't certain how to set
up a test that
relies on a particular system and wine configuration.

Specifically, this needs to be run on a path, on a mounted drive
without a mapped
drive letter, on a mounted drive with a mapped drive letter.  For
instance: Z: is
mapped to / and /home is a mount (but is not mapped to a drive letter) and the
test would operate on /home/jeff.
> And is this for winehq bug 47787?

Yes, though I wouldn't say it really addresses the issue, just makes
it a bit clearer
why it fails when it does.  I explained a bit further in bz (where I
link to the patch).
> Thanks,
> Zhiyi
>
> On 9/23/19 1:10 PM, Jeff Smith wrote:
> > GetFinalPathNameByHandle attempts to translate a volume mount point to
> > an NT volume name using QueryDosDevice, but this can only succeed if the
> > mount point is a drive letter.  When GetVolumeNameForVolumeMountPoint
> > encounters a similiar situation, it emits a fixme message.
> >
> > When attempting to translate a volume mount point to an NT volume name
> > with GetFinalPathNameByHandle, for a mount point that is not a drive
> > letter, emit a fixme message.
> >
> > Signed-off-by: Jeff Smith <whydoubt(a)gmail.com>
> > ---
> >  dlls/kernel32/file.c | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> >
> > diff --git a/dlls/kernel32/file.c b/dlls/kernel32/file.c
> > index 2b6a13fc0d..2d52b0a165 100644
> > --- a/dlls/kernel32/file.c
> > +++ b/dlls/kernel32/file.c
> > @@ -1442,6 +1442,14 @@ DWORD WINAPI GetFinalPathNameByHandleW(HANDLE file, LPWSTR path, DWORD charcount
> >      {
> >          WCHAR nt_prefix[MAX_PATH];
> >
> > +        /* if length of drive_part is > 3 then it must be a mounted folder */
> > +        if (drive_part_len > 3)
> > +        {
> > +            FIXME("Mounted Folders are not yet supported\n");
> > +            SetLastError( ERROR_NOT_A_REPARSE_POINT );
> > +            return 0;
> > +        }
> > +
> >          /* QueryDosDeviceW sets error code on failure */
> >          drive_part[drive_part_len - 1] = 0;
> >          if (!QueryDosDeviceW( drive_part, nt_prefix, MAX_PATH ))