[Bug 50284] New: FSCTL_GET_REPARSE_POINT doesn't contain any target for a symbolic link

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50284

            Bug ID: 50284
           Summary: FSCTL_GET_REPARSE_POINT doesn't contain any target for
                    a symbolic link
           Product: Wine-staging
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: martin at martin.st
                CC: erich.e.hoover at gmail.com, leslie_alistair at hotmail.com,
                    z.figura12 at gmail.com
      Distribution: ---

Created attachment 68841
  --> https://bugs.winehq.org/attachment.cgi?id=68841
Test program

https://github.com/wine-staging/wine-staging/blob/fce121fcd95380ca56c9d027be8719f3b32e1b9a/patches/ntdll-Junction_Points/0011-ntdll-Add-support-for-reading-relative-symlinks.patch
does contain some support for reading relative symlinks, but it doesn't seem to
work currently; the SubstituteNameLength and PrintNameLength fields of
SymbolicLinkReparseBuffer are zero after a call to
DeviceIoControl(FSCTL_GET_REPARSE_POINT), see the attached test program.

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