[Bug 17758] New: GetFileAttributesExW accepts unix paths

http://bugs.winehq.org/show_bug.cgi?id=17758

Summary: GetFileAttributesExW accepts unix paths
           Product: Wine
           Version: 1.1.17
          Platform: Other
               URL: http://www.python.org/ftp/python/3.0.1/python-3.0.1.msi
        OS/Version: other
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: kernel32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

GetFileAttributesExW("/bin/sh") succeeds if /bin is mapped. Some of python's
tests use this check to decide whether it's running on a Unix system. It then
tries to start a subprocess using /bin/sh and read its output; this does not
work because Wine processes cannot read the output of non-Wine processes.

In python's case, this is harmless and only results in a few test failures.

Files should not be accessible to Windows programs by their Unix paths. We
wouldn't want them to think /bin/sh is actually useful.