* dtable.cc (cygwin_attach_handle_to_fd): Default to implicit bin mode if none

specified.
* fhandler.cc (fhandler_base::init): Make bin argument a guarantee rather than
a suggestion.
* path.cc (path_conv::check): Load flag returned from cygwin_conv_to_win32_path
into path_flags.

winsup/cygwin/dtable.cc

@@ -206,7 +206,7 @@ cygwin_attach_handle_to_fd (char *name, int fd, HANDLE handle, mode_t bin,
   path_conv pc;
   fhandler_base *res = cygheap->fdtab.build_fhandler_from_name (fd, name, handle,
 								pc);
-  res->init (handle, myaccess, bin);
+  res->init (handle, myaccess, bin ?: pc.binmode ());
   return fd;
 }