> > What *won't* happen is, you won't get side effects from opening
> > your serial ports (you'd have to open them without O_DIRECTORY
> > to get that) so that seems like a little step forward.
>
> As already said: depending on O_DIRECTORY breaks POSIX compliance
> and that alone should kill this idea...
What really kills that idea is the fact that you can trick applications
into opening your serial ports _without_ O_DIRECTORY.
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