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|S )a% Return the proper 'dir' argument for tempfile functions.
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any cleaning that a distro boot might do on /tmp (such as
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If the caller of this function (mkdtemp or mkstemp) was provided
with a 'dir' argument, then that is respected.
@param odir: original 'dir' arg to 'mkdtemp' or other.
@param needs_exe: Boolean specifying whether or not exe permissions are
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