[sane-devel] Backend calibration data storage...

[Henning Meier-Geinitz]

Hi,

On Tue, Aug 19, 2003 at 02:39:37PM +0200, Gerhard Jaeger wrote:
> I remember, that there once was a discussion 'bout saving backend specific
> data somewhere, but I could not find this discussion anymore.
> My problem:
> I'd like to save calibration data from the devices locally, so that it is no
> longer necessary to redo calibration over and over again (at least for
> raw calibration this is always a time-intensive procedure).
> One solution is to keep this data only until the backend has been closed,
> this will be my fall-back solution, but the better one will be to save the
> calibration data on on the disc...
> Any comments? 

I'd use ~/.sane/some_unique_name, or, if you need more than one file,
~/.sane/backend_name/some_name. Better don't use /tmp, at least if you
can't make sure that someone else can do nasty things with your files
(e.g. symlink attack). Further more in /tmp, the file might be deleted
on the next boot.

Using ~/.sane means that the calibration is user-specific but I think
that's better than causing security nightmares in /tmp.

Bye,
  Henning