[sane-devel] ICC support for SANE

[Julien BLACHE]

"m. allan noah" <kitno455 at gmail.com> wrote:

Hi,

> 1. I dont think the connection port matters, and particularly with usb
> devices, that information can change every time the machine reboots.
> It is also not universally exposed in the SANE_Device struct, since
> some drivers put other unique info in that spot.
>
> 2. I think the serial number matters, but you usually wont get it.
> Many machines cannot report their serial numbers, and so the driver
> cannot give it to you.

To put it in a nutshell: uniquely identifying a scanner, don't count
on it. If it was doable, we would have done so loooooong ago already.

Fact is, USB scanners reporting a serial number at the USB level are
the exception. And as Allan wrote already, even otherwise, not a lot
of machines expose a serial number. Manufacturers just don't care,
except on high-end machines.

JB.

-- 
Julien BLACHE                                   <http://www.jblache.org> 
<jb at jblache.org>                                  GPG KeyID 0xF5D65169