Fwd: usb printer vs cups

[Hans Petter Selasky]

On 09/17/14 08:00, Andriy Gapon wrote:
>
> Soliciting help.
>
> -------- Forwarded Message --------
>
>>From my experience I think that cupsd executes backend tools with all uids and
> gids set to cups and no supplementary groups.  In the case of USB printers the
> backends need to access /dev/usbctl and /dev/usb/foobar that corresponds to a
> printer.  That means that the access to those devices must be somehow granted to
> cups:cups.
> How do people solve this?  What kind of permissions / configuration do you use?
>
> P.S.
> Maybe I over-generalized the issue to all USB printers.  My personal experience
> is with an HP printer handled by hplip / hplip-plugin.
>

Hi,

The /usr/ports/print/cups-base should be updated.

The pkg-message should not say that:


# FreeBSD 8.x
add path 'usb*' mode 0770 group cups
add path 'ugen*' mode 0660 group cups

add path 'usb/0.2.*' mode 0660 group cups

Is needed. This is wrong.

Instead make cups-base install the attached devd configuration file in 
/usr/local/etc/devd/ which does the needed chown for printers only.

--HPS
-------------- next part --------------
# Generic USB printer devices
notify 100 {
	match "system"		"USB";
	match "subsystem"	"INTERFACE";
	match "type"		"ATTACH";
	match "intclass"	"0x07";
	match "intsubclass"	"0x01";
	match "intprotocol"	"(0x01|0x02|0x03)";
	action "chown cups:cups /dev/$cdev";
};