On 12.09.2014 20:53, Andriy Gapon wrote:

 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
How do people solve this?  What kind of permissions / configuration do you use?


Maybe I over-generalized the issue to all USB printers.  My personal experience
is with an HP printer handled by hplip / hplip-plugin.

Personally I prefer using stock lpd for those, it can be easily integrated with foomatic hpijs.

Sphinx of black quartz judge my vow.
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