[cups.general] reading data from raw printer

[Till Kamppeter]

Tim Waugh wrote:
>> http://localhost:631/help/spec-command.html
>> "Printer drivers advertise support for the CUPS command file format
>>  by providing a filter for the application/vnd.cups-command file type."
> 
> It just means you need a line in the PPD saying what filters to run for
> the command files.
> 
> The command interface has the potential to be really useful, not least
> for things like finding out ink levels.  It's just that no-one seems to
> be using it or understand how it works...

The thing missing is that you cannot query a print queue for the 
available commands. The PPD should contain a list of available commands 
and parameters. Then a client GUI could show a "Maintenance" button 
which pops up a dialog with widgets for sending commands.

    Till