Libinklevel is a library for checking the ink level of your printer on a system which runs Linux. It supports printers attached via parallel port or usb.
I downloaded and installed the latest versions of that and a complementary command-line tool called ink (uses libinklevel and is from the same author). No luck with my Canon i950 printer:
marc@tbird:~/sw/libinklevel-0.7.2$ sudo ink -p usb ink v0.4.1 © 2007 Markus Heinz Printer not supported. Could not get ink level.
After a few minutes of glancing at the code, I was able to get it working. Here’s the patch. Now the output of the ink tool looks like this:
marc@tbird:~/sw/libinklevel-0.7.2$ sudo ink -p usb ink v0.4.1 © 2007 Markus Heinz Canon i950 Cyan: 40% Light Cyan: 100% Black: 10% Yellow: 70% Magenta: 10% Light Magenta: 100%
While I was modifying the code, I noticed that there was a
#define constant called
MAX\_NUMBER\_OF\_MODELS, that needed to be updated whenever one adds or removes printers to the
existingPrinters array. This was a little cumbersome, so I modified the code to not need that. Here’s the patch.
I will of course send these patches to the author, Markus Heinz, so that the Canon i950 can work “out of the box” with the next version of libinklevel.