[cups.development] detect printer status

[Berend De Schouwer]

On 29/03/2011 13:18, bui wrote:
> Hi,
>
> I am writing a Qt program to control a USB printer. How can I detect the printer status (just display the online-offline status)? When I use IPP API to querry the printer state, it always return: printerstate is idle.
>
> When I turn on and turn off the printer, the kernel display notify message about usblp (I am using CUPS 1.3.9), so I think there must be a way to detect the on-off status of the printer using CUPS API, but I can not find it until now.

I think the Cups service only updates when it tries to print -- not when
it's idle.

Try turn the printer off, then print something, then query the status.


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