Improving error reporting from backends

[Michael Sweet]

Erik de Castro Lopo wrote:
> Michael Sweet wrote:
>> STATE: messages can be written by the backend to report conditions
>> like this.
> 
> Sorry, I'm rather new to CUPS and that was just a little terse for me.

"man backend", "man filter", http://localhost:631/help, and look at
RFC 2911.

> Do you mean that in the backend I can do things like:
> 
>    fprintf (stderr, "STATE : Out of paper.\n") ;
> 
> and CUPS will pick it up for retrieval using the printer-state-reasons attribute?

Yes, but you need to use the registered keywords/names, like:

     STATE: media-tray-empty-error
     STATE: media-tray-low-warning

-- 
______________________________________________________________________
Michael Sweet, Easy Software Products           mike at easysw dot com
Internet Printing and Document Software          http://www.easysw.com