[cups.development] Request more explanation about printer query

Michael Sweet msweet at apple.com
Wed Sep 7 07:47:23 PDT 2011


Right, it is trying to get the make and model for driver matching - does your printer provide a 1284 device ID?

On Sep 6, 2011, at 9:10 PM, hao.chen at primax.com.cn wrote:

> Hi, Sir,
> 
> Thanks for your information. After check the query data, that looks like Mac query the language level and PS version. Enclosed is the captured file.
> 
> So, it is standard behavior in Mac OS, right?  
> 
> Thanks!
> 
> Best Regards!
> Hao
> 
> 
> On 9/6/11 10:32 PM, "Mike Sweet" <msweet at apple.com> wrote:
> 
> See:
> 
>     http://www.cups.org/documentation.php/spec-ppd.html <http://www.cups.org/documentation.php/spec-ppd.html> 
> 
> The APAutoSetupTool keyword is used on Mac OS X. If this isn't defined and the printer supports PostScript, a PostScript query job will be sent using the query commands defined in the PPD file.
> 
> Sent from my iPad
> 
> On Sep 6, 2011, at 4:25 AM, hao.chen at primax.com.cn wrote:
> 
> Hi, Sir,
> 
> Would you please explain which keyword is used to define the auto-setup utility? We checked our PPD file, that looks like no similar keyword was used.
> 
> That’s appreciated for your kindly support.
> 
> Thanks & Best Regards!
> Hao
> 
> 
> On 9/2/11 11:55 PM, "Michael Sweet" <msweet at apple.com> wrote:
> 
> This isn't CUPS doing the query.
> 
> On hot plug, an Apple system process (makequeues or makequeues_agent depending on the version) runs to add the printer if it hasn't been already.  If a compatible driver is found, the driver's auto-setup utility (defined in the PPD file) is run to query the printer and set any installable options, etc.  In the case of a PostScript printer, that query might be in the form of a PostScript query job using PJL if the PPD says to use it.
> 
> PS: Mac-specific questions are best posted to the Apple "printing" list.
> 
> On Sep 1, 2011, at 11:48 PM, hao.chen at primax.com.cn wrote:
> 
> Request more explanation about printer query 
> Dear Sir,
> 
> While one USB printer is connected to Mac OS 10.6 or Mac OS 10.7, CUPS will send out PJL query command to printer. Would you please explain the purpose? Where to get the definition or specification?
> 
> Thank & Best Regards!
> Hao 
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__________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair

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