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Full Discussion: How to prevent queues from disabling themselves
Top Forums UNIX for Dummies Questions & Answers How to prevent queues from disabling themselves Post 302582545 by EatenByAGrue on Friday 16th of December 2011 10:00:28 AM
Old 12-16-2011
Quote:
Originally Posted by methyl
How is a sample printer wired into the network? Is there a print server involved?
How was the print queue configured?
What sort of printer?

Do you have an existing method for detecting whether the printer is not available due to power down as distinct from say out of paper?


It's fairly easy to write an alert mechanism to detect a stale print queue (at say 15 minute intervals).
Just look at the age of the newest file in /usr/spool/lp/request/<printer> . Avoid using "lpstat" because this can be very slow when printers have been powered off.
The ones that are presenting themselves as problems right now are all 3rd party warehouse computers that use a VPN to connect to our network. They accept and process orders and then disconnect. the queue is defined as "remote". The printer is connected to a windows computer. In SAM its defined as "HPLJ4250 on SOMECOMPUTER". And the printers are all HP LaserJets. I'm not sure if there's a JetDirect card attached.

We don't have an existing method for detecting if the printer is down at all. Well except for the user opening a problem ticket. I figure there MUST be a better way.

Thanks for your help.
 

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LEARN ABOUT SUNOS

enable

enable(1)							   User Commands							 enable(1)

NAME

       enable, disable - enable/disable LP printers

SYNOPSIS

       /usr/bin/enable printer...

       /usr/bin/disable [-c | -W]  [ -r [reason]] printer...

DESCRIPTION

       The  enable  command  activates	printers,  enabling  them to print requests submitted by the lp command. enable must be run on the printer
       server.

       The disable command deactivates printers, disabling them from printing requests submitted by the lp command. By default, any requests  that
       are  currently  printing  on printer will be reprinted in their entirety either on printer or another member of the same class of printers.
       The disable command must be run on the print server.

       Use lpstat -p to check the status of printers.

       enable and disable only effect queueing on the print server's spooling system. Executing these commands from a client system will  have	no
       effect on the server.

OPTIONS

       The following options are supported for use with disable:

       -c	       Cancels	any requests that are currently printing on printer. This option cannot be used with the -W option. If the printer
		       is remote, the -c option will be silently ignored.

       -W	       Waits until the request currently being printed is finished before disabling printer. This option cannot be used  with  the
		       -c option. If the printer is remote, the -W option will be silently ignored.

       -r [reason]     Assigns	a  reason  for	the  disabling	of  the  printer(s). This reason applies to all printers specified. This reason is
		       reported by lpstat -p. Enclose reason in quotes if it contains blanks. The default  reason  is  "unknown  reason"  for  the
		       existing printer, and "new printer" for a printer added to the system but not yet enabled.

OPERANDS

       The following operand is supported for both enable and disable:

       printer	       The  name of the printer to be enabled or disabled. Specify printer using atomic name. See printers.conf(4) for information
		       regarding the naming conventions for atomic names.

EXIT STATUS

       The following exit values are returned:

       0	       Successful completion.

       non-zero        An error occurred.

FILES

       /var/spool/lp/*	       LP print queue.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWpcu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       lp(1), lpstat(1), printers.conf(4), attributes(5)

SunOS 5.10							    9 Sep 1996								 enable(1)
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