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Date: Wed, 19 Jan 2011 23:00:03 -0600 (CST)
From: Robert Bonomi <bonomi@mail.r-bonomi.com>
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To: questions@freebsd.org, sfourman@gmail.com
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Cc: 
Subject: Re: FreeBSD cups printing server
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> From owner-freebsd-questions@freebsd.org  Wed Jan 19 21:14:59 2011
> Date: Wed, 19 Jan 2011 20:39:01 -0600
> From: "Sam Fourman Jr." <sfourman@gmail.com>
> To: FreeBSD Questions <questions@freebsd.org>
> Cc: 
> Subject: FreeBSD cups printing server
>
> Hello list,
>
> I have a freshly installed FreeBSD 8.2 print server using the latest cups 
> from ports.
>
> I have a Brother 9440CN printer and a Virtual pdf printer installed with 
> cups-pdf
>
> both work great...
>
> my problem is I want to create a pdf for everything I send to the brother 
> printer (for archival purposes)
>
> can I add multiple printers to a single queue? or is there a script 
> somewhere, that I could copy the cups generated postscript to the 
> cups-pdf printer?

At least a couple of options:

(the *UGLY* one)
1) define a named pipe
2) tell CUPS that that pipe is the printer device
3) from the system start-up script, launch a script
   that does the following in a loop:
     uses tee(1) to read from the named pipe, and copy to a unique archive file
     pipes stdout from tee(1) to the actual printer device