apsfilter+efax

[Joe Pfeiffer <pfeiffer@xxxxxxxxxxx>]

OK, I'm pretty sure this is an obvious one...  but I'm not seeing it.

I'm using apsfilter with my main printer, and would like to set up my
fax modem as a second printer using efax.  I've got efax working with
lpd, using their recommended printcap entry:

fax:lp=/dev/null:sd=/var/spool/lpd/fax:if=/usr/bin/faxlpr:

This works for .ps files.  I'd like to integrate it with apsfilter, so
I can fax arbitrary files.  The apsfilter documentation includes the
following cryptic statement in section 4.2.3.1 (generic PostScript
printer):

This kind of queue is also useful if you want to
post-process the output from apsfilter with a third-party printer
driver. These packages usually expect PostScript files to arrive at
their own printer filter, so that they can call gs and/or their
driver.

Ummm... how do I postprocess the apsfilter output with
/usr/bin/faxlpr?
-- 
Joseph J. Pfeiffer, Jr., Ph.D.       Phone -- (505) 646-1605
Department of Computer Science       FAX   -- (505) 646-1002
New Mexico State University          http://www.cs.nmsu.edu/~pfeiffer
Southwestern NM Regional Science and Engr Fair:  http://www.nmsu.edu/~scifair