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- Newsgroups: comp.unix.ultrix,comp.sys.hp,comp.sys.dec
- Path: sparky!uunet!morrow.stanford.edu!leland.Stanford.EDU!polly
- From: polly@leland.Stanford.EDU (polly siegel)
- Subject: Summary: How to enable Duplex printing from printcap?
- Message-ID: <1992Aug19.230414.15116@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: DSG, Stanford University, CA 94305, USA
- References: <1992Aug18.164239.14725@leland.Stanford.EDU>
- Date: Wed, 19 Aug 92 23:04:14 GMT
- Lines: 89
-
- I posted a query to the net on how to access the duplex feature on my
- HP LaserJet IIID printer (with PostScript) from the BSD lpr interface.
- I've received a lot of responses and have arrived at a couple of solutions to
- the problem, so I thought I'd summarize here. Thanks to everyone who
- responded!
-
- No solution seemed to solve the complete problem, but it looks like we have
- a hybrid solution that should work.
-
- First, to summarize the problem:
-
- We have an HP LaserJet IIID printer which has duplex (two-sided) printing
- and PostScript, along with some other options. The printer is connected
- to a DEC 5000/240 running Ultrix 4.2. Other machines access the printer
- through the network; most of the machines are DEC machines, but not all.
- I wanted to be able to access the fancy features of the printer through the
- lpr rather than having to manually set them on the printer.
-
- Possible solutions:
-
- 1. Modify lpr. If you read the lpr man page, you'll notice that for
- normal printers, no general capabilities are provided to access special
- features of a particular printer (as in the system V lp command). Since I
- didn't have the source to lpr, and since that would change with any operating
- system upgrade, I decided not to modify lpr to add my own options (which would
- then get sent to my print filters).
-
- 2. Configure the printer as a DEC Print Server. If you read the lpr man page
- further, you'll find that lpr supports a bunch of printer-specific options
- which includes the features I wanted access to. However, you must enable the
- printer as a Print Server to gain access to them. The DEC documentation
- refers to specific DEC printers when talking about print servers, and despite
- trying various options in printcap, I could never get this to work for
- my printer. So I gave up on this option. (Maybe someone has some more
- information on this?)
-
- 3. Use an existing option to lpr that isn't being used. Here, we can snarf
- an unused option (say, -i or something) and modify the input filter to snag
- it and output the appropriate PostScript code. This approach is tempting but
- is potentially perilous since you can't be sure that no one will want to use
- that option. This solution also requires an understanding of the filters that
- the printer uses (as set in /etc/printcap) so that you can insert the
- postscript code at the appropriate place.
-
- What I finally settled on was a script and a filter. The script, supplied by
- Andy Sun (andy@ie.utoronto.ca) (and modified slightly by me), is for printing
- PostScript files. It simply prepends the appropriate PostScript codes for the
- options you want. The flags to lpr are the same as the flags documented for
- Print Servers -- so -K2 will get you duplex printing. To print a postscript
- file you then simply say "lprscript -K2 myfile" and it will print it with
- duplex printing to $PRINTER. If you're interested in this you can send me
- mail...
-
- Gary Beckmann (gary@zeus.dfci.harvard.edu) sent me a pointer to the program
- "psf", written by Tony Field (tony@ajfcal.cuc.ab.ca). This can be ftp'd
- from pub/psf/psf3.5.tar.Z at fsa.cpsc.ucalgary.ca. This program (or set
- of programs) provided filters for normal text files and other sorts of files
- to allow you to access both special capabilities of the printer and to
- do other special printing things, such as 2-up and 4-up printing. It's
- basically a postscript filter that runs in front of lpr which inserts all
- the appropriate options in postscript. So, to print a text file 4-up and
- in duplex mode (for major space savings), you'd say "psf -4 -D myfile | lpr".
-
- psf is really easy to install and supports just about any printer you'd
- want to support. Be aware that the printer definition file for the
- HP LaserJet IIID with PostScript Plus has some errors, so if you're interested
- I can send you my modified PostScript definition file.
-
- So I can use lprscript for PostScript files, and psf for non-PostScript files
- to access the full capabilities of the printer.
-
- I would still like to be able to configure this printer as a Print Server, and
- I might work on this some more. If someone out there knows
- that it either can or can't be done, I'd appreciate hearing about it.
-
- We had also had some trouble getting the right printcap definition, so if
- anyone is interested I can send that to them too. (Should this stuff possibly
- go in a FAQ just in case anyone else is interested in it?)
-
- Thanks again for all the responses!
-
- - polly
-
- --------
- Polly Siegel
- Stanford University
- (polly@grover.stanford.edu)
-
-
-