Re: lpr duplex printing

[Steve Litt]

On Tue, 10 Jan 2017 12:15:18 -0500
Predrag Punosevac  wrote:

> Hi Misc,
> 
> I wonder if somebody could educate me on duplex printing with lpr
> command from the base

What I do is set up multiple printer definitions for the same hardware
printer. One definition tells the printer to print duplex, the other
doesn't.

So when I do:

lpr -P lp_oneside myfile

my file is printed one sided, but when I:

lpr -P lp_duplex myfile

my file is printed on both sides.
 
SteveT

Steve Litt 
December 2016 featured book: Rapid Learning for the 21st Century
http://www.troubleshooters.com/rl21

Re: lpr duplex printing

[Predrag Punosevac]

gwes  wrote:

> 
> >I wonder if somebody could educate me on duplex printing with lpr
> >command from the base
> 
> > What does actually happen with the document when I use switch -s2 in
> > a2ps?
> 
> > Thanks
> > Predrag
> 
> lpr is very minimal. It could have a filter added
> to send a file through a2ps on its way to the physical printer.
> You could wrap a one or two line shell script
> around lpr to do the same thing.
> 
> a2ps generates postscript for the text input
> It adds a flag to print duplex in that postscript.
> The printer interprets that and does what you asked.
> 
> You can send a postscript command string to set the
> printer into duplex mode and another to reset it.
> I don't remember it offhand. It's one or two lines
> to set a value into devicedict or systemdict.
> If you look at the a2ps sources it's in there.
> 
> Geoff Steckel

Thanks a bunch! Bruno was onto something. Somebody pointed out to me off
the list that 

%!
<>setpagedevice

at the beginning of a PostScript file I am trying to print is all I
really need.

Predrag

Re: lpr duplex printing

[gwes]

>I wonder if somebody could educate me on duplex printing with lpr
>command from the base

> What does actually happen with the document when I use switch -s2 in
> a2ps?

> Thanks
> Predrag

lpr is very minimal. It could have a filter added
to send a file through a2ps on its way to the physical printer.
You could wrap a one or two line shell script
around lpr to do the same thing.

a2ps generates postscript for the text input
It adds a flag to print duplex in that postscript.
The printer interprets that and does what you asked.

You can send a postscript command string to set the
printer into duplex mode and another to reset it.
I don't remember it offhand. It's one or two lines
to set a value into devicedict or systemdict.
If you look at the a2ps sources it's in there.

Geoff Steckel

Re: lpr duplex printing

[Bruno d'Arcangeli]

Le mardi 10 janv. 2017 à 12:15:18 (-0500), Predrag Punosevac a écrit:
> Hi Misc,
> 
> I wonder if somebody could educate me on duplex printing with lpr
> command from the base
> 
> predrag@oko$ uname -a
> OpenBSD oko.bagdala2.net 6.0 GENERIC.MP#2 amd64
> 
> I use LPD spooling with the network printer Brother HL-L5250DN which is
> duplex capable. More over I have no problem printing duplex with the
> command 
> 
> a2ps -Prp -1 -s2 filename.ps
> 
> Obviously a2ps is using the same LPD. However I read lpr man pages
> several times over and it seems that lpr has no switch for duplex
> printing.
> 
> What does actually happen with the document when I use switch -s2 in
> a2ps?

Duplex is not the role of lpr. a2ps add a line in your PS file starting
with /Duplex (can't remember the exact syntax).

Bruno

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