lpd print filters of= output filters

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Subject: Re: Enhanced Lpd SCO osr505 References: <12e44768.0204231448.273528b6@posting.google.com> <3cc5e81e$0$79553$8eec23a@newsreader.tycho.net> <ph9dcuchtr16ov3emdof5q91dme4aslalm@4ax.com>
From: spcecdt@deeptht.armory.com (John DuBois)
Date: 24 Apr 2002 23:33:34 GMT

In article <ph9dcuchtr16ov3emdof5q91dme4aslalm@4ax.com>,
Gary Quiring  <gquiring@msn.com> wrote:
>On 23 Apr 2002 23:02:55 GMT, spcecdt@deeptht.armory.com (John DuBois) wrote:
>
>>In article <12e44768.0204231448.273528b6@posting.google.com>,
>>Pimpollo <sillygu@hotmail.com> wrote:
>>>Does anyone have a copy of the enhanced "lpd" that supports the "of"
>>>option (filters)?
>>
>>"of" has always been supported by lpd for local printers.  A version enhanced so
>>that "of" works for remote printers was shipped in 5.0.6a.
>>
>>        John
>Does it  work?  It's been in the man pages for years and never did in any prior
>release.  Did SCO actually fix it??

It always did work, for local printers only, but not in the way the man page
described.  The man page erroneously indicates that lpd filters have something
to do with lpfilter, which is incorrect.  The "of" capability is simply the
path to an executable to pipe the job through.
It didn't work for remote printers because we used the stock BSD lpd code,
which ignored the "of" capability for remote printers because it turns out to
be slightly more complicated.  And yes, it definitely works now; I added the
neccessary functionality.
Unfortunately the man page still refers to lpfilter; that should be fixed in
5.0.7.  Here's how you actually use "of":

If you set "of" to the path to a program, the program will be invoked
with two arguments, like this:

rm=132 -l66

rm=132 indicates that the paper right margin is at the 132nd column,
and -l66 indicates that the page length is 66 lines.

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Just setting of=/path/to/filter-program won't work if that program isn't
prepared to deal with those arguments.  If you want to use such a program,
create a front end for it that discards any arguments.  E.g. set
of=/usr/local/myfilter and make myfilter a two-line shell script:

#!/bin/ksh
exec /path/to/filter-program

        John
-- 
John DuBois  spcecdt@armory.com  KC6QKZ/AE  http://www.armory.com/~spcecdt/

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