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From: j@narcisa.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Can't get printer to work correctly
Date: 12 Jun 1995 12:03:27 +0200
Organization: Private U**x site, Dresden.
Lines: 208
Message-ID: <3rh3df$lsm@bonnie.tcd-dresden.de>
References: <3plcn3$e68@agate.berkeley.edu> <3qfedi$e4g@bonnie.tcd-dresden.de> <3r8trg$lts@agate.berkeley.edu>
Reply-To: joerg_wunsch@uriah.heep.sax.de
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Geordan Rosario <geordan@OCF.Berkeley.EDU> wrote:
>>RTFM printcap(5) for an explanation on how the various lpd filters
>>work.
>>
>I did go through printcap's man page quite a few times, and I still don't have
>filters straight.
Well, i didn't say it's the best explanation i could imagine of. :-)
It required me to perform a few trial-and-error steps as well... (and
finally, after wondering why it didn't work, and looking up the
source, i found that there has been a bug in the old lpd sources :-).
>Could you give me an example on using pr as the filter?
`pr' is the easiest, since it's a built-in filter (from the `-p'
option to lpr). Anyway, here are parts of my configuration:
lp|lp12|Standard line printer 12 cpi:\
:if=/root/lpr/textfilter:lf=/var/log/lpd-errs:\
:tf=/root/lpr/psfilter:\
:df=/root/lpr/dvifilter:\
:vf=/root/lpr/dummyfilter:\
:sh:lp=/dev/lpt0:pl#96:pw#96:px#1440:py#2100:
lq|Letter quality printer:\
:if=/root/lpr/textfilter:lf=/var/log/lpd-errs:\
:tf=/root/lpr/psfilter:\
:df=/root/lpr/dvifilter:\
:vf=/root/lpr/dummyfilter:\
:sh:lp=/dev/lpt0:pl#72:pw#80:px#2880:py#4200:
...
...quite a bunch more printers, which are all different in their
resolution values (but refer to the same physical printer).
The `dummyfilter' is a plain `cat', just needed to make `lpr -v' the
same as `lpr -l' (some FTP software client missed the `-l' flag).
The most complicated is the `textfilter':
#!/bin/sh
#
# Textfilter (`if' printcap entry) for lpd service
#
PATH=/bin:/usr/bin
USAGE="usage: textfilter [-c] -w width -l length -i indent -n login -h host [acc
tfile]"
COPT=0
WIDTH=-1
LENGTH=-1
INDENT=-1
LOGIN=""
HOST=""
ACCTFILE=""
phase="opts"
remjob="false"
###echo "$*" 1>&2
set -- `getopt cw:l:i:n:h: $*`
if [ $? != 0 ] ; then
echo $USAGE 1>&2
exit 2
fi
for i in $*
do
case $i in
-c)
COPT=1
shift
;;
-w)
WIDTH=$2
shift 2
;;
-l)
LENGTH=$2
shift 2
;;
-i)
INDENT=$2
shift 2
;;
-n)
LOGIN="$2"
shift 2
;;
-h)
HOST="$2"
shift 2
;;
--)
phase="posargs"
shift
;;
esac
done
if [ -z "$LOGIN" -o -z "$HOST" -o $phase != posargs -o $# -gt 1 ] ; then
echo $USAGE 1>&2
exit 2
fi
if [ $# -eq 1 ] ; then
ACCTFILE=$*
fi
#if [ `hostname` != "$HOST" ] ; then
# remjob="true"
# echo "\n\n\n\n"
# echo "*** Remote lpd job @ `hostname` on `date` ***\n\n\n\n"
# banner $LOGIN; echo "\n\n\n\n\n"
# banner " @"; echo "\n\n\n\n\n"
# banner $HOST; echo
# echo -n "\f"
#fi
### echo "COPT=$COPT, WIDTH=$WIDTH, LENGTH=$LENGTH, INDENT=$INDENT, \
###LOGIN=$LOGIN, HOST=$HOST, ACCTFILE=$ACCTFILE" 1>&2
###exit 0
if [ $COPT -eq 1 ] ; then
# simply shortcut it
cat
else
echo -n "^[@"
if [ -n "$INDENT" -a $INDENT -ne 0 ] ; then
awk 'BEGIN {printf "\033l%c", '$INDENT'; exit}'
fi
if [ -n "$LENGTH" ] ; then
if [ $LENGTH -le 72 ] ; then
echo -n "^[2"
# assume user wants to pretty-print
echo -n "^[P^[k0^[x1"
else
echo -n "^[x0"
if [ $LENGTH -le 96 ] ; then
echo -n "^[0"
fi
fi
else
# default: 8 lpi
echo -n "^[0"
fi
if [ -n "$WIDTH" ] ; then
if [ $WIDTH -le 80 ] ; then
# 10 cpi
echo -n "^[P"
elif [ $WIDTH -le 96 ] ; then
# 12 cpi
echo -n "^[M"
elif [ $WIDTH -le 120 ] ; then
# 15 cpi
echo -n "^[g"
else
# 20 cpi
echo -n "^[M^O"
fi
else
# default: 12 cpi
echo -n "^[M"
fi
# iso8859 ==> ibm437
#iso2ibm
tr '\344\366\374\304\326\334\337\361\321\341\351\355\363\372\277\241' \
'\204\224\201\216\231\232\341\244\245\240\202\241\242\243\250\255'
fi
The escape sequences (with ESC transliterated to ^[ for Usenet's sake)
are used to initialize an Epson SQ-870 printer to the desired
resolution. The final `tr' translates some of the ISO-8859-1 codes
into IBM codepage 437.
The bypass via $COPT is the `-l' flag.
Here are finally the bottom few lines from the `psfilter' (which is
invoked via `lpr -t', normally reserved for troff -- i agree that
something like `apsfilter' is a better solution at all):
if [ $WIDTH -gt 1440 ] # 1440 pixels is 8" * 180 dpi,
then # 2880 pixels is 8" * 360 dpi
gs -sOUTPUTFILE=- -sDEVICE=escp2 -dQUIET -dNOPAUSE -dSAFER - quit.ps
else
gs -sOUTPUTFILE=- -sDEVICE=epson -dQUIET -dNOPAUSE -dSAFER - quit.ps
fi
(Well, i realize that my scripts are using getopt(1). This is not
provided as a standard utility, and new implementations should use
getopts(1) instead, which is a shell builtin.)
--
cheers, J"org private: joerg_wunsch@uriah.heep.sax.de
http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)