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From: Lee Johnston <ljohnston@cyberworld.demon.co.uk>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Printing with FreeBSD 2.1.6
Date: Tue, 20 May 1997 22:22:47 +0100
Message-ID: <33821625.1F2210DB@cyberworld.demon.co.uk>
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I am using FreeBSD 2.1.6 with a non postscript printer (a Canon BJC-4100
Bubble Jet simulating a Epson LQ). I have managed to get ghostscript to
printout a .ps file on the printer, but when I create a printer filter
that is included in the FreeBSD handbook, which is shown below, it
doesn't work!
#!/bin/sh
#
# ifhp - Print Ghostscript-simulated PostScript on a Canon BJC-4100
# Installed in /usr/local/libexec/hpif
#
# Treat LF as CR+LF:
#
printf "\033&k2G" || exit 2
#
# Read first two characters of the file
#
read first_line
first_two_chars=`expr "$first_line" : '\(..\)'`
if [ "$first_two_chars" = "%!" ]; then
#
# It is PostScript; use Ghostscript to scan-convert and print it
#
/usr/local/bin/gs -dSAFER -dNOPAUSE -q -sDEVICE=epsonc
-sOutputFile=- - \
&& exit 0
else
#
# Plain text or HP/PCL, so just print it directly; print a form
# at the end to eject the last page.
#
echo $first_line && cat && printf "\f" && exit 2
fi
exit 2
I suspect that it may be the line ' first_two_chars=`expr "$first_line"
: '\(..\)'` ' as when I try a simple filter shown below, to echo the
result of the ' first_two_chars=`expr "$first_line" : '\(..\)'` ' line
to the printer, if only prints out ' expr "$first_line" : '\(..\)' '.
#!/bin/sh
read first_line
first_two_chars=`expr "$first_line" : '\(..\)'`
echo $first_two_chars && exit 0
exit 2
Has anyone come across this problem, and how do I solve it, Thanks!
______
Lee Johnston
ljohnston@cyberworld.demon.co.uk
http://www.cyberworld.demon.co.uk