#!/bin/sh
#
#  bj200if - Print Ghostscript-simulated PostScript on a Canon BJ-200
#  Installed in /usr/local/libexec/lpd/bj200if
#
# Derived from the sample shown in section 11.4.1.3,
# Simulating PostScript on Non-PostScript Printers,
# in the Advanced Printer Setup page of the FreeBSD Handbook.

#
#  Read first two characters of the file
#
IFS="" read -r first_line
first_two_chars=`expr "$first_line" : '\(..\)'`

if [ "$first_two_chars" = "%!" ]; then
    #
    #  It is PostScript; use Ghostscript to scan-convert and print it.
    #
    #  Note that PostScript files are actually interpreted programs,
    #  and those programs are allowed to write to stdout, which will
    #  mess up the printed output.  So, we redirect stdout to stderr
    #  and then make descriptor 3 go to stdout, and have Ghostscript
    #  write its output there.  Exercise for the clever reader:
    #  capture the stderr output from Ghostscript and mail it back to
    #  the user originating the print job.
    #
    exec 3>&1 1>&2
    /usr/local/bin/gs -dSAFER -dNOPAUSE -q -sDEVICE=bj200 \
        -sOutputFile=/dev/fd/3 - && exit 0

    #
    /usr/local/bin/gs -dSAFER -dNOPAUSE -q -sDEVICE=bj200 -sOutputFile=- - \
        && exit 0
else
    #
    #  Plain text so just print it directly; print a form feed
    #  at the end to eject the last page.
    #
    #
    #  Treat LF as CR+LF:
    #
    printf "\03351" || exit 2

    echo "$first_line" && cat && printf "\015" && 
exit 0
fi

exit 2