install

#!/bin/bash
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

model=$1
if [[ -z $model ]]; then
	echo "Usage: $0 printer_model"
	echo
	echo "The printer model has to be specified without dashes."
	echo "Example: $0 dcp9020cdw"
	echo
	echo "Installs Brother MFC/DCP drivers in a sane way. Unlike the vendor"
	echo "installer, this does not make mess out of your system. Everything"
	echo "is kept under /opt/brother, system configuration is not touched."
	echo "A few symlinks are added to cups directories under /usr, their"
	echo "full list is output at the end."
	echo
	echo "This script assumes x86_64. It should be reasonably distro neutral."
	echo "Note that some of the binaries are 32bit. You're responsible for"
	echo "installing 32bit versions of glibc and libstdc++."
	echo
	echo "On Debian, these would be: libstdc++6:i386 libgcc1:i386"
	echo "  (you'll need: dpkg --add-architecture i386 ; apt-get update)"
	echo "On older Debian: ia32-libs lib32stdc++6"
	echo "On Fedora: glibc.i686 libstdc++.i686"

	exit 0
fi

tmpd=$(mktemp -d)
trap 'cd / ; rm -rf $tmpd' EXIT

# First, download the list of packages from Brother server.

curl -sL http://www.brother.com/pub/bsc/linux/infs/${1^^} -o $tmpd/inf || exit 1

pkg1=$(sed -n 's/^PRN_CUP_DEB=\(.*\)$/\1/p' $tmpd/inf)
pkg2=$(sed -n 's/^PRN_LPD_DEB=\(.*\)$/\1/p' $tmpd/inf)

if [[ -z $pkg1 ]]; then
	echo "Your printer model was not found."
	echo "Try models with a different suffix or other similar models."
	exit 1
fi

# Copy our files to the temp location.

cp brother_lpdwrapper* $tmpd/

# Download and extract the packages.

function download_and_extract()
{
	curl -sL http://www.brother.com/pub/bsc/linux/packages/$1 -o $1
	mkdir unpack
	cd unpack
	ar x ../$1
	cd ../tree
	tar -x --no-same-owner --no-same-permissions -f ../unpack/data.tar.*
	cd ..
	rm -rf unpack
}

cd $tmpd
mkdir tree
echo "Downloading and extracting packages."
download_and_extract $pkg1
download_and_extract $pkg2

# Find the expected name of the printer (lower case vs. upper case).

if [[ ! -d tree/opt/brother/Printers/$model ]]; then
	model=${model^^}
	if [[ ! -d tree/opt/brother/Printers/$model ]]; then
		echo "Could not find the expected files in the downloaded packages." >&2
		exit 1
	fi
fi

# Detect where the libraries should be.

function find_first_cups()
{
	while [[ -n $1 ]]; do
		[[ -d $1 ]] && { echo "$1"; return 0; }
		shift
	done
	echo "Could not find cups libraries." >&2
	return 1
}

libpath=$(find_first_cups /usr/lib64/cups/filter /usr/lib/cups/filter /usr/libexec/cups/filter) || exit 1

# Move stuff to opt...

cd tree
[[ -d usr/bin ]] && mv usr/bin opt/brother/Printers/$model/

# ...find and process the right lpdwrapper...

wrapper_path=opt/brother/Printers/$model/cupswrapper

function find_wrapper()
{
	while [[ -n $1 ]]; do
		name=${1##*/brother_lpdwrapper_}
		[[ -f $wrapper_path/brcupsconf$name ]] && { echo $1; return 0; }
		shift
	done
	echo "Could not find a supported cupswrapper." >&2
	return 1
}

wrapper=$(find_wrapper $tmpd/brother_lpdwrapper_*) || exit 1

wrapper_dest=opt/brother/Printers/$model/brother_lpdwrapper_$model
sed "s/@@MODEL@@/$model/g" $wrapper > $wrapper_dest
chmod 755 $wrapper_dest

# ...find the ppd name...

ppd=
for f in opt/brother/Printers/$model/cupswrapper/brother?${model}*; do
	[[ -e $f ]] || break
	if [[ -n $ppd ]]; then
		echo "Error: multiple ppd files found:" >&2
		cd opt/brother/Printers/$model/cupswrapper/
		ls brother_${model}* >&2
		exit 1
	fi
	ppd=$f
done
if [[ -z $ppd ]]; then
	echo "Error: no ppd file found in the downloaded packages." >&2
	exit 1
fi
ppd=${ppd##*/}

# ...and move the files to the live system.

mkdir -p /opt/brother/Printers || exit 1
mv opt/brother/Printers/$model /opt/brother/Printers/ || exit 1
cd ..

# Create the needed symlinks.

mkdir -p /usr/share/cups/model/Brother
ln -s /opt/brother/Printers/$model/cupswrapper/$ppd /usr/share/cups/model/Brother/${model}.ppd
ln -s /opt/brother/Printers/$model/brother_lpdwrapper_$model $libpath/

# Echo the symlinks.

echo "Symlinks created:"
echo /usr/share/cups/model/Brother/${model}.ppd
echo $libpath/brother_lpdwrapper_$model