#!/bin/bash

# This script is an input filter for printcap printing on a unix machine. It
# uses the smbclient program to print the file to the specified smb-based 
# server and service.
# For example you could have a printcap entry like this
#
# smb:lp=/dev/null:sd=/usr/spool/smb:sh:if=/usr/local/samba/smbprint
#
# which would create a unix printer called "smb" that will print via this 
# script. You will need to create the spool directory /usr/spool/smb with
# appropriate permissions and ownerships for your system.

# Set these to the server and service you wish to print to 
# In this example I have a WfWg PC called "lapland" that has a printer 
# exported called "printer" with no password.

#
# Script further altered by hamiltom@ecnz.co.nz (Michael Hamilton)
# so that the server, service, and password can be read from 
# a /usr/var/spool/lpd/PRINTNAME/.config file.
#
# Script further modified by Richard Sharpe to fix some things.
# Get rid of the -x on the first line, and add parameters
#
#    -t  now causes translate to be used when sending files
#
# Further modifications by Alfred Perlstein to fix some problems and
# improve the quality of the code (3-Dec-2001).
#
# More hacking by Richard Sharpe to improve portability. 9-Dec-2001.
#
# In order for this to work the /etc/printcap entry must include an 
# accounting file (af=...):
#
#   cdcolour:\
#	:cm=CD IBM Colorjet on 6th:\
#	:sd=/var/spool/lpd/cdcolour:\
#	:af=/var/spool/lpd/cdcolour/acct:\
#	:if=/usr/local/etc/smbprint:\
#	:mx=0:\
#	:lp=/dev/null:
#
# The /usr/var/spool/lpd/PRINTNAME/.config file should contain:
#   server=PC_SERVER
#   service=PR_SHARENAME
#   password="password"
#
# E.g.
#   server=PAULS_PC
#   service=CJET_371
#   password=""

#smbclient=/usr/pkg/bin/smbclient
# Assume that smbclient will be in the same place as smbprint

smbclient="`dirname $0`/smbclient"

#
# The last parameter to the filter is the accounting file name.
#   Extract the directory name from the file name.
#   Concat this with /.config to get the config file.
#
TRANS=0
eval acct_file=\${$#}
spool_dir=`dirname $acct_file` 
config_file=$spool_dir/.config

# Should read the following variables set in the config file:
#   server
#   service
#   password
#   username (optional)
#   IP (optional)
#   debug (optional)
#   debugsmb (optional)
#   debugfile (optional)
. $config_file

if [ "x$password" = "x" ] ; then
	password="-N"
fi

if [ "x$username" == "x" ] ; then
	username="$server";
fi

while test $# -gt 0; do
	case "$1" in
	-t)
		TRANS=1
		;;

	 *)   # Bad Parameters, ignore them ...
		;;
	 esac
	 shift
done

command="print - ;"
if [ $TRANS -eq 1 ]; then
	command="translate;$command";
fi

##
## Some security checks on the logfile if we are using it
##
## make the directory containing the logfile is necessary 
## and set the permissions to be rwx for owner only
##

debugfile="/tmp/smb-print/logfile"
logdir=`dirname $debugfile`
if [ ! -d $logdir ]; then 
	mkdir -m 0700 $logdir
fi

##
## check ownership.  If I don't own it refuse to 
## create the logfile
##
if [ ! -O $logdir ]; then
	echo "user running script does not own $logdir. Ignoring any debug options."
	debug=""
fi

touch $debugfile
if [ -h $debugfile ]; then
	echo "$debugful is a symlink.  Turning off debugging!"
	debug=""
fi

##
## We should be safe at this point to create the log file
## without fear of a symlink attack -- move on to more script work.
##

if [ "x$debug" = "x" ] ; then 
		debugfile=/dev/null debugargs=
else
        if [ $debug -eq 0 ] ; then
		debugfile=/dev/null debugargs=
	else
		set -x; exec >>$debugfile 2>&1
		debugargs="$debugfile."
		#[ "x$debugsmb" == "x" ] || debugargs="$debugargs -d $debugsmb"
	fi
fi

if [ "x$smbconf" != "x" ]; then

	smbconf="-s $smbconf"

fi

if [ "x$IP" != "x" ]; then

	IP="-I $IP"

fi

if [ "x$debugargs" != "x" ]; then

	debugargs="-l $debugargs"

fi

$smbclient \
	"\\\\$server\\$service" \
	$password \
	$smbconf \
	$IP \
	$debugargs \
	-U $username \
	-c "$command"
#