#  :
#	@(#) standard 69.1 98/03/16
#
#	Copyright (C) 1988-1998 The Santa Cruz Operation, Inc.
#		All Rights Reserved.
#	The information in this file is provided for the exclusive use of
#	the licensees of The Santa Cruz Operation, Inc.  Such users have the
#	right to use, modify, and incorporate this code into other products
#	for purposes authorized by the license agreement provided they include
#	this notice and the associated copyright notice with any such product.
#	The information in this file is provided "AS IS" without warranty.
#
###########
##
## Standard printer interface program.
##
###########
#

#####
#
# Until we get to the point below where the printer port
# and physical printer are initialized, we can't do much
# except exit if the Spooler/Scheduler cancels us.
#####
trap 'exit' 15

#####
#
# We can be clever about getting a hangup or interrupt, though, at least
# until the filter runs. Do this early, even though $LPTELL
# isn't defined, so that we're covered.
#####
catch_hangup () {
	if [ -n "${LPTELL}" ]
	then
		echo \
"The connection to the printer dropped; perhaps the printer went off-line?" \
		| ${LPTELL} ${printer}
	fi
	return 0
}
catch_interrupt () {
	if [ -n "${LPTELL}" ]
	then
		echo \
"Received an interrupt from the printer.  The reason is unknown,
although a common cause is that the baud rate is too high." \
		| ${LPTELL} ${printer}
	fi
	return 0
}
trap 'catch_hangup; exit_code=129 exit 129' 1
trap 'catch_interrupt; exit_code=129 exit 129' 2 3

#####
#
# Most of the time we don't want the standard error to be captured
# by the Spooler, mainly to avoid "Terminated" messages that the
# shell puts out when we get a SIGTERM. We'll save the standard
# error channel under another number, so we can use it when it
# should be captured.
#####
exec 5>&2 2>/dev/null

#####
#
# Set some globally used variables and functions.
#####

: ${TMPDIR:=/tmp}
: ${SPOOLDIR:=/usr/spool/lp}
: ${TERMINFO:=/usr/lib/terminfo}
: ${CHARSETDIR:=/usr/lib/charsets}

: ${LOCALPATH:=${SPOOLDIR}/bin}
PATH="/bin:/usr/bin:${LOCALPATH}"

MAX_COLS_SMALL_BANNER=40

#####
# Use ${TMPPREFIX} as the prefix for all temporary files, so
# that cleanup is easy. The prefix may be up to 13 characters
# long, so you only have space for one more character to make
# a file name. If necessary, make a directory using this prefix
# for better management of unique temporary file names.
#####
TMPPREFIX=${TMPDIR}/`uname -n`$$

#####
# Before exiting, set ${exit_code} to the value with which to exit.
# Otherwise, the exit from this script will be 0.
#####
trap 'rm -fr ${TMPPREFIX}?; exit ${exit_code}' 0

#####
# ${LPTELL} is the name of a program that will send its
# standard input to the Spooler. It is used to forward
# the description of a printer fault to the Spooler,
# which uses it in an alert to the administrator.
#####
if [ ! -x "${LPTELL:=${LOCALPATH}/lp.tell}" ]
then
	fake_lptell () {
		header="no"
		while read line
		do
			if [ "no" = "${header}" ]
			then
				errmsg ERROR ${E_IP_UNKNOWN} \
		"unknown printer/interface failure" \
		"consult your system administrator;
		reasons for failure (if any) follow:"
				header=yes
			fi
			echo "${line}" >&2
		done
		return 1
	}
	LPTELL=fake_lptell
fi

#####
# ${DRAIN} is the name of a program that will wait
# long enough for data sent to the printer to print.
#####
if [ -x "${LOCALPATH}/drain.output" ]
then
	DRAIN="${LOCALPATH}/drain.output 5"	# wait only five seconds
else
	DRAIN=
fi

#####
# ${LPCAT} is the name of a program to use as a default
# filter. Minimally it should copy its standard input to
# the standard output, but it should also trap printer
# faults. The current LPCAT traps hangups (DCD dropping, SIGHUP),
# interrupts (SIGINT, SIGQUIT), broken pipe (SIGPIPE), and
# excess delays in sending data to the printer, interpreting all
# as printer faults.
#####
if [ ! -x "${LPCAT:=${LOCALPATH}/lp.cat}" ]
then
	LPCAT="cat"
fi

#####
# ${LPSET} is the name of a program that will set the
# character pitch, line pitch, page width, page length,
# and character set. It helps to have this in a single
# binary program so that (1) it's faster than calls
# to "tput"; and (2) it can access the new Terminfo
# capabilities for printers (on pre SVR3.2 machines, tput can't).
#####
if [ ! -x "${LPSET:=${LOCALPATH}/lp.set}" ]
then
	fake_lpset () {
		echo H V W L S >&2
		false
	}
	LPSET=fake_lpset
fi

#####
# ${TPUT} is "tput" IFF it works. We'll disable it if we get an
# ugly error message the first time we use it. See the TERM variable
# later in the script.
#
# NOTE: The check we use to see if "tput" works is to use an OLD
# Terminfo capability, like "lines". If it works with that it may
# still fail with some of the newer capabilities like "init" (SVR3.0)
# or "swidm" (SVR3.2), because the version of "tput" we have on your
# machine is older. Thus, on some of the code where ${TPUT} is used
# you'll see "2>/dev/null" being used to avoid ugly error messages.
#####
TPUT=tput

#####
#
# ${LPPAGER} is the name of a filter that will pad its input at
# the tail to make it exactly fit the last page. This is only
# used for simple printers that don't have a formfeed. (Unfortunately,
# the "pr" command won't work.) ${LPPAGER} takes one argument, the
# page length (in lines).
#
# NOTE: This program must trap SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGTERM.
# The first four can occur with various real and imaginary printers.
# The last occurs when we are terminated (disable, cancel). On SIGTERM
# the ${LPPAGER} program must finish a full page before exiting!
#####
if [ ! -x "${LPPAGER:=${LOCALPATH}/lp.page}" ]
then
	LPPAGER=
fi

#####
# Error message formatter:
#
# Invoke as
#
#	errmsg severity message-number problem help
#
# where severity is "ERROR" or "WARNING", message-number is
# a unique identifier, problem is a short description of the
# problem, and help is a short suggestion for fixing the problem.
#####

LP_ERR_LABEL="UX:lp"

E_IP_ARGS=1
E_IP_OPTS=2
#E_IP_FILTER=3
E_IP_STTY=4
E_IP_UNKNOWN=5
E_IP_BADFILE=6
E_IP_BADCHARSET=7
E_IP_BADCPI=8
E_IP_BADLPI=9
E_IP_BADWIDTH=10
E_IP_BADLENGTH=11
E_IP_ERRORS=12		# (in slow.filter)

errmsg () {
	case $1 in
	ERROR )
		sev="  ERROR";
		;;
	WARNING )
		sev="WARNING";
		;;
	esac
#	tag=`expr "${LP_ERR_LABEL}" : "\(.*\):"``expr "${LP_ERR_LABEL}" : ".*:\(.*\)"`
	echo "${LP_ERR_LABEL}: ${sev}: $3
        TO FIX: $4" >&5
}


###########
##
## Check arguments
###########

parse () {
	echo "`expr \"$1\" : \"^[^=]*=\(.*\)\"`"
}

#####
#
# This program is invoked as
#
# ${SPOOLDIR}/.../printer request-id user title copies options files...
#
# The first three arguments are simply reprinted on the banner page,
# the fourth (copies) is used to control the number of copies to print,
# the fifth (options) is a blank separated list (in a single argument)
# of user or Spooler supplied options (without the -o prefix),
# and the last arguments are the files to print.
#####

if [ $# -lt 6 ]
then
	errmsg ERROR ${E_IP_ARGS} \
		"wrong number of arguments to interface program" \
		"consult your system administrator"
	exit_code=1
	exit 0
fi

printer=`basename $0`
request_id=$1
user_name=$2
title=$3
copies=$4
option_list=$5

shift 5
files="$*"
nfiles=$#

if [ -z "${BANNERS}" ]
then
	nhead=1
else
	nhead=${BANNERS}
fi

nobanner="no"
nofilebreak="no"
stty=

inlist=
for i in ${option_list}
do
	case "${i}" in

	nobanner )
		nobanner="yes"
		;;

	nofilebreak )
		nofilebreak="yes"
		;;

	cpi=pica )
		cpi=10
		;;
	cpi=elite )
		cpi=12
		;;
	cpi=* )
		cpi=`parse ${i}`
		;;

	lpi=* )
		lpi=`parse ${i}`
		;;

	length=* )
		length=`parse ${i}`
		;;

	width=* )
		width=`parse ${i}`
		;;

	stty=\'* )
		#####
		#
		# If you want to add options that, like "stty",
		# take a list (e.g. foo='a b c'), identify
		# them here and below.
#	foo=\'* )
		#####
		inlist=`expr "${i}" : "^\([^=]*\)="`
		case "${i}" in
		${inlist}=\'*\' )
			list=`expr "${i}" : "^[^=]*='\(.*\)'"`
			case "${inlist}" in
			stty )
				stty="${stty} ${list}"
				;;
#			foo )
#				foo="${foo} ${list}"
#				;;
			esac
			inlist=
			;;
		* )
			list=`expr "${i}" : "^[^=]*='\(.*\)"`
			;;
		esac
		;;

	stty=* )
		stty="${stty} `parse ${i}`"
		;;

#	foo=* )
#		foo="${foo} `parse ${i}`"
#		;;
	*\' )
		list="${list} "`expr "${i}" : "\(.*\)'\$"`
		case "${inlist}" in
		stty )
			stty="${stty} ${list}"
			;;
#		foo )
#			foo="${foo} ${list}"
#			;;
		esac
		;;

	#####
	#
	# If you want to add simple options (e.g. bar=a, e.g. stuff)
	# identify them here.
	#####
#	bar=* )
#		bar=`parse ${i}`
#		;;
#	stuff )
#		stuff="yes"
#		;;

	* )
		if [ -n "${inlist}" ]
		then
			list="${list} ${i}"
		else
			errmsg WARNING ${E_IP_OPTS} \
				"unrecognized \"-o ${i}\" option" \
				"check the option, resubmit if necessary
		printing continues"
		fi
		;;
	esac
done

#####
#
# Additional ``parameters'' are passed via Shell environment
# variables:
#
#	TERM	The printer type (used for Terminfo access)
#	CHARSET	The character set to choose
#	FILTER	The filter to run
#####

#####
# Set defaults for unset variables.
#####

: ${TERM:=unknown}
tput lines 1>/dev/null 2>&1 || TPUT=:

: ${CHARSET:=cs0}

if [ -z "${FILTER}" ]
then
	#####
	#
	# If no filter is being used, we have a little routine that
	# will push the data to the printer. It traps hangups (loss
	# of carrier) and checks for excessive delays in sending the
	# data to the printer. The lesser of the print rate of the printer
	# (obtained from Terminfo) or the baud rate is used to compute
	# the expected delay. If neither of these is correct, you
	# may be experiencing false alarms. If so, give the correct
	# rate, in characters per second, as a single argument.
	# An argument of 0 means don't check for delays.
	# Give an -r option to get a printout of actual delays.
	# (QUOTES ARE IMPORTANT!)
	#####
	# FILTER="${LPCAT} 120"			# e.g. 120 CPS
	FILTER="${LPCAT} 0"			# allow infinite delays
	# FILTER="${LPCAT} -r 0 2>/tmp/delays"	# check actual delays
	# FILTER=${LPCAT}
fi


###########
##
## Initialize the printer port
###########

#####
#
# SERIAL PORTS:
# Initialize everything.
#
# PARALLEL PORTS:
# Don't initialize baud rate.
#
# It's not obvious how to tell if a port is parallel or serial.
# However, by splitting the initialization into two steps and letting
# the serial-only part fail nicely, it'll work.
#
# Another point: The output must be a ``tty'' device. If not, don't
# bother with any of this.
#####
stty1= stty2=
tty 0<&1 1>/dev/null 2>&1 && {

	#####
	#
	# First set the default parameters,
	# then the requested parameters.
	#####

	stty \
		9600 \
			0<&1 2>/dev/null 1>&2
	stty \
		cs8 -cstopb -parenb -parodd \
		ixon -ixany \
		opost -olcuc onlcr -ocrnl -onocr -onlret -ofill \
		nl0 cr0 tab0 bs0 vt0 ff0 \
			0<&1 2>/dev/null 1>&2

	if [ -n "${stty}" ]
	then
		if stty ${stty} 0<&1 1>/dev/null 2>&5
		then
			:
		else
			errmsg ERROR ${E_IP_STTY} \
				"stty option list failed" \
				"check the \"-o stty\" option you used,
		or consult your system administrator"
			exit_code=1
			exit 0
		fi
	fi

	#####
	#
	# Here you may want to add other port initialization code.
	# Some examples:
	#
	# estty	# for printer needing hardware flow control (3B2/EPORTS)
	# fctty	# for printer needing hardware flow control (3B15,3B20)
	#####
	#estty 0<&1
	#fctty 0<&1


	##########
	#
	# Find out if we have to turn off opost before initializing the
	# printer and on after. Likewise, check clocal.
	#
	# Turning OFF opost (output postprocessing) keeps the UNIX system
	# from changing what we try to send to the printer. Turning ON
	# clocal keeps the UNIX system from dropping what we are trying to
	# send if the printer drops DTR. An example of the former is the
	# AT&T 479, which wants to send a linefeed (ASCII 10) when a page
	# width of 10 is set; with opost on, this COULD BE turned into a
	# carriage-return/linefeed pair. An example of the latter is the
	# AT&T 455, which momentarily drops DTR when it gets the
	# initialization string, is2; with clocal off, the UNIX system
	# stops sending the rest of the initialization sequence at that
	# point.
	#
	# THIS CODE MUST FOLLOW THE REST OF THE PORT INITIALIZATION CODE.
	##########
	exec 3>&1
	cur_stty=`stty -a 0<&3`
	exec 3>&-
	expr "${cur_stty}" : '.*-opost' 1>/dev/null 2>&1 \
		|| stty1="${stty1} -opost" stty2="${stty2} opost"
	expr "${cur_stty}" : '.*-clocal' 1>/dev/null 2>&1 \
		&& stty1="${stty1} clocal" stty2="${stty2} -clocal"

}


###########
##
## Initialize the physical printer (Part I).
## Here we bring the printer to a sane state.
###########

##########
#
# WARNING! The "echo" command will catch backslashes (\) and
# try to interpret the characters following it. Thus, using
# "echo" to print string values obtained from "tput" is dangerous.
##########

#####
# We're confident that most printers don't have backslashes
# in the control sequences for carriage return and form-feed.
# We're also confident that these don't contain newlines.
# We're also confident that most printers have a linefeed
# in the control sequence for doing a newline (move to beginning
# of next line), but we can't capture it like we do the
# carriage return or form-feed. Thus we set it unconditionally.
# We don't set form-feed if it isn't defined, however, because
# maybe the printer doesn't have a formfeed. If not set, we'll
# have to pass the banner page(s) through the LPPAGER program
# to make sure they end at a page break.
#####

CR=`${TPUT} cr`
[ -z "${CR}" ] && CR="\r"

FF=`${TPUT} ff`

NL="${CR}\n"

lines=`${TPUT} lines`
[ -z "${lines}" -o 0 -ge "${lines}" ] && lines=66

cols=`${TPUT} cols`
[ -z "${cols}" -o 0 -ge "${cols}" ] && cols=132

#####
#
# Basic initialization. The ``else'' clause is equivalent,
# but covers cases where old Terminal Information Utilities are present.
#####
[ -n "${stty1}" ] && stty ${stty1} 0<&1
if ${TPUT} init 2>/dev/null
then
	:
else
	pgm=`${TPUT} iprog`
	if [ -x "${pgm}" ]
	then
		eval ${pgm}
	fi

	${TPUT} is1
	${TPUT} is2

	tabset=
	if [ "8" != "`${TPUT} it`" ]
	then
		stty tab3 0<&1 1>/dev/null 2>&1

	elif `${TPUT} ht >/dev/null`
	then
		tabset="/usr/lib/tabset/${TERM}"
		if [ -r ${tabset} ]
		then
			cat -s ${tabset}
		fi
		stty tab3 0<&1 1>/dev/null 2>&1
	fi

	file=`${TPUT} if`
	if [ "${tabset}" != "${file}" -a -r "${file}" ]
	then
		cat -s "${file}"
	fi

	${TPUT} is3
	echo "${CR}\c"
fi
[ -n "${stty2}" ] && stty ${stty2} 0<&1

#####
#
# The banner page (and cancellation page) will
# use double width characters if they're available.
#####
WIDE_CS=`${TPUT} swidm 2>/dev/null` && NORM_CS=`${TPUT} rwidm 2>/dev/null`
PAD="#####${NL}"

#####
#
# Now that the printer is ready for printing, we're able
# to record on paper a cancellation.
#####

cancel_banner () {
	echo "${PAD}${PAD}\c"
	echo "#####${WIDE_CS} Job ${request_id}${NORM_CS}${NL}\c"
	echo "#####${WIDE_CS} suspended or canceled${NORM_CS}${NL}\c"
	echo "${PAD}${PAD}\c"
}

canceled () {
	${TPUT} scs 0 2>/dev/null
	echo "${CR}\c"
	if [ "${width:-${cols}}" -lt "${MAX_COLS_SMALL_BANNER}" ]
	then
		WIDE_CS= NORM_CS=
	fi
	if [ -z "${FF}" ]
	then
		cancel_banner | ${LPPAGER} ${length}
	else
		cancel_banner; echo "${CR}${FF}\c"
	fi
}

trap 'canceled; exit_code=0 exit' 15


###########
##
## Print the banner page
###########

#####
#
# You may want to change the following code to get a custom banner.
#####

regular_banner () {
	echo "${CR}\c"
	echo "${PAD}${PAD}${PAD}${PAD}${PAD}\c"
	echo "#####${WIDE_CS}       User: ${user_name}${NORM_CS}${NL}\c"
	if [ -n "${title}" ]
	then
		echo "${PAD}\c"
		echo "#####${WIDE_CS}      Title: ${title}${NORM_CS}${NL}\c"
	fi
	echo "${PAD}\c"
	echo "#####${WIDE_CS}    Printed: `date '+%a %H:%M %h %d, %Y'`${NORM_CS}${NL}\c"
	echo "${PAD}\c"
	echo "#####${WIDE_CS} Job number: ${request_id}${NORM_CS}${NL}\c"
	echo "${PAD}${PAD}${PAD}${PAD}${PAD}\c"
}

small_banner () {
	echo "${CR}\c"
	echo "${PAD}\c"
	echo "#####  User: ${user_name}${NL}\c"
	if [ -n "${title}" ]
	then
		echo "##### Title: ${title}${NL}\c"
	fi
	echo "#####  Date: `date '+%a %H:%M %h %d, %Y'`${NL}\c"
	echo "#####   Job: ${request_id}${NL}\c"
	echo "${PAD}\c"
}

if [ "no" = "${nobanner}" ]
then
	if [ "${width:-${cols}}" -lt "${MAX_COLS_SMALL_BANNER}" ]
	then
		ban=small_banner
	else
		ban=regular_banner
	fi

# Added for XENIX compatability with /etc/default/lpd

	while [ $nhead -gt 0 ]
	do

		if [ -z "${FF}" ]
		then
			${ban} | ${LPPAGER} ${length}
		else
			${ban}; echo "${CR}${FF}\c"
		fi
		nhead=`expr $nhead - 1`
	done
fi


###########
##
## Initialize the physical printer (Part II)
## Here we select the character and line pitches, page size,
## and character pitch. One could argue that this should be
## done before the banner is printed, so that the banner fits
## on a preprinted form. We don't, to keep the banner page
## looking consistent for the operator.
## You can move this code before the banner code if you disagree.
###########

#####
#
# The funny business with the "exec" and "2>&1". is to let us capture
# the standard ERROR, not the standard OUTPUT as is the usual case
# with foo=`cmd`. We duplicate the standard output (i.e the
# channel to the printer) as channel 3, then do the foo=`cmd`.
# Inside the `cmd` we redirect the standard error to the same
# place as the standard output (now being captured), then redirect
# the standard output to the same place as channel 3 (the printer,
# where we want it).
#####
[ -n "${stty1}" ] && stty ${stty1} 0<&1
exec 3>&1
chk=`${LPSET} "${cpi}" "${lpi}" "${width}" "${length}" "${CHARSET}" 2>&1 1>&3`
exec 3>&-
[ -n "${stty2}" ] && stty ${stty2} 0<&1

#####
#
# The standard error of the delivered ${LPSET} program
# is a string of letters, H, V, W, L, S, which correspond
# to cpi, lpi, width, length, and character set. A letter
# is present only if the corresponding attribute could not
# be set.
#####
for err in ${chk}
do
	case ${err} in
	H )
		errmsg WARNING ${E_IP_BADCPI} \
			"can't select the character pitch \"${cpi}\"" \
			"check the valid pitches for the printer,
		or consult your system administrator;
		printing continues"
		;;
	V )
		errmsg WARNING ${E_IP_BADLPI} \
			"can't select the line pitch \"${lpi}\"" \
			"check the valid pitches for the printer,
		or consult your system administrator;
		printing continues"
		;;
	W )
		width=${cols}
		errmsg WARNING ${E_IP_BADWIDTH} \
			"can't select the page width \"${width}\"" \
			"check the valid widths for the printer,
		or consult your system administrator;
		printing continues"
		;;
	L )
		length=${lines}
		errmsg WARNING ${E_IP_BADLENGTH} \
			"can't select the page length \"${length}\"" \
			"check the valid lengths for the printer,
		or consult your system administrator;
		printing continues"
		;;
	S )
		errmsg WARNING ${E_IP_BADCHARSET} \
			"can't select the character set \"${CHARSET}\"" \
			"check the name given in the -S option,
		or consult your system administrator;
		printing continues"
		;;
	esac
done


###########
##
## Print some copies of the file(s)
###########

#####
#
# The protocol between the interface program and the Spooler
# is fairly simple:
#
#	All standard error output is assumed to indicate a
#	fault WITH THE REQUEST. The output is mailed to the
#	user who submitted the print request and the print
#	request is finished.
#
#	If the interface program sets a zero exit code,
#	it is assumed that the file printed correctly.
#	If the interface program sets a non-zero exit code
#	less than 128, it is assumed that the file did not
#	print correctly, and the user will be notified.
#	In either case the print request is finished.
#
#	If the interface program sets an exit code greater
#	than 128, it is assumed that the file did not print
#	because of a printer fault. If an alert isn't already
#	active (see below) one will be activated. (Exit code
#	128 should not be used at all. The shell, which executes
#	this program, turns SIGTERM, used to kill this program
#	for a cancellation or disabling, into exit 128. The
#	Spooler thus interpretes 128 as SIGTERM.)
#
#	A message sent to the standard input of the ${LPTELL}
#	program is assumed to describe a fault WITH THE PRINTER.
#	The output is used in an alert (if alerts are defined).
#	If the fault recovery is "wait" or "begin", the printer
#	is disabled (killing the interface program if need be),
#	and the print request is left on the queue.
#	If the fault recovery is "continue", the interface program
#	is allowed to wait for the printer fault to be cleared so
#	it can resume printing.
#
# This interface program relies on filters to detect printer faults.
# In absence of a filter provided by the customer, it uses a simple
# filter (${LPCAT}) to detect the class of faults that cause DCD
# (``carrier'') drop. The protocol between the interface program and
# the filter:
#
#	The filter should exit with zero if printing was
#	successful and non-zero if printing failed because
#	of a printer fault. This interface program turns a
#	non-zero exit of the filter into an "exit 129" from
#	itself, thus telling the Spooler that a printer fault
#	(still) exists.
#
#	The filter should report printer faults via a message
#	to its standard error. This interface program takes all
#	standard error output from the filter and feeds it as
#	standard input to the ${LPTELL} program.
#
#	The filter should wait for a printer fault to clear,
#	and should resume printing when the fault clears.
#	Preferably it should resume at the top of the page
#	that was being printed when the fault occurred.
#	If it waits and finishes printing, it should exit
#	with a 0 exit code. If it can't wait, it should exit
#	with a non-zero exit code.
#
#	The interface program expects that ANY message on the
#	standard error from the filter indicates a printer fault.
#	Therefore, a filter should not put user (input) error
#	messages on the standard error, but on the standard output
#	(where the user can read them when he or she examines
#	the print-out).
#
#####

badfileyet=
EXIT_CODE=${TMPPREFIX}e
trap 'catch_hangup; echo 129 >${EXIT_CODE}; exit_code=129 exit 129' 1
trap 'catch_interrupt; echo 129 >${EXIT_CODE}; exit_code=129 exit 129' 2 3

##########
#
# Here's where we set up the $LPTELL program to capture
# fault messages. It is at the other end of the shell pipeline;
# the ``left-hand'' side of the pipeline is the following loop.
#
#	while [ $i -le $copies ]
#	do
#		...
#	done | ${LPTELL} ...
#
# WARNING: The standard output of the following loop is directed
# to $LPTELL, not the printer. To send something to the printer,
# direct it to channel 3. E.g. echo "output" 1>&3
#
# WARNING: Because this loop is the first in a pipeline, it is in
# a sub-shell. To propagate an exit code to the original shell,
# copy it into the file ${EXIT_CODE}.
##########
exec 3>&1
i=1
while [ $i -le $copies ]
do

	#####
	# Set FORMFEED to be a pipeline that will simulate a formfeed
	# if we don't have a real formfeed and want filebreaks.
	#####
	if [ -z "${FF}" -a "no" = "${nofilebreak}" -a -n "${LPPAGER}" ]
	then
		FORMFEED="${LPPAGER} ${length}"
	fi

	n=1
	for file in ${files}
	do

		#####
		# Set FORMFEED to be a pipeline that will simulate a
		# formfeed if we don't have a real formfeed and DON'T
		# want filebreaks--last file only.
		#####
		if [ \
			-z "${FF}" \
		     -a "yes" = "${nofilebreak}" \
		     -a -n "${LPPAGER}" \
		     -a "${n}" = "${nfiles}" \
		]
		then
			FORMFEED="${LPPAGER} ${length}"
		fi

		if [ -r "${file}" ]
		then
		   
			/inca/prog/taxspooler/itaxtcp nota "${file}" "${file}" -iUnix 2>>/tmp/itaxtcp.log

			#####
			# Here's where we print the file.
			# Put the 0<${file} before the "eval" to keep
			# clever users from giving a file name that
			# evaluates as something to execute (like LPTELL!)
			# We send the standard output of the
			# filter directly to the printer, while
			# piping the standard error to $LPTELL.
			#####
			trap '' 1	# Let the filter handle a hangup
			trap '' 2 3	# and interrupts
			if [ -z "${FORMFEED}" ]
			then
				0<${file} eval ${FILTER} 2>&1 1>&3
				exit_code=$?
			else
				exec 4>&1
				(
					0<${file} eval ${FILTER} 2>&4
					echo $? >${EXIT_CODE}
				) | eval ${FORMFEED} 1>&3
				exec 4>&-
				exit_code=`cat ${EXIT_CODE}`
			fi
			trap 'catch_hangup; echo 129 >${EXIT_CODE}; exit' 1
			trap 'catch_interrupt; echo 129 >${EXIT_CODE}; exit' 2 3

			if [ 0 != "${exit_code}" ]
			then
				trap '' 15
				sleep 4
				exit_code=129
				echo ${exit_code} >${EXIT_CODE}
				exit ${exit_code}
			fi

			if [ -n "${FF}" -a "no" = "${nofilebreak}" ]
			then
				echo "${CR}${FF}\c" 1>&3
			fi

		else

			#####
			#
			# Don't complain about not being able to read
			# a file on second and subsequent copies, unless
			# we've not complained yet. This removes repeated
			# messages about the same file yet reduces the
			# chance that the user can remove a file and not
			# know that we had trouble finding it.
			#####
			if [ "${i}" -le 1 -o -z "${badfileyet}" ]
			then
				errmsg WARNING ${E_IP_BADFILE} \
					"cannot read file \"${file}\"" \
					"see if the file still exists and is readable,
		or consult your system administrator;
		printing continues"
				badfileyet=yes
			fi

		fi
		n=`expr $n + 1`

	done
	i=`expr $i + 1`

done | ${LPTELL} ${printer}
exec 3>&-

exit_code=`cat ${EXIT_CODE} 2>/dev/null`
if [ -n "${exit_code}" -a 0 != "${exit_code}" ]
then
	exit ${exit_code}
fi

if [ -n "${FF}" -a "yes" = "${nofilebreak}" ]
then
	echo "${CR}${FF}\c"
fi

${DRAIN}

exit_code=0 exit 0