makebook.sh

#!/bin/sh
# +AMDG  This document was begun just before Christmas,
# 2010, and it is humbly dedicated to St. Wulfric, patron of
# bookbinders, and to the Immaculate Heart of Mary for their
# prayers, and to the Sacred Heart of Jesus for His mercy.
#
#**********************************************************#
#                       makebook                           #
#  	     written by Donald P. Goodman III	 	   #
#		   Copyright (C) 2011			   #
#							   #
#	       Impose pdf pages for binding		   #
#**********************************************************#
#
# 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 3 of the License, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
# PURPOSE.  See the GNU General Public License for more
# details.
#
# For a full copy of the GNU General Public License, see
# <http://www.gnu.org/licenses/>.
#
#**********************************************************#
#                     begin the code                       #
#**********************************************************#
# make script more portable and secure
PATH=/bin:/usr/bin:/usr/local/bin ; export PATH
umask 033
# define our revision number variable for rcs
REVISION="2.1"
# define error codes
E_WRONG_ARGS=64		# too many or few args
E_BAD_SIG_TYPE=65	# invalid type of signature
E_BAD_UNIT=66		# unrecognized dimension unit used
E_BAD_FILENAME=67	# filename contains insecure chars,
			# or doesn't exist
E_BAD_OPT=68		# bad command-line flag requested
E_NO_PROG=69		# missing a required program
# define usage variables
VERBOSE=0		# 0 if not verbose, 1 if -v
SIG_TYPE="folio"	# type of section desired
PAGES_PER_SIG=4		# number of pages per signature
SECT_TYPE=1		# number of signatures per section
NUP="2x1"		# default format of signatures
FRONT_FAVOR=0		# favor front for blanks; off by default
# define various variables to be zero by default
TGT_PAGE_WIDTH=0
TGT_PAGE_HEIGHT=0
HORIZ_DELTA=0
VERT_DELTA=0
HORIZ_OFFSET=0
VERT_OFFSET=0
SCALE=1
# make sure user has the right programs installed, and die
# horribly if not
command -v od >/dev/null 2>&1 || 
	{ echo >&2 "makebook:  error:  requires od, but it's not installed";
	exit $E_NO_PROG;
	}
command -v pdflatex >/dev/null 2>&1 || 
	{ echo >&2 "makebook:  error:  requires pdflatex, but it's not installed";
	exit $E_NO_PROG;
	}
command -v pdfinfo >/dev/null 2>&1 || 
	{ echo >&2 "makebook:  error:  requires pdfinfo, but it's not installed";
	exit $E_NO_PROG;
	}
command -v pdftk >/dev/null 2>&1 || 
	{ echo >&2 "makebook:  error:  requires pdftk, but it's not installed";
	exit $E_NO_PROG;
	}
command -v dc >/dev/null 2>&1 || 
	{ echo >&2 "makebook:  error:  requires dc, but it's not installed";
	exit $E_NO_PROG;
	}
command -v bc >/dev/null 2>&1 || 
	{ echo >&2 "makebook:  error:  requires bc, but it's not installed";
	exit $E_NO_PROG;
	}

# print the version information and exit successfully
versionfunc ()
{
	echo "makebook v${REVISION}.  Copyright (C) 2011, Donald P."
	echo "Goodman III."
	echo "This program comes with ABSOLUTELY NO WARRANTY."
	echo "This is free software, and you are welcome to "
	echo "redistribute it under certain conditions; see "
	echo "the GNU GPL v3 for details."
	exit 0
}

# print the online help and exit successfully
helpfunc ()
{
cat <<End-of-help
makebook v${REVISION}.  Copyright (C) 2011, Donald P. Goodman III.
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to 
redistribute it under certain conditions; see 
the GNU GPL v3 for details.

-V:	Prints license and version information, then exits
	successfully.
-h:	Prints this help information, then exist successfully.
-v:	Verbose output
-f:	Favor front, rather than back, for blanks.
-t:	Signature type
-n:	Number of signatures per section.
-H:	Height of the target page.
-w:	Width of the target page.
-d:	Horizontal delta.
-D:	Vertical delta.
-m:	Horizontal offset.
-M:	Vertical offset.
-s:	Scaling of source pages to target page.
-i:	Input file.
-o:	Output file.

Please see the man page for complete documentation.
End-of-help
	exit 0;
}

# define a for dealing with units; convert to bp ()
unitarg ()
{
	if [ ! `echo "$1" | grep '^[\+\|-]*[0-9\.][0-9\.]*\(in\|cm\|pt\|mm\|bp\|pc\|$\)'` ]
	then
		echo "ERROR:  dimension \"$1\" not valid." >&2
		exit $E_BAD_UNIT
	fi	
	if [ `expr match "$1" '.*\(in\)'` ]
	then
		OPTARG=`echo "scale=0; ${1%in} * 72" | bc`
		OPTARG=${OPTARG%.*}
	elif [ `expr match "$1" '.*\(cm\)'` ]
	then
		OPTARG=`echo "scale=0; ${1%cm} * 28.3464567" | bc`
		OPTARG=${OPTARG%.*}
	elif [ `expr match "$1" '.*\(mm\)'` ]
	then
		OPTARG=`echo "scale=0; ${1%mm} * 2.83464567" | bc`
		OPTARG=${OPTARG%.*}
	elif [ `expr match "$1" '.*\(pt\)'` ]
	then
		OPTARG=`echo "scale=0; ${1%pt} / 1.00375" | bc`
		OPTARG=${OPTARG%.*}
	elif [ `expr match "$1" '.*\(pc\)'` ]
	then
		OPTARG=`echo "scale=0; (${1%pc} / 1.00375) * 12" | bc`
		OPTARG=${OPTARG%.*}
	elif [ `expr match "$1" '.*\(bp\)'` ]
	then
		OPTARG=${1%bp}
	else
		OPTARG=${1%.*}
	fi
}
# define a for dealing with section types; convert ()
# to words; e.g., "4to" to "quarto"
typearg ()
{
	if [ "$1" = "4to" ] || [ "$1" = "quarto" ]
	then
		PAGES_PER_SIG=8
		NUP="2x2"
		OPTARG="quarto"
	elif [ "$1" = "2o" ] || [ "$1" = "folio" ]
	then
		PAGES_PER_SIG=4
		NUP="2x1"
		OPTARG="folio"
	elif [ "$1" = "8vo" ] || [ "$1" = "octavo" ]
	then
		PAGES_PER_SIG=16
		NUP="4x2"
		OPTARG="octavo"
	elif [ "$1" = "6to" ] || [ "$1" = "sexto" ]
	then
		PAGES_PER_SIG=12
		NUP="2x3"
		OPTARG="sexto"
	elif [ "$1" = "12mo" ] || [ "$1" = "duodecimo" ]
	then
		PAGES_PER_SIG=24
		NUP="4x3"
		OPTARG="duodecimo"
	else
		echo "ERROR:  signature type \"$1\" not recognized." >&2
		exit $E_BAD_SIG_TYPE
	fi
}

# clean up filename argument
filefunc ()
{
	err_message="ERROR:  bad characters in file name."
	if [ `echo "$1" | grep '\?'` ]
	then
		echo "$err_message" >&2
		exit $E_BAD_FILENAME
	elif [ `echo "$1" | grep '\*'` ]
	then
		echo "$err_message" >&2
		exit $E_BAD_FILENAME
	elif [ `echo "$1" | grep '"'` ]
	then
		echo "$err_message" >&2
		exit $E_BAD_FILENAME
	elif [ `echo "$1" | grep ';'` ]
	then
		echo "$err_message" >&2
		exit $E_BAD_FILENAME
	elif [ `echo "$1" | grep '[\\]'` ]
	then
		echo "$err_message" >&2
		exit $E_BAD_FILENAME
	elif [ `echo "$1" | grep ' '` ]
	then
		echo "$err_message" >&2
		exit $E_BAD_FILENAME
	fi
	OPTARG=`basename $1`
}

# now identify and parse the options
while getopts "Vhvfn:t:H:w:d:D:m:M:s:i:o:" Option
do
	case $Option in
		V	) versionfunc;;
		h	) helpfunc;;
		v	) VERBOSE=1;;
		f	) FRONT_FAVOR=1;;
		n	) SECT_TYPE=$OPTARG;;
		t	) typearg "$OPTARG"; SIG_TYPE=$OPTARG;;
		H	) unitarg "$OPTARG"; TGT_PAGE_HEIGHT=$OPTARG;;
		w	) unitarg "$OPTARG"; TGT_PAGE_WIDTH=$OPTARG;;
		d	) unitarg "$OPTARG"; HORIZ_DELTA=$OPTARG;;
		D	) unitarg "$OPTARG"; VERT_DELTA=$OPTARG;;
		m	) unitarg "$OPTARG"; HORIZ_OFFSET=$OPTARG;;
		M	) unitarg "$OPTARG"; VERT_OFFSET=$OPTARG;;
		s	) SCALE=$OPTARG;;
		i	) filefunc "$OPTARG"; FILE_NAME=$OPTARG;;
		o	) filefunc "$OPTARG"; OUTFILE_NAME=$OPTARG;;
		*	) echo "ERROR:  unknown flag \
			\"$Option\"." >&2; exit $E_BAD_OPT;;
	esac
done

# make random file name to use for input
NEW_FILE_NAME="tmp_`od -An -N4 -t uL /dev/urandom | tr -d '\ '`.pdf"
# if input file specified, use file; if not, read stdin
if [ "$FILE_NAME" ]
then
	cp "$FILE_NAME" "$NEW_FILE_NAME"
else
	FILE_NAME="book.pdf"
	cat /dev/stdin > "$NEW_FILE_NAME"
fi
# declare holder variable for pdftk
tmp_name="tmp_`od -An -N4 -t uL /dev/urandom | tr -d '\ '`.pdf"
# if output file specified, use that; if not, name it; if
# "-", use stdout
[ "$OUTFILE_NAME" ] || OUTFILE_NAME="sigs_$FILE_NAME"
if [ "$OUTFILE_NAME" = "stdout" ]
then
	VERBOSE=0
fi
# print our introduction message
if [ $VERBOSE -eq 1 ]
then
	echo "makebook.  Copyright (C) 2011, Donald P.  Goodman III."
	echo "This program comes with ABSOLUTELY NO WARRANTY."
	echo "This is free software, and you are welcome to "
	echo "redistribute it under certain conditions; see "
	echo "the GNU GPL v3 for details."
	echo "IMPOSING pdf pages onto \"$OUTFILE_NAME\"..."
fi

# get some information about our source document
NUM_PAGES=`pdfinfo "$NEW_FILE_NAME" | awk '/Pages:/ {print $2}'`;
SRC_PAGE_WIDTH=`pdfinfo "$NEW_FILE_NAME" | awk '/Page\ size:/ {print $3}'`;
SRC_PAGE_HEIGHT=`pdfinfo "$NEW_FILE_NAME" | awk '/Page\ size:/ {print $5}'`;
# find the number of pages we'll have per signature
PAGES_PER_SIG=$(dc -e "$PAGES_PER_SIG $SECT_TYPE * p")
# determine if extra pages will be necessary
NUM_BLANKS=`expr $NUM_PAGES % $PAGES_PER_SIG`
if [ $NUM_BLANKS -ne 0 ]
then
	NUM_BLANKS=`expr $PAGES_PER_SIG - $NUM_BLANKS`
fi
tmp=`expr $NUM_PAGES + $NUM_BLANKS`
NUM_SIGS=`expr $tmp / $PAGES_PER_SIG`

# if extra pages are needed, generate blank page
if [ $NUM_BLANKS -gt 0 ] && [ ! -e "./blank.pdf" ]
then
	echo "\documentclass{article}" > blank.tex
	echo '\\thispagestyle{empty}' >> blank.tex
	echo "\usepackage[paperwidth=${SRC_PAGE_WIDTH}bp,paperheight="${SRC_PAGE_HEIGHT}bp"]{geometry}" >> blank.tex
	echo '\\begin{document}' >> blank.tex
	echo "\quad \\\\end{document}" >> blank.tex
	if [ $VERBOSE -eq 1 ]
	then
		echo "CREATING blank page to fill sections...";
	fi
	pdflatex blank.tex > /dev/null 2&>1
fi
# now insert blank pages as needed, preferring the back for
# odd numbers by default, front if stated
if [ $NUM_BLANKS -eq 1 ]
then
	if [ $VERBOSE -eq 1 ]
	then
		echo "INSERTING one blank page..."
	fi
	if [ $FRONT_FAVOR -eq 0 ]
	then
		pdftk A="$NEW_FILE_NAME" B=blank.pdf cat A1-end \
		B1 output "$tmp_name"
	else
		pdftk A="$NEW_FILE_NAME" B=blank.pdf cat B1 \
		A1-end output "$tmp_name"
	fi
	mv "$tmp_name" "$NEW_FILE_NAME"
else
#	tmp=`expr $NUM_BLANKS / 2`
#	START_BLANKS=${tmp/.*}
	START_BLANKS=`expr $NUM_BLANKS / 2`
	END_BLANKS=`expr $NUM_BLANKS - $START_BLANKS`
	if [ `expr $START_BLANKS % 2` -ne 0 ]; then : else
		START_BLANKS=`expr $START_BLANKS - 1`
		END_BLANKS=`expr $END_BLANKS + 1 `
	fi
	if [ $FRONT_FAVOR -eq 1 ]
	then
		tmp=$START_BLANKS
		START_BLANKS=$END_BLANKS
		END_BLANKS=$tmp
		if [ `expr $START_BLANKS % 2` -ne 0 ]; then : else
			START_BLANKS=`expr $START_BLANKS - 1`
			END_BLANKS=`expr $END_BLANKS + 1 `
		fi
	fi
	if [ $VERBOSE -eq 1 ]
	then
		echo "INSERTING $START_BLANKS blank pages at start..."
		echo "INSERTING $END_BLANKS blank pages at end...";
	fi
	i=0
	while [ $i -lt $START_BLANKS ]
	do
		pdftk A="$NEW_FILE_NAME" B=blank.pdf cat B1 A1-end output "$tmp_name"
		mv "$tmp_name" "$NEW_FILE_NAME"
		i=`expr $i + 1`
	done
	i=0
	while [ $i -lt $END_BLANKS ]
	do
		pdftk A="$NEW_FILE_NAME" B=blank.pdf cat A1-end B1 output "$tmp_name"
		mv "$tmp_name" "$NEW_FILE_NAME"
		i=`expr $i + 1`
	done
fi
# begin the imposing, announcing if appropriate
tmp=`expr $NUM_PAGES + $NUM_BLANKS`
if [ $VERBOSE -eq 1 ]
then
	echo "IMPOSING $NUM_PAGES pages ($tmp with blanks) on 
	$(dc -e "$NUM_SIGS $SECT_TYPE * p") signature(s) gathered in 
	sections of $SECT_TYPE signature(s) each...";
fi
# arrange the pages for impression on signatures
i=1
j=1
if [ $VERBOSE -eq 1 ]
then
	echo "REARRANGING pages...";
fi
while [ $j -le $NUM_SIGS ]
do
	if [ "$SIG_TYPE" = "quarto" ]
	then
		# determine size of target page
		if [ $TGT_PAGE_HEIGHT -eq 0 ]
		then
			TGT_PAGE_HEIGHT=$(dc -e "$SRC_PAGE_HEIGHT 2 * p")
		fi
		if [ $TGT_PAGE_WIDTH -eq 0 ]
		then
			TGT_PAGE_WIDTH=$(dc -e "$SRC_PAGE_WIDTH 2 * p")
		fi
		# do the rearranging
		k=$i; n=1; total=$(dc -e "$SECT_TYPE 8 * p"); m=$total
		while [ $n -le $SECT_TYPE ]
		do
			pdftk "$NEW_FILE_NAME" cat `expr $k + $m - 1` $k \
				`expr $k + $m - 4`south `expr $k + 3`south \
				`expr $k + 1` `expr $k + $m - 2` `expr $k + 2`south \
				`expr $k + $m - 3`south output ${tmp_name%.pdf}_$n;
			k=`expr $k + 4`; n=`expr $n + 1`; m=`expr $m - 8`
		done
		n=1
		while [ `expr $n + 0` -le $SECT_TYPE ]
		do
			if [ ! -e "$tmp_name" ]
			then
				pdftk A=${tmp_name%.pdf}_$n cat A1-end \
				output "$tmp_name"
			else
				pdftk A=$tmp_name B=${tmp_name%.pdf}_`expr $n` \
					cat A1-end B1-end output ${tmp_name}_tmp
				mv ${tmp_name}_tmp "$tmp_name"
			fi
			n=`expr $n + 1`
		done
		if [ $VERBOSE -eq 1 ]
		then
			echo "REARRANGING section number $j..."
		fi
		j=`expr $j + 1`;
		i=`expr $i + $total`;
	elif [ "$SIG_TYPE" = "folio" ]
	then
		# determine size of target page
		if [ 1 -eq "$(echo "${TGT_PAGE_HEIGHT} == 0" | bc)" ]
		then
			TGT_PAGE_HEIGHT=$(dc -e "$SRC_PAGE_HEIGHT 1 * p")
		fi
		if [ 1 -eq "$(echo "${TGT_PAGE_WIDTH} == 0" | bc)" ]
		then
			TGT_PAGE_WIDTH=$(dc -e "$SRC_PAGE_WIDTH 2 * p")
		fi
		# do the rearranging
		k=$i; n=1; total=$(dc -e "$SECT_TYPE 4 * p"); m=$total
		while [ $n -le $SECT_TYPE ]
		do
			pdftk "$NEW_FILE_NAME" cat `expr $k + $m - 1` \
				`expr $k` `expr $k + 1` `expr $k + $m - 2` \
				output ${tmp_name%.pdf}_$n;
			k=`expr $k + 2`; n=`expr $n + 1`; m=`expr $m - 4`
		done
		n=1
		while [ `expr $n + 0` -le $SECT_TYPE ]
		do
			if [ ! -e "$tmp_name" ]
			then
				pdftk A=${tmp_name%.pdf}_$n cat A1-end \
				output "$tmp_name"
			else
				pdftk A="$tmp_name" B=${tmp_name%.pdf}_`expr $n` \
					cat A1-end B1-end output ${tmp_name}_tmp
				mv ${tmp_name}_tmp "$tmp_name"
			fi
			n=`expr $n + 1`
		done
		if [ $VERBOSE -eq 1 ]
		then
			echo "REARRANGING section number $j..."
		fi
		j=`expr $j + 1`;
		i=`expr $i + $total`;
	elif [ "$SIG_TYPE" = "octavo" ]
	then
		# determine target page dimensions
		if [ 1 -eq "$(echo "${TGT_PAGE_HEIGHT} == 0" | bc)" ]
		then
			TGT_PAGE_HEIGHT=$(dc -e "$SRC_PAGE_HEIGHT 2 * p")
		fi
		if [ 1 -eq "$(echo "${TGT_PAGE_WIDTH} == 0" | bc)" ]
		then
			TGT_PAGE_WIDTH=$(dc -e "$SRC_PAGE_WIDTH 4 * p")
		fi
		# do the rearranging
		k=$i; n=1; total=$(dc -e "$SECT_TYPE 16 * p"); m=$total
		while [ $n -le $SECT_TYPE ]
		do
			pdftk "$NEW_FILE_NAME" cat `expr $k + 3` \
				`expr $k + $m - 4` `expr $k + $m - 1` $k \
				`expr $k + 4`south `expr $k + $m - 5`south \
				`expr $k + $m  - 8`south `expr $k + 7`south \
				`expr $k + 1` `expr $k + $m - 2` `expr $k + $m - 3` \
				`expr $k + 2` `expr $k + 6`south `expr $k + $m - 7`south \
				`expr $k + $m - 6`south `expr $k + 5`south \
				output ${tmp_name%.pdf}_$n;
			k=`expr $k + 8`; n=`expr $n + 1`; m=`expr $m - 16`
		done
		n=1
		while [ `expr $n + 0` -le $SECT_TYPE ]
		do
			if [ ! -e "$tmp_name" ]
			then
				pdftk A=${tmp_name%.pdf}_$n cat A1-end \
				output "$tmp_name"
			else
				pdftk A="$tmp_name" B=${tmp_name%.pdf}_`expr $n` \
					cat A1-end B1-end output ${tmp_name}_tmp
				mv ${tmp_name}_tmp "$tmp_name"
			fi
			n=`expr $n + 1`
		done
		if [ $VERBOSE -eq 1 ]
		then
			echo "REARRANGING section number $j..."
		fi
		j=`expr $j + 1`;
		i=`expr $i + $total`;
	elif [ "$SIG_TYPE" = "sexto" ]
	then
		# determine target page dimensions
		if [ $TGT_PAGE_HEIGHT -eq 0 ]
		then
			TGT_PAGE_HEIGHT=$(dc -e "$SRC_PAGE_HEIGHT 3 * p")
		fi
		if [ $TGT_PAGE_WIDTH -eq 0 ]
		then
			TGT_PAGE_WIDTH=$(dc -e "$SRC_PAGE_WIDTH 2 * p")
		fi
		# do the rearranging
		k=$i; n=1; total=$(dc -e "$SECT_TYPE 12 * p"); m=$total
		while [ $n -le $SECT_TYPE ]
		do
			pdftk "$NEW_FILE_NAME" cat `expr $k + 5` \
				`expr $k + 6` `expr $k + $m - 1` $k \
				`expr $k + $m - 1 - 3`south `expr $k + 3`south \
				`expr $k + 7` `expr $k + 4` \
				`expr $k + 1` `expr $k + $m - 1 - 1` \
				`expr $k + 2`south `expr $k + $m - 1 - 2`south \
				output ${tmp_name%.pdf}_$n;
			k=`expr $k + 6`; n=`expr $n + 1`; m=`expr $m - 12`
		done
		n=1
		while [ `expr $n + 0` -le $SECT_TYPE ]
		do
			if [ ! -e "$tmp_name" ]
			then
				pdftk A=${tmp_name%.pdf}_$n cat A1-end \
				output "$tmp_name"
			else
				pdftk A=$tmp_name B=${tmp_name%.pdf}_`expr $n` \
					cat A1-end B1-end output ${tmp_name}_tmp
				mv ${tmp_name}_tmp "$tmp_name"
			fi
			n=`expr $n + 1`
		done
		if [ $VERBOSE -eq 1 ]
		then
			echo "REARRANGING section number $j..."
		fi
		j=`expr $j + 1`;
		i=`expr $i + $total`;
	elif [ "$SIG_TYPE" = "duodecimo" ]
	then
		# determine target page dimensions
		if [ $TGT_PAGE_HEIGHT -eq 0 ]
		then
			TGT_PAGE_HEIGHT=$(dc -e "$SRC_PAGE_HEIGHT 3 * p")
		fi
		if [ $TGT_PAGE_WIDTH -eq 0 ]
		then
			TGT_PAGE_WIDTH=$(dc -e "$SRC_PAGE_WIDTH 4 * p")
		fi
		# do the rearranging
		k=$i; n=1; total=$(dc -e "$SECT_TYPE 24 * p"); m=$total
		while [ $n -le $SECT_TYPE ]
		do
			pdftk "$NEW_FILE_NAME" cat `expr $k + 8` \
				`expr $k + $m - 1 - 8` `expr $k + 12` \
				`expr $k + 11` `expr $k + 4` \
				`expr $k + $m - 1 - 3` `expr $k + $m - 1` \
				$k `expr $k + 4`south `expr $k + $m - 1 - 4`south \
				`expr $k + $m - 1 - 7`south `expr $k + 7`south \
				`expr $k + 10` `expr $k + 13` `expr $k + 14` \
				`expr $k + 9` `expr $k + 1` `expr $k + $m - 1 - 1` \
				`expr $k + $m - 1 - 2` `expr $k + 2` \
				`expr $k + 6`south `expr $k + $m - 1 - 6`south \
				`expr $k + $m - 1 - 5`south `expr $k + 5`south \
				output ${tmp_name%.pdf}_$n;
			k=`expr $k + 12`; n=`expr $n + 1`; m=`expr $m - 24`
		done
		n=1
		while [ `expr $n + 0` -le $SECT_TYPE ]
		do
			if [ ! -e "$tmp_name" ]
			then
				pdftk A=${tmp_name%.pdf}_$n cat A1-end \
				output $tmp_name
			else
				pdftk A="$tmp_name" B=${tmp_name%.pdf}_`expr $n` \
					cat A1-end B1-end output ${tmp_name}_tmp
				mv ${tmp_name}_tmp "$tmp_name"
			fi
			n=`expr $n + 1`
		done
		if [ $VERBOSE -eq 1 ]
		then
			echo "REARRANGING section number $j..."
		fi
		j=`expr $j + 1`;
		i=`expr $i + $total`;
	fi
done
mv "$tmp_name" "$NEW_FILE_NAME"
rm ${tmp_name%.pdf}*
echo "\documentclass{article}
	\usepackage{pdfpages}
	\usepackage[paperwidth=${TGT_PAGE_WIDTH}bp,paperheight=${TGT_PAGE_HEIGHT}bp]{geometry}
	\pagestyle{empty}" > ${OUTFILE_NAME%.pdf}.tex
echo '\\begin{document}' >> ${OUTFILE_NAME%.pdf}.tex
echo "\includepdf[nup=$NUP,pages=-,turn=false,columnstrict,
	noautoscale,delta=${HORIZ_DELTA}bp ${VERT_DELTA}bp,
	offset=${HORIZ_OFFSET}bp ${VERT_OFFSET}bp,scale=${SCALE}]
	{./"$NEW_FILE_NAME"}" >> ${OUTFILE_NAME%.pdf}.tex
echo "\\\\end{document}" >> ${OUTFILE_NAME%.pdf}.tex
if [ $VERBOSE -eq 1 ]
then
	echo "IMPOSING sections..."
fi
pdflatex ${OUTFILE_NAME%.pdf}.tex > /dev/null 2>&1
if [ $VERBOSE -eq 1 ]
then
	echo "CLEANING up..."
fi
rm ${OUTFILE_NAME%.pdf}.tex ${OUTFILE_NAME%.pdf}.aux \
	${OUTFILE_NAME%.pdf}.log "$NEW_FILE_NAME"
if [ -e "./blank.tex" ]; then
	rm ./blank.tex
fi
if [ -e "./blank.aux" ]; then
	rm ./blank.aux
fi
if [ -e "./blank.log" ]; then
	rm ./blank.log
fi
if [ $VERBOSE -eq 1 ]
then
	echo "`expr $NUM_PAGES + $NUM_BLANKS` pages imposed in
	$(dc -e "$NUM_SIGS $SECT_TYPE * p") $SIG_TYPE signatures gathered 
	in sections of $SECT_TYPE signature(s) each and output to 
	${OUTFILE_NAME%.pdf}.pdf."
fi
if [ "$OUTFILE_NAME" = "stdout" ]
then
	cat ${OUTFILE_NAME}.pdf
	rm ${OUTFILE_NAME}.pdf
fi
exit 0