[Bash] combine eps files into a single one

#!/bin/bash #  to combine several eps files into a single eps file # Usage: #        combineEPS.sh eps-file[s] -o eps-combined.eps -nC nCol -nR nRow # e.g., #        Given fig04a.eps, fig04b.eps, fig04c.eps, fig04d.eps, #        to create a single 2x2 eps file, fig4.eps, just run: #        combineEPS.sh fig04?.eps -o fig4.eps -nC 2 -nR 2 #         # dependencies: #        latex, dvips, ps2pdf, pdftops, pdfcrop #        pdfcrop is from http://pdfcrop.sourceforge.net #        http://scriptdemo.blogspot.ca chkcmd() {   for nf in $*   do      isAvailable=`which ${nf} 2< /dev/null`      [ ${#isAvailable} -eq 0 ] && echo 0 && exit   done   echo 1 } # check the dependencies isCMDOkay=`chkcmd latex dvips ps2pdf pdfcrop pdftops` if [ ${isCMDOkay} -eq 0 ]; then    isCMDOay=`which latex`    isCMDOay=`which dvips`    isCMDOay=`which ps2pdf`    isCMDOay=`which pdfcrop`    isCMDOay=`which pdftops`    exit fi nfile=0 isEPSFname=0 isnCol=0 isnRow=0 isDel=0 isCaption=0 [ $# -eq 0 ] && sed -n '2,9p' `which combineEPS.sh` && exit while test -n "$1" do   case "$1" in     -nC|-nc|-nCol|-ncol|-Ncol)        nCol=$2        isnCol=1        shift        shift        ;;     -nR|-nr|-nRow|-Nrow|-nrow)        nRow=$2        isnRow=1        shift        shift        ;;     -title|-Title|-Caption|-caption)        myCaption=$2        isCaption=1        shift        shift        ;;     -d|-delete|-del|-D)        isDel=1;        shift        ;;     -o|-O)        epsfname=$2        isEPSFname=1        shift        shift        ;;      *)        sufstr=`echo $1 | awk -F. '{print $2}'`        if [ ${#sufstr} -eq 0 ]; then           tmpfile="$1".eps           [ -f ${tmpfile} ] && epsfile[$nfile]=${tmpfile}.eps        elif [ $sufstr == "eps" ]; then           [ -f $1 ] && epsfile[$nfile]=$1        fi        nfile=`expr $nfile + 1`        shift        ;;   esac done [ ${isEPSFname} -eq 0 ] && epsfname="eps-combined.eps" if [ ${isnCol} -eq 1 ] && [ ${isnRow} -eq 0 ]; then    nRow=`echo "${nfile}/${nCol}" | bc -l | awk '{ if ($1 == int($1)) {printf "%d\n", $1} else { if ($1>0) {printf "%d\n",int($1)+1 } else {printf "%d\n",int($1)} } }'` fi if [ ${isnRow} -eq 1 ] && [ ${isnCol} -eq 0 ]; then    nCol=`echo "${nfile}/${nRow}" | bc -l | awk '{ if ($1 == int($1)) {printf "%d\n", $1} else { if ($1>0) {print "%d\n",int($1)+1 } else {printf "%d\n",int($1)} } }'` fi if [ $isnRow -eq 0 ] && [ $isnCol -eq 0 ]; then    nCol=1    nRow=${nfile} fi colstr=`printf "%*s\n" ${nCol} " " | sed -e 's/\ /c/g'` nwidth=$(printf "%.2f\n" `echo "1/${nCol}" | bc -l`) [ ${nwidth} == "1.00" ] && nwidth="" #echo -e "nCol=${nCol}\nnRow=${nRow}\nnWid=${nwidth}" # header of tex file texfile=${epsfname%.*}.tex dvifile=${epsfname%.*}.dvi psfile=${epsfname%.*}.ps logfile=${epsfname%.*}.log auxfile=${epsfname%.*}.aux pdfname=${epsfname%.*}.pdf header[0]='\documentclass[letterpaper,12pt]{article}' header[1]='\usepackage{epsfig}' header[2]='\begin{document}' header[3]='\thispagestyle{empty}' header[4]='\begin{figure}' header[5]='\centering' header[6]="\begin{tabular}{${colstr}}" printf "%s\n" ${header[*]} > ${texfile} n=0 nfileC=`expr ${nfile} - 1` for nL in `seq 1 ${nRow}` do     for nC in `seq 1 ${nCol}`     do        if [ $n -lt ${nfile} ]; then           epsname=${epsfile[$n]}           if [ ${nC} -eq ${nCol} ]; then              if [ ${nL} -eq ${nRow} ]; then                 tmpstr=""              else                 tmpstr=" \\\\"              fi           else              tmpstr=" &"           fi           [ ${n} -eq ${nfileC} ] && tmpstr=""           figline[$n]="\epsfig{file=${epsname},width=${nwidth}\linewidth,clip=}${tmpstr}"           #printf "%s\n" "${figline[$n]}" >> ${texfile}           n=`expr $n + 1`        fi     done done printf "%s %s\n" ${figline[*]} >> ${texfile} # tail of tex file mytail[0]="\end{tabular}" if [ ${isCaption} -eq 1 ]; then    mytail[1]="\caption${myCaption}" else    mytail[1]="" fi mytail[2]="\end{figure}" mytail[3]="\end{document}" printf "%s\n" ${mytail[*]} >> ${texfile} #compile the tex file latex ${texfile} dvips -t letter -Ppdf -o ${psfile} ${dvifile} && rm -f ${dvifile} ps2pdf ${psfile} && rm -f ${psfile} ${auxfile} ${logfile} [ ${isDel} -eq 1 ] && rm -f ${texfile} # crop the pdf file pdfname=${epsfname%.*}.pdf pdfcrop ${pdfname} && mv ${pdfname%.*}-crop.pdf ${pdfname} && pdftops -eps ${pdfname} ${epsfname}

[Bash] Check the existence of a command

#!/bin/bash # check the existence of a command [ base on the returns of which and alias ] # usage: #           chkcmd.sh command-list # e.g., #           chkcmd.sh pdfit #           http://scriptdemo.blogspot.ca source ~/.bashrc if [ $# -eq 0 ]; then    sed -n '2,6p' `which chkcmd.sh`    exit else    for mycmd in $*    do       isInPath=`which ${mycmd} 2< /dev/null`       if [ ${#isInPath} -eq 0 ]; then          isAlias=`alias ${mycmd} 2< /dev/null`          if [ ${#isAlias} -eq 0 ]; then             echo "${mycmd} is not in the path";          else             echo "${mycmd} is an aliased command";          fi       else          echo "${mycmd} is in the path";       fi    done fi

[Bash] extract pages from a pdf file using gs

#!/bin/bash # extract pages from a big pdf file using gs # Usage: #           pdfselect.sh pdffile startPageNumber endPageNumber #           http://scriptdemo.blogspot.ca function getPDFPages() {    if [ -e $1 ]; then       pdfinfo $1 | grep "Pages" | awk '{print $2}'    else       echo 0;    fi } if [ $# -lt 2 ]; then    sed -n '3,4p' `which pdfselect.sh`    exit fi oriPdf=$1 [ ! -e ${oriPdf} ] && echo "${oriPdf} does not exist! " && exit numPage=`getPDFPages ${oriPdf}` [ ${numPage} -eq 0 ] && "ZERO page is found in ${oriPdf}" && exit sPage=$2 [ ${sPage} -gt ${numPage} ] && ${sPage}=${numPage} if [ $# -eq 2 ]; then    ePage=${sPage} else    ePage=$3; fi [ ${ePage} -gt ${numPage} ] && ${ePage}=${numPage} if [ $# -lt 4 ]; then    outPdf="p${sPage}_${ePage}_${oriPdf}" else    outPdf=$4 fi eval "gs -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -dSAFER -dFirstPage=${sPage} -dLastPage=${ePage} -sOutputFile=${outPdf} ${oriPdf}"