[Bash] find and backup files

Similar to previous post Check and backup but using the command of find. Also won't create the extra empty folders when backing up files with specified type.

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#!/bin/bash # to check whether the target folder contains same files as the source folder # Usage: #           findback.sh -s source_folder -t target_folder -name name_pattern -type filetype -copy #     e.g., #           findback.sh -s /mnt/mywork/mfiles -t /mnt/mybackup/mfiles -type f -name '*.m' -copy -sub #                             type: f--> regular file; d--> directory; l--> symbolic link [man find] #copyright @ http://scriptdemo.blogspot.com isSource=0 isTarget=0 isFiletype=0 isCopy=0 isSubFolder=0 isName=0; while [ $# -gt 0 ]; do      case $1 in        -t|-target)          [ ! -d $2 ] && echo " target folder: $2 does not exist" && exit          isTarget=1          tFolder=`echo $2 | sed 's/\/$//'`          shift;shift;          ;;        -s|-source)          [ ! -d $2 ] && echo " source folder: $2 does not exist" && exit          isSource=1          sFolder=`echo $2 | sed 's/\/$//'`          shift;shift;          ;;        -p|-pattern|-name)          isName=1;          namepattern=$2          shift; shift;          ;;        -filetype|-type)          isFiletype=1          filetype=$2          if [ ${filetype} != 'f' ] && [ ${filetype} != 'd' ] && [ ${filetype} != 'l' ]; then             echo "type option: ${filetype} is not supported yet"             exit          fi          shift;shift;          ;;        -copy|-COPY|-cp)          isCopy=1          shift          ;;        -sub|-all|-subfolder|-deeper)          isSubFolder=1          shift          ;;        *)         echo "unkown option: $1"         shift         ;;     esac done [ ${isName} -eq 0 ] && echo "-name option missing: No name-pattern is specified" && exit if [ ${isSource} -eq 0 ] && [ ${isTarget} -eq 0 ] ; then    echo "Usage: findback.sh -s source_foler -t target_folder -name name-pattern -type f -copy -sub"    echo " type: f--> regular file; d--> directory; l--> symbolic link"    exit fi if [ ${isSource} -eq 0 ] && [ ${isTarget} -eq 1 ]; then    sFolder=${PWD}    echo "--------------------------------------------"    echo "| source folder is set to current folder: $PWD"    echo "--------------------------------------------" fi if [ ${isSource} -eq 1 ] && [ ${isTarget} -eq 0 ]; then    tFolder=${PWD}    echo "--------------------------------------------"    echo "| target folder is set to current folder: $PWD"    echo "--------------------------------------------" fi if [ ${isFiletype} -eq 0 ]; then    filetype='f' fi if [ ${isSubFolder} -eq 1 ]; then    eval "mylist=( `find ${sFolder} -type ${filetype} -name "${namepattern}" 2< /dev/null` )" else    eval "mylist=( `find ${sFolder} -maxdepth 1 -type ${filetype} -name "${namepattern}" 2< /dev/null` )" fi sFoldersed=`echo ${sFolder} | sed 's/\//\\\\\//g'` tFoldersed=`echo ${tFolder} | sed 's/\//\\\\\//g'` if [ ${#mylist} -gt 0 ]; then    for fln in ${mylist[*]}    do       eval "tfln=\`echo ${fln} | sed 's/${sFoldersed}/${tFoldersed}/'\`"       if [ ${filetype} == 'f' ] || [ ${filetype} == 'l' ]; then          # get the path first          tflpath=`dirname ${tfln}`          if [ ! -d ${tflpath} ]; then             if [ ${isCopy} -eq 0 ]; then                echo -e "[testing] CREATE:\n[testing] mkdir -p ${tflpath}"             else                eval mkdir -p "${tflpath}"             fi          fi          if [ -e ${tfln} ]; then             isDiff=`diff -bB "${fln}" "${tfln}"`             if [ ${#isDiff} -gt 0 ]; then                if [ ${isCopy} -eq 1 ]; then                  echo -e "DIFF: ${tfln} is modified! copying...\n"                  eval cp -f "${fln}" "${tfln}"                else                  echo "[testing] DIFF: ${fln} is modified!"                fi             fi          else             if [ ${isCopy} -eq 1 ]; then                echo -e " copy: ${tfln} does not exist copying...\n"                eval cp -f "${fln}" "${tfln}"             else                echo -e "[testing] copy: ${tfln} does not exist\n"             fi          fi       elif [ ${filetype} == 'd' ]; then            if [ ! -d ${tfln} ]; then               if [ ${isCopy} -eq 0 ]; then                  echo -e "[testing] CREATE:\n[testing] mkdir -p ${tfln}"               else                  echo -e "CREATE:\n mkdir -p ${tfln}"                  mkdir -p "${tfln}"               fi            fi       fi    done else    echo "Nothing is found!"    exit fi