Extract all *.rar files in a directory

extract_all.sh

#!/bin/bash

# @author   Cole Turner
# @website  http://coleturner.me/

# @readme   This script will extract all .rar files in a directory
#           while preserving the original files. If "unrar.lock" is
#           present in the directory, the archive will be skipped.
#           If the rar was previously extracted and "unrar.lock" is
#           not present, it will be extracted again.
#
# @license  ¯\_(ツ)_/¯

#### PARAMETERS ####
WORKING_DIR=/tmp
NOW=$(date +%d.%m.%Y\ %H:%M:%S)
LOGFILE=/var/log/unrar.log
UNRAR=$(which unrar)


find "${WORKING_DIR}" -iname "*.rar" | while read archive;
do
        BASENAME=$(dirname "${archive}")

        if [ -d "${BASENAME}" ]
        then
                if [ ! -f "${BASENAME}/unrar.lock" ]
                then
                        tee >(logger) <<< "Found archive to extract ${archive}"
                        ${UNRAR} x -y "${archive}" ${BASENAME} 
                        touch ${BASENAME}/unrar.lock

                        tee >(logger) <<< "${NOW}: Extracted {$archive}" >> $LOGFILE
                fi
        fi

done

I have a raspberry pi running with a samba server. Extracting RAR files over SMB is painfully slow and I found myself needing to frequently ssh into do extraction. This script is useful on an hourly CRON to auto-extract the archives from the working directory.