#!/bin/bash
#
# A script to rescue data recursively using ddrescue.

srcDir=/damaged/hdd/movies/              #the source directory
desDir=/new/hdd/movies/                 #the destination directory
workDir=/new/hdd/movies/ddrescue        #location to store logs and working files

#preamble: I have already run rsync to copy files, but some failed part way through.

`rsync -rvn --size-only $srcDir* $desDir | sed "/speedup/d" | sed "/bytes\/sec/d" | sed "/sending\ incremental/d" | sed "/^$/d" > $workDir/work` #use rsync to generate list of partially transferred files.

workLength=`cat $workDir/work | wc -l`        #Find number of files in list.  For use with incrementing.
bookmark=0                    #Begin at first entry in list.

while [ $bookmark -lt $workLength ]
do
    bookmark=`expr $bookmark + 1`        #increment through the list
    currJob=`cat $workDir/work | sed -n ''$bookmark'p' | sed 's/\ /\\\ /g'`    #extract nth filename from list, replace spaces with "\ "
    echo "Start Rescue on " $currJob >> $workDir/runlog    #

    from=`echo $srcDir$currJob`        #creates full filename for source file,
    to=`echo $desDir$currJob`        #destination file,
    log=`echo $workDir/ddlog-$bookmark`    #and ddrescue log file.
    
    `ddrescue $from $to $log > $workDir/ddoutput-$bookmark` #run ddrescue, dumping output to file.
    cat $workDir/ddoutput-$bookmark | grep -B 2 Finished | grep errors >> $workDir/runlog    #read last 3 lines from ddrescue output and record it in runlog, so user can check which files are missing bits.
    echo -e "\n"
done
exit

ddrescue: too many files

ddrescue: cannot open input file: No such file or directory