ddrescueFdd.sh

#!/bin/sh

containsErrors ()
{
	localLogFile="$1"
	errorCount=$(cat "$localLogFile" | egrep -v '(^#|^\s*$)' | grep --count --regexp=-)
	if [ $errorCount -gt 0 ]
	then
		return 0
	else
		return 1
	fi
}

ddrescueFdd()
{
	if [ -b "$1" ]
	then
		source="$1"
		shift
	else
		echo "arg[0] != block device" >/dev/stderr
		exit 1
	fi

	if [ -f "$1" ]
	then
		fileName="${1%.img}"
		preDefinedFileName=1
		shift
	else
		fileName=$(date +%Y%m%d%H%M%S)-$(uuidgen)
		preDefinedFileName=0
	fi


	imgFile="$fileName.img"
	logFile="$fileName.log"
	sha1File="$fileName.sha1"


	ddrescue                                            \
		--direct   --block-size=512                     \
		"$source"  "$imgFile"  "$logFile"  "$@"

	containsErrors             "$logFile"  &&           \
	ddrescue                                            \
		--direct   --block-size=512        --retrim     \
		"$source"  "$imgFile"  "$logFile"  "$@"

	containsErrors             "$logFile"  &&           \
	ddrescue                                            \
		--direct   --block-size=512        --retrim     \
		--reverse  --max-retries=3                      \
		"$source"  "$imgFile"  "$logFile"  "$@"


	if containsErrors "$logFile"
	then
		target=broken
	else
		sha1sum    "$imgFile"   >           "$sha1File"
		chmod -w   "$imgFile"   "$logFile"  "$sha1File"
		target=healthy
	fi


	read -p "New FileName [$fileName]: " newFileName
	newFileName=${newFileName:-$fileName}


	mv  "$imgFile"   "$target/$newFileName.img"
	mv  "$logFile"   "$target/$newFileName.log"
	[ -f "$sha1File" ] &&                               \
	mv  "$sha1File"  "$target/$newFileName.sha1"


	if [ "$target" = "healthy" ]
	then
		if eraseDisk
		then
			ufiformat --verify --format 1440 "$source"
			dd if=/dev/zero "of=$source" bs=64k
		fi
	fi
}

eraseDisk()
{
	read -p "Erase $source Yes/No? [N]: " erase
	erase=${erase:-N}
	if [ "Y" = "$nextDisk" -o "Yes" = "$nextDisk" -o "y" = "$nextDisk" -o "yes" = "$nextDisk" ]
	then
		return 0
	else
		return 1
	fi
}

nextDisk()
{
	read -p "Next disk Yes/No? [Y]: " nextDisk
	nextDisk=${nextDisk:-Y}
	if [ "Y" = "$nextDisk" -o "Yes" = "$nextDisk" -o "y" = "$nextDisk" -o "yes" = "$nextDisk" ]
	then
		return 0
	else
		return 1
	fi
}

ddrescueFdd "$@"
while nextDisk
do
	ddrescueFdd "$@"
done