+
+if [ "$luksheaders" == "yes" ]; then
+ devices=`LC_ALL=C $SFDISK -l 2>/dev/null | grep "^Disk /dev" | @AWK@ '{print $2}' | cut -d: -f1`
+ [ -n "$devices" ] || warning "No block device found"
+ targetdevices=""
+ for dev in $devices; do
+ [ -b $dev ] || continue
+ debug "$CRYPTSETUP isLuks $dev"
+ $CRYPTSETUP isLuks $dev
+ [ $? -eq 0 ] && targetdevices="$targetdevices $dev"
+ done
+ for dev in $targetdevices; do
+ label=${dev#/dev/}
+ label=${label//\//-}
+ outputfile=${luksheadersfile//__star__/$label}
+ # the following sizes are expressed in terms of 512-byte sectors
+ debug "Let us find out the Luks header size for $dev"
+ debug "$CRYPTSETUP luksDump \"$dev\" | grep '^Payload offset:' | @AWK@ '{print $3}'"
+ headersize=`$CRYPTSETUP luksDump "$dev" | grep '^Payload offset:' | @AWK@ '{print $3}'`
+ if [ $? -ne 0 ]; then
+ warning "Could not compute the size of Luks header, skipping device $dev"
+ continue
+ elif [ -z "$headersize" -o -n "`echo \"$headersize\" | sed 's/[0-9]*//g'`" ]; then
+ warning "The computed size of Luks header is not an integer, skipping device $dev"
+ continue
+ fi
+ debug "Let us backup the Luks header of device $dev"
+ debug "$DD if=\"${dev}\" of=\"${outputfile}\" bs=512 count=\"${headersize}\""
+ output=`$DD if="${dev}" of="${outputfile}" bs=512 count="${headersize}" 2>&1`
+ exit_code=$?
+ if [ $exit_code -eq 0 ]; then
+ debug $output
+ info "The Luks header of $dev was saved to $outputfile."
+ else
+ debug $output
+ fatal "The Luks header of $dev could not be saved."
+ fi
+ done
+fi