extract.sh

#!/bin/sh

PART=input.part

BLUE='\033[1;34m'
WHITE='\033[1;37m'
NC='\033[0m'

hd "$PART" | grep -E '^[0-9a-f]{8}  d0 0d fe ed' --line-buffered | \
	while read LINE; do
		echo "$WHITE$LINE$NC"

		OFFSET=`echo "$LINE" | cut -d' ' -f1`
		LENGTH=`echo "$LINE" | cut -d' ' -f7-10 | sed -e 's/ //g'`

		DTB="$OFFSET.dtb"
		DTS="$OFFSET.dts"

		echo "${BLUE}extracting $DTB$NC"
		OxOFFSET="0x$OFFSET"
		OxLENGTH="0x$LENGTH"
		dd if="$PART" of="$DTB" bs=1 skip=$((OxOFFSET)) count=$((OxLENGTH))

		echo -n "${BLUE}decompiling$NC"
		dtc "$DTB" -I dtb -o "$DTS" -O dts > /dev/null 2>&1
		echo " done"

		echo
	done

repack.sh

#!/bin/sh

PART=input.part
OUTPUT=output.part
cp "$PART" "$OUTPUT"
export PART="$OUTPUT"

BLUE='\033[1;34m'
WHITE='\033[1;37m'
NC='\033[0m'

hd "$PART" | grep -E '^[0-9a-f]{8}  d0 0d fe ed' --line-buffered | \
	while read LINE; do
		echo "$WHITE$LINE$NC"

		OFFSET=`echo "$LINE" | cut -d' ' -f1`
		LENGTH=`echo "$LINE" | cut -d' ' -f7-10 | sed -e 's/ //g'`

		DTB="$OFFSET.dtb"
		DTS="$OFFSET.dts"

		echo -n "${BLUE}compiling$NC"
		dtc "$DTS" -I dts -o "$DTB" -O dtb > /dev/null 2>&1
		echo " done"

		echo "${BLUE}injecting $DTB$NC"
		OxOFFSET="0x$OFFSET"
		dd conv=notrunc if="$DTB" of="$PART" bs=1 seek=$((OxOFFSET))

		echo
	done