system_update.sh

#!/usr/bin/env bash

HACTOOL=./hactool.exe
UPDATES=`find . ! -name . -type d`

for updates in $UPDATES; do
	updates=`basename $updates`
	NCA=`find $updates -name '*.cnmt.nca'`
	for nca in $NCA; do
		TITLEID=`$HACTOOL -k keys.txt -t nca --listromfs $nca | grep "Title ID:" | grep 0100000000000809 | tr -s ' ' | cut -d' ' -f3`
		if [[ $TITLEID == 0100000000000809* ]]; then
			CNMT=`$HACTOOL -k keys.txt -t nca --section0dir=tmp_$updates $nca | grep "SystemData_" | tr -s ' ' | cut -d' ' -f4 | sed 's/\.\{2,\}//g'`
			VERSION=`od -t x4 --skip-bytes=8 --read-bytes=4 tmp_$updates/SystemData_0100000000000809.cnmt | head -1 | cut -d' ' -f2`
			rm -Rf tmp_$updates
			
			FIRMWARE=`echo -n $(((0x$VERSION >> 26) & 0x3F))"."$(((0x$VERSION >> 20) & 0x3F))"."$(((0x$VERSION >> 16) & 0x0F))`
			echo -e "$nca\t$FIRMWARE\t`printf "%d" 0x$VERSION`"
			break
		fi
	done
done