jpiccari

#!/bin/sh

if [ "$#" -ne 3 ] || ! [ -f "$1" ]; then
	# usage
	echo "$(basename $0) [file] [offset] [bytes]"
	exit 1
fi

bytes=$(printf "$3" | xxd -p)
printf $bytes | xxd -r -p | dd of="$1" seek=$(( $2 )) count=$(( ${#bytes} / 2 )) bs=1 conv=notrunc &> /dev/null