#!/bin/bash

#Usage: mergefile

PROGRAMNAME=$(basename $0)
PREFIX='SPLITTED_FILE'

if [[ $# != 0 ]]; then
	echo "Usage: $PROGRAMNAME. No arguments (SPLITTED_TAR.tar will be merged)"
	exit 1
fi

FILENAME=""

if [[ -f 'SPLITTED_TAR.tar' ]]; then
	tar -xf 'SPLITTED_TAR.tar'
	FILENAME=$(cut -f 3 -d " " SPLITTED_CHECK_SHA256SUM)
	cat ./SPLITTED_FILE* > $FILENAME
	if [[ $(sha256sum $FILENAME | cut -f 3 -d " ") == $(cut -f 3 -d " " SPLITTED_CHECK_SHA256SUM) ]]; then
		echo "SHASUM Checks!"
	else
		echo "File corrupted (SHASUM doesn't check!)"

#!/bin/bash

#Usage: splitter [FILENAME] [SIZE]

PROGRAMNAME=$(basename $0)
PREFIX='SPLITTED_FILE'

if [[ $# != 2 ]]; then
	echo "Usage: $PROGRAMNAME [FILENAME] [SIZE]"
	exit 1
fi

FILENAME=$1
SIZE=$2

if [[ -f $FILENAME ]]; then
	if [[ $SIZE =~ ^[0-9]+$ && $SIZE != 0 ]]; then
		sha256sum $FILENAME > SPLITTED_CHECK_SHA256SUM
		split -b ${SIZE}'M' $FILENAME $PREFIX
		tar -cf SPLITTED_TAR.tar SPLITTED_FILE* SPLITTED_CHECK_SHA256SUM
		echo "Done."
		exit
	else
		echo "$PROGRAMNAME: Invalid size"
		exit 1