#!/bin/sh

do_extract() {
	# List the files and check if grep hits something
	SEARCH=`tar -tvf $1 | grep $2`
	RES=$?
	if [ $RES = 0 ]; then
		tar --transform='s,^content/,,' -C / -xvf $1 $2
	else
		echo "Directory '$2' is not in backup '$1'."
	fi
}

do_restore_files() {
	BACKUP_FILE=$1
	if [ ! -e "$BACKUP_FILE" ] ; then
		echo "The backup file '$BACKUP_FILE' does not exist. Exiting!"
		exit 1
	fi

	echo "Going to extract files from the backup '$BACKUP_FILE'"
	do_extract $BACKUP_FILE content/etc
	do_extract $BACKUP_FILE content/var/lib/osmocom
}

do_restore_files $1