showdiff() {
	BASENAME=$(basename $i .new)
	FILEPATH=$(dirname $i)
	FULLNAME="${FILEPATH}/${BASENAME}"

	if [ -e ${FULLNAME} ]; then
	    diff -u ${FULLNAME} ${FULLNAME}.new | $MORECMD
	else
	    echo "file $FULLNAME doesn't exist"
	fi
}

showmenu() {
	echo -e "$1 - \c"
	tput sc
	shift
	while [ $# -gt 0 ]; do
		echo -e "$1"
		tput rc
		shift
	done
}

mergenew() {
	BASENAME=$(basename $i .new)
	FILEPATH=$(dirname $i)
	FULLNAME="${FILEPATH}/${BASENAME}"

	if [ -e "${FULLNAME}" ]; then
		# in media res. we do the merging right away, but we later allow the user to redo it, if not satisfied with the results.
		rm -f "${FULLNAME}.smerge"
		echo "Enter '?' in the prompt (%) to display help."
		cp -p "${FULLNAME}.new" "${FULLNAME}.smerge" # <- this is so that the installed merged file will have the same permissions as the .new file
		sdiff -s -o "${FULLNAME}.smerge" "${FULLNAME}" "${FULLNAME}.new"

		GOEXM=0
		while [ $GOEXM -eq 0 ]; do
			showmenu $i "(E)dit the merged file" "(I)nstall the merged file" "View a diff between the merged and the (N)ew file" "View a diff between the (O)ld and the merged file" "(R)edo the merge" "(V)iew the merged file" "(B)ack to previous menu, and delete the merged file"
			read ANSWER
			case "$ANSWER" in
				E|e)
					if [ -f "${FULLNAME}.smerge" ]; then
						$EDITCMD "${FULLNAME}.smerge"
					else
						echo -e "Nothing was merged yet..."
					fi
				;;
				I|i)
					if [ -f "${FULLNAME}.smerge" ]; then
						if [ -e "${FULLNAME}" ]; then
							mv "${FULLNAME}" "${FULLNAME}.orig"
						fi
						mv "${FULLNAME}.smerge" "${FULLNAME}"
						rm -f "${FULLNAME}.new"
						GOEXM=1
						GOEX=1
					else
						echo -e "Nothing was merged yet..."
					fi
				;;
				N|n)
					if [ -f "${FULLNAME}.smerge" ]; then
						diff -u "${FULLNAME}.smerge" "${FULLNAME}.new" | $MORECMD
					else
						echo -e "Nothing was merged yet..."
					fi
				;;
				O|o)
					if [ -f "${FULLNAME}.smerge" ]; then
						diff -u "${FULLNAME}" "${FULLNAME}.smerge" | $MORECMD
					else
						echo -e "Nothing was merged yet..."
					fi
				;;
				R|r)
					rm -f "${FULLNAME}.smerge"
					echo "Enter '?' in the prompt (%) to display help."
					cp -p "${FULLNAME}.new" "${FULLNAME}.smerge" # <- this is so that the installed merged file will have the same permissions as the .new file
					sdiff -s -o "${FULLNAME}.smerge" "${FULLNAME}" "${FULLNAME}.new"
				;;
				V|v)
					if [ -f "${FULLNAME}.smerge" ]; then
						$MORECMD "${FULLNAME}.smerge"
					else
						echo -e "Nothing was merged yet..."
					fi
				;;
				B|b)
					rm -f "${FULLNAME}.smerge"
					GOEXM=1
				;;
			esac
		done
	else
		echo "file $FULLNAME doesn't exist"
	fi
}

overold() {
	BASENAME=$(basename $i .new)
	FILEPATH=$(dirname $i)
	FULLNAME="${FILEPATH}/${BASENAME}"

	if [ -e ${FULLNAME} ]; then
	    mv ${FULLNAME} ${FULLNAME}.orig
	fi
	mv ${FULLNAME}.new ${FULLNAME}
}

removeold() {
	rm $i
}

looknew() {

	# with ONLY_NEW_DOTNEW set, slackpkg will search only for
	# .new files installed in actual slackpkg's execution
	if [ "$ONLY_NEW_DOTNEW" = "on" ]; then
		ONLY_NEW_DOTNEW="-cnewer $TMPDIR/timestamp"
	else
		ONLY_NEW_DOTNEW=""
	fi

	echo -e "\nSearching for NEW configuration files"
	FILES=$(find /etc /var/yp /usr/share/vim -name "*.new" ${ONLY_NEW_DOTNEW} \
		-not -name "rc.inet1.conf.new" \
		-not -name "group.new" \
		-not -name "passwd.new" \
		-not -name "shadow.new" \
		-not -name "gshadow.new" 2>/dev/null)
	if [ "$FILES" != "" ]; then
		echo -e "\n\
Some packages had new configuration files installed.
You have four choices:

	(K)eep the old files and consider .new files later

	(O)verwrite all old files with the new ones. The
	   old files will be stored with the suffix .orig

	(R)emove all .new files

	(P)rompt K, O, R selection for every single file
	
What do you want (K/O/R/P)?"
		answer	
		case $ANSWER in
			K|k)
				break
			;;
			O|o)
				for i in $FILES; do
					overold $i
				done
				break
			;;
			R|r)
				for i in $FILES; do
					removeold $i
				done
				break
			;;
			P|p)
				echo "Select what you want file-by-file"
				for i in $FILES; do
					GOEX=0
					while [ $GOEX -eq 0 ]; do
						echo
						showmenu $i "(K)eep" "(O)verwrite" "(R)emove" "(D)iff" "(M)erge"
						read ANSWER
						case $ANSWER in
							O|o)
								overold $i
								GOEX=1
							;;
							R|r)
								removeold $i
								GOEX=1
							;;
							D|d)
								showdiff $1
							;;
							M|m)
								mergenew $1
							;;
							K|k|*)
								GOEX=1
							;;
						esac
					done
				done
				break
			;;
			*)
				echo "OK! Your choice is nothing! slackpkg will Keep the old files for you to deal with later"
			;;
		esac
	else
		echo -e "\t\tNo .new files found."
	fi
}

lookkernel() {
	NEWKERNELMD5=$(md5sum /boot/vmlinuz 2>/dev/null)
	if [ "$KERNELMD5" != "$NEWKERNELMD5" ]; then
		if [ -x /sbin/lilo ]; then
			echo -e "\n
Your kernel image was updated.  We highly recommend you run: lilo
Do you want slackpkg to run lilo now? (Y/n)"
			answer
			if [ "$ANSWER" != "n" ] && [ "$ANSWER" != "N" ]; then
				/sbin/lilo
			fi
		else
			echo -e "\n
Your kernel image was updated and lilo is not found on your system.
You may need to adjust your boot manager (like GRUB) to boot appropriate
kernel."
		fi
	fi
}
