#!/bin/sh

if [ $# -lt 1 ]; then
	echo "Missing parameter" 1>&2
	exit 2
fi

SRC_CONFIG_PATH="/opt/eset/efs/lib/install_scripts/eset_efs_sysctl.conf"
CONFIG_FILE="eset_efs_sysctl.conf"
PRIORITY="30"
SYSCTL_CONFD_DIR="/etc/sysctl.d"
SYSCTL_ARCHIVE_PATH="/var/opt/eset/efs/installer/sysctl.conf"

DEST_CONFIG="$SYSCTL_CONFD_DIR/$PRIORITY-$CONFIG_FILE"

add_conf_file() {
	if [ ! -r "$SRC_CONFIG_PATH" ] ; then
		echo "Error reading source config file \"$SRC_CONFIG_PATH\"" 1>&2
		exit 1
	fi

	echo "Copying $CONFIG_FILE to $DEST_CONFIG"
	if ! cp "$SRC_CONFIG_PATH" "$DEST_CONFIG" ; then
		echo "Error copying config file" 1>&2
		exit 1
	fi

	echo "Archiving previous sysctl state"

	sysctl -e net.ipv4.conf.default.route_localnet net.ipv4.ip_forward net.ipv6.conf.all.forwarding > $SYSCTL_ARCHIVE_PATH

	echo "Reloading sysctl configuration"
	sysctl --quiet --system > /dev/null 2>&1
}

remove_conf_file() {
	echo "Removing $DEST_CONFIG"
	if ! rm -f "$DEST_CONFIG" ; then
		echo "Error removing config file \"$DEST_CONFIG\"" 1>&2
		exit 1
	fi

	echo "Restoring archived sysctl state"

	sysctl --quiet -e --load=$SYSCTL_ARCHIVE_PATH

	echo "Reloading sysctl configuration"
	sysctl --quiet --system > /dev/null 2>&1
}

if [ "$1" = "enable" ]; then
	add_conf_file
elif [ "$1" = "disable" ]; then
	remove_conf_file
else
	echo "Invalid option: \"$1\"" 1>&2
	exit 2
fi