openwrt-packages-dist/net/banip/files/banip.service

#!/bin/sh
# log service to trace suspicious logins and conditionally refresh banIP
# Copyright (c) 2019-2021 Dirk Brenken (dev@brenken.org)
# This is free software, licensed under the GNU General Public License v3.

# (s)hellcheck exceptions
# shellcheck disable=3040

export LC_ALL=C
export PATH="/usr/sbin:/usr/bin:/sbin:/bin"
set -o pipefail

ban_search="${1}"
ban_logger_cmd="$(command -v logger)"
ban_logread_cmd="$(command -v logread)"

if [ -x "${ban_logread_cmd}" ]; then
	"${ban_logger_cmd}" -p "info" -t "banIP-service [${$}]" "log/banIP service started" 2>/dev/null
	"${ban_logread_cmd}" -f |
		{
			grep -qE "${ban_search}" && {
				/etc/init.d/banip refresh
				exit 0
			}
		}
else
	"${ban_logger_cmd}" -p "err" -t "banIP-service [${$}]" "can't start log/banIP service" 2>/dev/null
fi