improve updatenginxblocker.sh

adds compatibility for reloading Nginx on:

* Arch Linux (does not have a 'service' command)
* OpenRC (older versions do not have /sbin/service)

tested on Debian / Arch / Centos / Alpine Linux

updatenginxblocker.sh

@@ -1,26 +1,55 @@
-#!/bin/bash
-# Bash Script for Auto Updating the Nginx Bad Bot Blocker
+#!/bin/sh
+
+# Shell Script for Auto Updating the Nginx Bad Bot Blocker
 # Copyright - https://github.com/mitchellkrogza
 # Project Url: https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker
+# Alpine / Arch Linux / Debian / Centos script compatibility by Stuart Cardall
 
 # MAKE SURE you have your whitelist-ips.conf and whitelist-domains.conf files in /etc/nginx/bots.d
 # A major change to using include files was introduced in
 # https://github.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/commit/c7acdfa8228d2f19a83e5bb14d54355db86fcebf
 
 # PLEASE READ UPDATED CONFIGURATION INSTRUCTIONS BEFORE USING THIS
 
-# Save this file as /bin/updatenginxblocker.sh
-# Make it Executable chmod +x /bin/updatenginxblocker.sh
+# Save this file as /usr/sbin/updatenginxblocker
+# Make it Executable chmod 700 /usr/sbin/updatenginxblocker
 
 # RUN THE UPDATE
 # Here our script runs, pulls the latest update, reloads nginx and emails you a notification
-# Place your own valid email address where it says "[email protected]"
-
-cd /etc/nginx/conf.d
-sudo wget https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/conf.d/globalblacklist.conf -O globalblacklist.conf
-sudo service nginx reload | mail -s "Nginx Bad Bot Blocker Updated" [email protected]
-exit 0
+
+email="[email protected]"
+conf_dir=/etc/nginx/conf.d
+url=https://raw.githubusercontent.com/mitchellkrogza/nginx-ultimate-bad-bot-blocker/master/conf.d/globalblacklist.conf
+
+service_cmd() {
+	# arch linux does not have a 'service' command
+	local svc= svc_list="service systemctl rc-service"
+
+	for svc in $svc_list; do
+		svc=$(which $svc 2>/dev/null)
+		if [ -n "$svc" ]; then
+			echo $svc
+			exit 0
+		fi
+	done
+}
+
+# require root
+if [ "$(id -u)" != "0" ]; then
+	echo "This script must be run as root" 1>&2
+	exit 1
+fi
+
+# default to service (centos does not have 'which' by default)
+service=${service_cmd:-"service"}
+
+# download update & email notification
+mkdir -p $conf_dir
+wget $url -O $conf_dir/globalblacklist.conf
+$service nginx reload | mail -s "Nginx Bad Bot Blocker Updated" $email
+
+exit $?
 
 # Add this as a cron to run daily / weekly as you like
 # Here's a sample CRON entry to update every day at 10pm
-# 00 22 * * * /bin/updatenginxblocker.sh
+# 00 22 * * * /usr/sbin/updatenginxblocker