pi-hole/advanced/Scripts/piholeInclude

#!/usr/bin/env bash
# Pi-hole: A black hole for Internet advertisements
# (c) 2015, 2016 by Jacob Salmela
# Network-wide ad blocking via your Raspberry Pi
# http://pi-hole.net
# Include for other pihole scripts.
#
# Pi-hole is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.

# Older versions of Pi-hole set $SUDO="sudo" and prefixed commands with it,
# rather than rerunning with sudo. Just in case it turns up by accident, 
# explicitly set the $SUDO variable to an empty string.
SUDO=""

function rerun_root() {
	# Check if root, and if not then rerun with sudo.
	# The parent script should pass its $0 and $@ to this function.
	echo ":::"
	if [[ $EUID -eq 0 ]];then
		echo "::: You are root."
	else
		echo "::: sudo will be used."
		# Check if it is actually installed
		# If it isn't, exit because the install cannot complete
		if [[ $(dpkg-query -s sudo) ]];then
			echo "::: Running sudo $@"
			sudo "$@"
			exit $?
		else
			echo "::: Please install sudo."
		exit 1
		fi
	fi
}

function rerun_pihole() {
	# Check if pihole user, and if not then rerun with sudo.
	# The parent script should pass its $0 and $@ to this function.
	echo ":::"
	runninguser=$(whoami)
	if [[ "$runninguser" = "pihole"  ]];then
		echo "::: You are pihole user."
	else
		echo "::: sudo will be used."
		# Check if it is actually installed
		# If it isn't, exit because the install cannot complete
		if [[ $(dpkg-query -s sudo) ]];then
			echo "::: Running sudo -u pihole $@"
			sudo -u pihole "$@"
			exit $?
		else
			echo "::: Please install sudo."
		exit 1
		fi
	fi
}