Small domain blocker written in bash. Blocks domains in the /etc/hosts file.

domain-blocker

#!/usr/bin/bash

# Domain blocker by knuxify
# This tool is based off the domain-blocker module, but adds a switch handler and additional output.

## User modifiable values:
unset domains
domains="youtube.com twitter.com discordapp.com nulled.red" # domains to block, separated by spaces

start() {
	[[ ! -w /etc/hosts ]] && echo -e "\e[31m/etc/hosts is not writeable! Please retry as sudo or chown the hosts file so that you can write to it.\e[0m" && exit 1
	sed -i -n '/#START\-DOMAIN\-BLOCK/,/#END\-DOMAIN\-BLOCK/!p' /etc/hosts

	echo "#START-DOMAIN-BLOCK" >> /etc/hosts
	for domain in $domains; do
		echo -e "\e[32mBlocking $domain...\e[0m"
		echo "127.0.0.1 $domain www.$domain" >> /etc/hosts
	done
	echo "#END-DOMAIN-BLOCK" >> /etc/hosts
	echo -e "\e[32mBlocking successful!\e[0m"
}

end() {
	[[ ! -w /etc/hosts ]] && echo -e "\e[31m/etc/hosts is not writeable! Please retry as sudo or chown the hosts file so that you can write to it.\e[0m" && exit 1
	sed -i -n '/#START\-DOMAIN\-BLOCK/,/#END\-DOMAIN\-BLOCK/!p' /etc/hosts
	echo -e "\e[32mUnblocking successful!\e[0m"
}

[[ -z "$*" ]] && echo -e "\e[31mNo action specified!\e[0m Available commands: start, end" && exit 1
case $* in
	start) start;;
	end) end;;
	*) echo -e "\e[31mInvalid action specified!\e[0m Available commands: start, end"; exit 1;;
esac