Pi-hole Blocklist Management Script

remote_pihole_blocklist_management.sh

#!/bin/bash

DEFAULT_PIHOLE_IP="localhost"

show_help() {
    echo "Usage: $0 [-i ip_address] [-t token] [-a domain|-r domain|-l]"
    echo "  -i: IP address of Pi-hole server (default: localhost)"
    echo "  -t: API token (required)"
    echo "  -a: Add domain to blocklist"
    echo "  -r: Remove domain from blocklist"
    echo "  -l: List current blocklist"
    echo "  -h: Show this help message"
    exit 1
}

while getopts "i:t:a:r:lh" opt; do
    case $opt in
        i) PIHOLE_IP="$OPTARG";;
        t) API_TOKEN="$OPTARG";;
        a) ACTION="add" && DOMAIN="$OPTARG";;
        r) ACTION="remove" && DOMAIN="$OPTARG";;
        l) ACTION="list";;
        h) show_help;;
        ?) show_help;;
    esac
done

if [ -z "$API_TOKEN" ]; then
    echo "Error: API token is required"
    show_help
fi

PIHOLE_IP=${PIHOLE_IP:-$DEFAULT_PIHOLE_IP}

case $ACTION in
    "add")
        response=$(curl -s "http://${PIHOLE_IP}/admin/api.php?list=black&add=${DOMAIN}&auth=${API_TOKEN}")
        echo "Adding ${DOMAIN} to blocklist: $response"
        ;;
    "remove")
        response=$(curl -s "http://${PIHOLE_IP}/admin/api.php?list=black&sub=${DOMAIN}&auth=${API_TOKEN}")
        echo "Removing ${DOMAIN} from blocklist: $response"
        ;;
    "list")
        response=$(curl -s "http://${PIHOLE_IP}/admin/api.php?list=black&auth=${API_TOKEN}")
        echo "Current Blocklist:"
        echo "$response" | jq -r '.[]'
        ;;
    *)
        echo "Error: No action specified"
        show_help
        ;;
esac