226 lines
6.7 KiB
Bash
226 lines
6.7 KiB
Bash
#!/usr/bin/env bash
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#!/bin/bash
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# Beschreibung: Minecraft → ntfy Notifier (Join/Leave + optional Up/Down) mit Cron-safe Locking
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# Autor: Patrick Asmus
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# Web: https://www.cleveradmin.de
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# Repository: https://git.techniverse.net/scriptos/minecraft-ntfy-notify
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# Version: 1.8
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# Datum: 19.09.2025
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# Änderungen:
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# - SERVER_NAME im Titel
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# - GAME_HOST/GAME_PORT im Body
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# - MESSAGE_EXTRA als zusätzliche Body-Zeile (optional)
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# - Body-Layout mehrzeilig: Event, Server, Port, [Extra]
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#####################################################
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set -euo pipefail
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export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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# .env laden: bevorzugt ENV_FILE, sonst ./.env
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if [[ -n "${ENV_FILE:-}" && -f "${ENV_FILE}" ]]; then
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set -a; . "${ENV_FILE}"; set +a
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elif [[ -f "${SCRIPT_DIR}/.env" ]]; then
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set -a; . "${SCRIPT_DIR}/.env"; set +a
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fi
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# ===== Konfiguration via ENV =====
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# RCON (für Polling)
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MC_HOST="${MC_HOST:-127.0.0.1}"
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RCON_PORT="${RCON_PORT:-25575}"
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RCON_PASSWORD="${RCON_PASSWORD:-changeme}"
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# Spiel-Adresse (DNS:Port zum Joinen, nur Anzeige)
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GAME_HOST="${GAME_HOST:-${MC_HOST}}"
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GAME_PORT="${GAME_PORT:-25565}"
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POLL_SECONDS="${POLL_SECONDS:-10}"
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ANNOUNCE_SERVER_UPDOWN="${ANNOUNCE_SERVER_UPDOWN:-true}"
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# ntfy
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NTFY_SERVER="${NTFY_SERVER:-}"
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NTFY_TOPIC="${NTFY_TOPIC:-}"
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NTFY_TOKEN="${NTFY_TOKEN:-}"
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NTFY_TITLE_PREFIX="${NTFY_TITLE_PREFIX:-Minecraft}"
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NTFY_PRIORITY_JOIN="${NTFY_PRIORITY_JOIN:-3}"
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NTFY_PRIORITY_LEAVE="${NTFY_PRIORITY_LEAVE:-3}"
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NTFY_PRIORITY_UP="${NTFY_PRIORITY_UP:-4}"
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NTFY_PRIORITY_DOWN="${NTFY_PRIORITY_DOWN:-5}"
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NTFY_MARKDOWN="${NTFY_MARKDOWN:-false}"
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# Anzeigename für den Titel
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SERVER_NAME="${SERVER_NAME:-}"
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# Optionale Zusatzzeile im Body
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MESSAGE_EXTRA="${MESSAGE_EXTRA:-}"
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# Lock & State je Instanz (Host:Port:Topic)
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LOCK_KEY="$(printf '%s' "${MC_HOST}_${RCON_PORT}_${NTFY_TOPIC}" | tr -c 'A-Za-z0-9._-' '_')"
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STATE_DIR="${STATE_DIR:-${SCRIPT_DIR}/state.${LOCK_KEY}}"
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STATE_PLAYERS="${STATE_DIR}/players.prev"
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STATE_UP="${STATE_DIR}/server_up.prev"
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RUN_DIR="${RUN_DIR:-${STATE_DIR}}"
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LOCK_DIR="${RUN_DIR}/lock.${LOCK_KEY}"
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PID_FILE="${LOCK_DIR}/pid"
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RUN_MARK="${RUN_DIR}/running.${LOCK_KEY}"
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DEBUG="${DEBUG:-false}"
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# ===== Helpers =====
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die() { echo "ERROR: $*" >&2; exit 1; }
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need_bin() { command -v "$1" >/dev/null 2>&1 || die "Benötigtes Tool fehlt: $1"; }
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dbg() { [[ "$DEBUG" == "true" ]] && echo "DBG: $*" >&2 || true; }
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cleanup() {
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rm -f "$RUN_MARK" "$PID_FILE" 2>/dev/null || true
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rmdir "$LOCK_DIR" 2>/dev/null || true
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}
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acquire_lock() {
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mkdir -p "$RUN_DIR"
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if mkdir "$LOCK_DIR" 2>/dev/null; then
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echo "$$" > "$PID_FILE"
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trap cleanup EXIT INT TERM
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else
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if [[ -f "$PID_FILE" ]]; then
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oldpid="$(cat "$PID_FILE" 2>/dev/null || true)"
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if [[ -n "${oldpid:-}" ]] && kill -0 "$oldpid" 2>/dev/null; then
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exit 0
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fi
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fi
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rm -rf "$LOCK_DIR" 2>/dev/null || true
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mkdir "$LOCK_DIR" 2>/dev/null || die "Konnte Lock nicht übernehmen: ${LOCK_DIR}"
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echo "$$" > "$PID_FILE"
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trap cleanup EXIT INT TERM
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fi
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}
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build_title() {
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if [[ -n "$SERVER_NAME" ]]; then
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printf '%s - %s' "$NTFY_TITLE_PREFIX" "$SERVER_NAME"
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else
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printf '%s' "$NTFY_TITLE_PREFIX"
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fi
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}
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# Baut den Body in gewünschtem Layout:
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# <eventline>\nServer: <GAME_HOST>\nPort: <GAME_PORT>\n[<MESSAGE_EXTRA>]
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build_body() {
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local event="$1"
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if [[ -n "$MESSAGE_EXTRA" ]]; then
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printf '%s\n\nServer: %s\nPort: %s\n%s' \
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"$event" "$GAME_HOST" "$GAME_PORT" "$MESSAGE_EXTRA"
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else
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printf '%s\nServer: %s\nPort: %s' \
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"$event" "$GAME_HOST" "$GAME_PORT"
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fi
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}
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ntfy_notify() {
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# ntfy_notify "Body" PRIORITY
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local body="$1" priority="$2"
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[[ -z "$NTFY_SERVER" || -z "$NTFY_TOPIC" ]] && { echo "ntfy Server/Topic fehlt – skip"; return 1; }
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local url="${NTFY_SERVER%/}/${NTFY_TOPIC}"
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local title; title="$(build_title)"
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local args=(-sS -X POST "$url" -H "Title: ${title}" -H "Priority: ${priority}")
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[[ "$NTFY_MARKDOWN" == "true" ]] && args+=(-H "Markdown: yes")
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[[ -n "$NTFY_TOKEN" ]] && args+=(-H "Authorization: Bearer ${NTFY_TOKEN}")
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curl "${args[@]}" --data-raw "$body" >/dev/null 2>&1 || return 1
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return 0
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}
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ensure_state() {
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mkdir -p "$STATE_DIR"
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touch "$STATE_PLAYERS"
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[[ -f "$STATE_UP" ]] || echo "unknown" >"$STATE_UP"
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}
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# ANSI- & MC-Farbcodes entfernen
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sanitize() {
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sed -E $'s/\x1B\\[[0-9;]*[A-Za-z]//g' \
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| sed -E 's/§[0-9A-FK-ORa-fk-or]//g' \
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| tr -d '\r' \
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| sed -E 's/[\x00-\x1F\x7F]//g'
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}
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get_players() {
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local out
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if ! out=$(mcrcon -H "$MC_HOST" -P "$RCON_PORT" -p "$RCON_PASSWORD" "list" 2>/dev/null); then
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return 1
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fi
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dbg "RAW: $out"
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out="$(printf '%s' "$out" | sanitize)"
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if ! grep -q "players online:" <<<"$out"; then
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return 0
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fi
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local names="${out#*:}"
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names="$(echo "$names" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')"
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if [[ -z "$names" ]]; then
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return 0
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fi
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printf '%s\n' "$names" \
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| tr ',' '\n' \
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| sed 's/^[[:space:]]*//;s/[[:space:]]*$//' \
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| sed '/^$/d' \
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| LC_ALL=C sort -u
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return 0
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}
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# ===== Checks & Lock =====
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need_bin curl
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need_bin mcrcon
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[[ -n "${NTFY_SERVER}" && -n "${NTFY_TOPIC}" ]] || die "NTFY_SERVER/NTFY_TOPIC nicht gesetzt"
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ensure_state
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acquire_lock
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echo "Starte Polling RCON ${MC_HOST}:${RCON_PORT} -> ntfy ${NTFY_SERVER}/${NTFY_TOPIC} (PID $$)"
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prev_up="$(cat "$STATE_UP")"
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# ===== Main Loop =====
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while :; do
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date -Iseconds > "$RUN_MARK"; echo "$$" >> "$RUN_MARK"
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tmp_players="$(mktemp)"
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if get_players >"$tmp_players"; then
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server_up="true"
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else
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server_up="false"
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: >"$tmp_players"
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fi
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if [[ "$ANNOUNCE_SERVER_UPDOWN" == "true" && "$prev_up" != "unknown" && "$server_up" != "$prev_up" ]]; then
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if [[ "$server_up" == "true" ]]; then
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ntfy_notify "$(build_body "Server ist wieder erreichbar.")" "$NTFY_PRIORITY_UP" || true
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else
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ntfy_notify "$(build_body "Server ist nicht erreichbar.")" "$NTFY_PRIORITY_DOWN" || true
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fi
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fi
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if [[ "$server_up" == "true" ]]; then
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LC_ALL=C sort -u "$STATE_PLAYERS" -o "$STATE_PLAYERS"
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joined="$(comm -13 "$STATE_PLAYERS" "$tmp_players" || true)"
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left="$(comm -23 "$STATE_PLAYERS" "$tmp_players" || true)"
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if [[ -n "$joined" ]]; then
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while IFS= read -r name; do
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[[ -z "$name" ]] && continue
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ntfy_notify "$(build_body "Player \"${name}\" hat den Server betreten.")" "$NTFY_PRIORITY_JOIN" || true
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done <<<"$joined"
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fi
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if [[ -n "$left" ]]; then
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while IFS= read -r name; do
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[[ -z "$name" ]] && continue
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ntfy_notify "$(build_body "Player \"${name}\" hat den Server verlassen.")" "$NTFY_PRIORITY_LEAVE" || true
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done <<<"$left"
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fi
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mv "$tmp_players" "$STATE_PLAYERS"
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else
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rm -f "$tmp_players"
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fi
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echo -n "$server_up" >"$STATE_UP"
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prev_up="$server_up"
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sleep "$POLL_SECONDS"
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done
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