#!/bin/bash

LOCK_DIR="/run/lock" # Standard für systemweite Locks
if [[ ! -w "$LOCK_DIR" ]]; then
    LOCK_DIR="/tmp" # Fallback für benutzerspezifische Locks
fi

# Funktion zur Erstellung des Lock-Dateinamens
get_lock_file() {
    local suffix="$1"
    if [[ -n "$suffix" ]]; then
        echo "$LOCK_DIR/$(basename "$0")_$suffix.lock"
    else
        echo "$LOCK_DIR/$(basename "$0").lock"
    fi
}

create_lock() {
    local suffix="$1"
    local lock_file
    lock_file=$(get_lock_file "$suffix")

    if [[ -e "$lock_file" ]]; then
        log "Ein anderer Prozess läuft bereits. Lock-File gefunden: $lock_file"
        exit 1
    fi
    touch "$lock_file"
    log "Lock-File erstellt: $lock_file"
}

remove_lock() {
    local suffix="$1"
    local lock_file
    lock_file=$(get_lock_file "$suffix")

    if [[ -e "$lock_file" ]]; then
        rm -f "$lock_file"
        log "Lock-File entfernt: $lock_file"
    fi
}

trap_remove_lock() {
    log "Signal empfangen. Lock-File wird entfernt."
    remove_lock
    exit 1
}