https://nalar.dev/tags/signals/ Recent content in Signals on Nalar Hugo en-us Fri, 04 Sep 2026 00:00:00 +0700 https://nalar.dev/handle-linux-signals-in-event-loops-with-signalfd/ Fri, 04 Sep 2026 00:00:00 +0700 https://nalar.dev/handle-linux-signals-in-event-loops-with-signalfd/ <p>Unix signals are asynchronous by design: a signal can interrupt a program between ordinary instructions and transfer control to a signal handler. That model is useful, but it creates an awkward boundary for event-driven programs.</p> <p>A network server may already spend most of its time inside <code>poll()</code>, <code>epoll_wait()</code>, or another readiness API. Its sockets, pipes, and timers appear as file-descriptor events, while <code>SIGTERM</code> and <code>SIGHUP</code> arrive through a separate execution path with much stricter rules about what code may safely run.</p>