denoland-deno/docs/examples/os_signals.md

Handle OS Signals

This program makes use of an unstable Deno feature. Learn more about unstable features.

API Reference

You can use Deno.signal() function for handling OS signals.

for await (const _ of Deno.signal(Deno.Signal.SIGINT)) {
  console.log("interrupted!");
}

Deno.signal() also works as a promise.

await Deno.signal(Deno.Signal.SIGINT);
console.log("interrupted!");

If you want to stop watching the signal, you can use dispose() method of the signal object.

const sig = Deno.signal(Deno.Signal.SIGINT);
setTimeout(() => {
  sig.dispose();
}, 5000);

for await (const _ of sig) {
  console.log("interrupted");
}

The above for-await loop exits after 5 seconds when sig.dispose() is called.