Listen to OS signals

Bun supports the Node.js process global, including the process.on() method for listening to OS signals.

process.on("SIGINT", () => {
  console.log("Received SIGINT");
});

To run code when the process exits, listen for these events:

• "beforeExit": Bun emits this event when the event loop empties.
• "exit": Bun emits this event when the event loop empties or when process.exit() is called.

Neither event is emitted when the process is killed by a signal it has no listener for. To run cleanup on a signal, listen for that signal and call process.exit() from the listener.

process.on("beforeExit", code => {
  console.log(`Event loop is empty!`);
});

process.on("exit", code => {
  console.log(`Process is exiting with code ${code}`);
});

See Utils for more utilities.