# signal-exit

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When you want to fire an event no matter how a process exits:

- reaching the end of execution.
- explicitly having `process.exit(code)` called.
- having `process.kill(pid, sig)` called.
- receiving a fatal signal from outside the process

Use `signal-exit`.

```js
var onExit = require("signal-exit");

onExit(function (code, signal) {
  console.log("process exited!");
});
```

## API

`var remove = onExit(function (code, signal) {}, options)`

The return value of the function is a function that will remove the
handler.

Note that the function _only_ fires for signals if the signal would
cause the proces to exit. That is, there are no other listeners, and
it is a fatal signal.

## Options

- `alwaysLast`: Run this handler after any other signal or exit
  handlers. This causes `process.emit` to be monkeypatched.
