property ChildProcess.prototype.pid
Usage in Deno
```typescript import { ChildProcess } from "node:node__child_process.d.ts"; ```Returns the process identifier (PID) of the child process. If the child process
fails to spawn due to errors, then the value is `undefined` and `error` is
emitted.
```js
import { spawn } from 'node:child_process';
const grep = spawn('grep', ['ssh']);
console.log(`Spawned child pid: ${grep.pid}`);
grep.stdin.end();
```
number | undefined