事件：'close'

【Event: 'close'】

• code <number> 如果子进程自行退出，则为退出代码；如果子进程因信号终止，则为 null。
• signal <string> 导致子进程终止的信号；如果子进程不是由于信号而终止，则为 null。

'close' 事件在进程结束并且子进程的 stdio 流已经关闭后触发。这与 'exit' 事件不同，因为多个进程可能共享相同的 stdio 流。'close' 事件总是在 'exit' 已经触发之后，或者在子进程未能启动时触发 'error' 之后发出。

【The 'close' event is emitted after a process has ended and the stdio streams of a child process have been closed. This is distinct from the 'exit' event, since multiple processes might share the same stdio streams. The 'close' event will always emit after 'exit' was already emitted, or 'error' if the child process failed to spawn.】

如果进程退出，code 是进程的最终退出代码，否则为 null。如果进程由于收到信号而终止，signal 是信号的字符串名称，否则为 null。两者中总有一个不为 null。

【If the process exited, code is the final exit code of the process, otherwise null. If the process terminated due to receipt of a signal, signal is the string name of the signal, otherwise null. One of the two will always be non-null.】

const { spawn } = require('node:child_process');
const ls = spawn('ls', ['-lh', '/usr']);

ls.stdout.on('data', (data) => {
  console.log(`stdout: ${data}`);
});

ls.on('close', (code) => {
  console.log(`child process close all stdio with code ${code}`);
});

ls.on('exit', (code) => {
  console.log(`child process exited with code ${code}`);
});import { spawn } from 'node:child_process';
import { once } from 'node:events';
const ls = spawn('ls', ['-lh', '/usr']);

ls.stdout.on('data', (data) => {
  console.log(`stdout: ${data}`);
});

ls.on('close', (code) => {
  console.log(`child process close all stdio with code ${code}`);
});

ls.on('exit', (code) => {
  console.log(`child process exited with code ${code}`);
});

const [code] = await once(ls, 'close');
console.log(`child process close all stdio with code ${code}`);拷贝