Question

我想通过SIGINT信号处理优雅地结束子进程。我有一个启动子进程的主要过程：

const childProcess = require('child_process');

console.log('started main');

const subprocess = childProcess.exec('node childProcess.js', (error, stdout) => {
    console.log('error:', error);
    console.log('log from child process: .............');
    console.log(stdout);
    console.log('log from child process - end: .............');
});

console.log('last line main');

subprocess.kill('SIGINT');

setTimeout(() => {
    console.log('ended main');
}, 3000);

子进程如下：

const fs = require('fs');
console.log('child started');

process.on('SIGINT', () => {
    console.log('child ending');
    fs.writeFileSync('test1.txt', 'abc');
    process.exit();
});

fs.writeFileSync('test0.txt', 'abc');

setTimeout(() => {
    console.log('timeout ended');
}, 2000);

当我从终端用node index.js启动主进程时，得到以下输出：

started main
last line main
error: { Error: Command failed: node childProcess.js

    at ChildProcess.exithandler (child_process.js:272:12)
    at ChildProcess.emit (events.js:127:13)
    at maybeClose (internal/child_process.js:933:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:220:5)
  killed: true,
  code: null,
  signal: 'SIGINT',
  cmd: 'node childProcess.js' }
log from child process: .............
child started
timeout ended

log from child process - end: .............
ended main

意味着子进程中的SIGINT处理程序未触发。此外，还会创建text0.txt作为副作用，但不会创建text1.txt。我也尝试了在子进程中没有setTimeout的情况，但是SIGINT不会触发。为什么SIGINT不触发？

环境：

ubuntu 16.04
节点v9.6.1

我设法通过在“系统监视器”进程列表中结束子进程来触发SIGTERM。

节点子进程未在subprocess.kill（'SIGINT'）上注册SIGINT

0 个答案: