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spawn_app.js
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40 lines (32 loc) · 994 Bytes
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const spawn = require('child_process').spawn;
function start(){
let child = spawn('node', ['./spawn_child.js'], {
cwd: __dirname,
detached: true,
stdio: 'inherit'
})
console.log(process.pid, child.pid);
process.exit(0);
/**
* @param { Number } code 子进程退出码
* @param { String } signal 子进程被终止时的信号
*/
child.on('close', (code, signal) => {
console.log(`收到close事件，子进程收到信号 ${signal} 而终止，退出码 ${code}`);
child.kill();
child = start();
});
/**
* 出现以下情况触发error事件
* 1. 进程无法被衍生
* 2. 进程无法被杀死
* 3. 向子进程发送信息失败
*/
child.on('error', (code, signal) => {
console.log(`收到error事件，子进程收到信号 ${signal} 而终止，退出码 ${code}`);
child.kill();
child = start();
});
return child;
}
start();