child_process.exec

child_process.exec 启动的时候是有顺序的，但是执行的时候并没有顺序，这里的多进程已经是并发执行了

const fs = require('fs');
const child_process = require('child_process');
 

for(var i=0; i<10; i++) {
    console.log("开始执行第"+i+"个进程")
    var workerProcess = child_process.exec('node support.js -n ' + i, function (error, stdout, stderr) {
        if (error) {
            console.log(error.stack);
            console.log('Error code: '+error.code);
            console.log('Signal received: '+error.signal);
        }
        console.log('stdout: ' + stdout);
        console.log('stderr: ' + stderr);
    });
    
    workerProcess.on('exit', function (code) {
        console.log('子进程已退出，退出码 '+code);
    });
}

const yargs = require('yargs');
const argv    = yargs.alias('n', 'num').argv

setTimeout(()=>{
    console.log("pid是"+process.pid + "num是" + argv.num);
},1000* Math.ceil(Math.random()*10));