node.js - NodeJS - 用户登录前无法访问文件系统

Question

我有一个节点服务器应用程序，它在 CentOS 上使用 pm2 作为服务运行。它必须列出所有带有 nodejs fs模块的外部驱动器。当root用户登录时，它可以完美运行。重新启动操作系统后，pm2 再次运行服务器，但无法访问查看目录。

这是我列出所有目录的代码：

const driveList = require('drivelist');
const fs = require('fs');
const path = require('path');
const emptyDir = require('empty-dir');

const config = require('../config.json');


exports.list_all_drives = function(req, res) {
    return driveList.list((err, drives) => {

        if(err) return res.status(500).send('there was an error');

        let isWin = /^win/.test(process.platform);

        let usbDrives = [];
        drives.map((drive) => {
            if(isWin){
                for(let index in drive.mountpoints){
                    usbDrives.push(drive.mountpoints[index].path);
                }
            }else{
                if(!drive.system){
                    for(let index in drive.mountpoints){
                        usbDrives.push(drive.mountpoints[index].path);
                    }
                }
            }
        });

        if(err) return res.status(500).send('there was an error');
        let records = [];
        usbDrives.forEach((name, i) => {
            let record = {};
            record.id = i;
            record.title = name;
            record.path = name;
            record.isDirectory = true;

            let skip = false;
            config.skipPath.forEach((val) => {
                if(record.path == val){
                    skip = true;
                }
            });

            if(!skip){
                records.push(record);
            }
        });
        res.status(200).send(records);
    });
};

当用户登录时，函数工作并列出所有操作系统目录，但当系统重新启动时，它返回 500 错误：

{"errno":-2,"code":"ENOENT","syscall":"open","path":"/run/user/0/drivelist-ecc75a4a9523.sh"}