Lonely World

起源

本项目原本的目的是用 GO 重构之前参与过的一个 OJ 的评测系统，目前完成了沙箱的部分分享一下。

需求

评测系统通常需要对提交的代码进行编译和运行。通常运行的算法代码并不需要特殊的权限和系统访问。沙箱需要限制住恶意代码对于评测系统运行的可能的破坏行为。

一个沙箱的实现包含了：

• 安全： 沙箱内的程序不允许进行超出计算需求的系统访问。包括网络访问，未授权的文件系统访问。
• 限制： 沙箱内的程序仅能使用限定的 CPU 时间和 内存
• 快速： 运行时的额外开销小

It have been a long time after last post and the sandbox technology have been improved a lot. By combining unix socket and container pooling from vijos/jd4 and cgroup checking and unshare container from syzoj/judge-v3, the judge is able to safely run arbitrary code in isolated environment.

Reimplement of UOJ run program in GO: go-judger. Start after I found libseccomp that uses seccomp filter introduced in linux 3.8 (2013). Since I have participated that project (uoj) only a little, I decided to try to do some contributions.

GitHub: DiscordBilibiliBot

After about one month of development, this discord bot finally have the expected behavior, but it still need some polishment.

Reason for developing such a bot

There are lots of discord bots that plays YouTube wideos as audio in discord audio channel, but there were not decent ones for Bilibili. Since I am a fan of Vocaloid China mainly posted on Bilibili, I started writing this bot.

Hello World

Adapted to using Hexo.