问题描述
我正在尝试编写一个简单的判断器，该编译器将编译并执行用户提交的c文件.我发现 libsandbox 和一个问题 在 stackoverflow 上.
I'm trying to write a simple judge that will compile and execute user submitted c files. I found libsandbox and a question here on stackoverflow.
我已经安装了python模块，并按照说明尝试运行用C编写的hello world程序.
I have installed the python module and as per the instructions I'm trying to run a hello world program written in C
➜ sandbox git:(V_0_3_x) ✗ ./hello
Hello World%
➜ sandbox git:(V_0_3_x) ✗ python sample2.py hello
result: RF
cpu: 2ms
mem: 288kB
如您所见，当我在沙箱中运行程序时，没有任何输出.如果有人能告诉我如何正确使用它，那就太好了.
As you can see, when I run the program in the sandbox I don't get any output. It'd be great if someone could tell me how to correctly use it.
推荐答案
libsandbox 的示例代码禁止系统调用文件操作，例如 open()， stat()， close().也就是说，您需要(1)链接 hello world程序静态，以避免打开诸如共享库之类的文件(即 libc.so )，或 (2) 编写允许相关系统调用的自定义沙箱策略.有关自定义沙箱策略的一些示例可以在 https://github.com/liuyu81/TR-OJA中找到-201209A.
The sample code of libsandbox forbids system calls for file operations, such as open(), stat(), close(). That said, you'll need to either (1) link the hello world program statically to avoid opening files such as shared libraries (i.e. libc.so), or (2) write a customized sandbox policy that permits relevant system calls. Some examples on customizing sandbox policies can be found at https://github.com/liuyu81/TR-OJA-201209A.
免责声明:我是 libsandbox 的作者.
DISCLAIMER: I am the author of libsandbox.
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