python - Porting a C library to Python via ctypes

Question

I've read in a lot of places that C-libraries can be ported to or written in python using the ctypes module from the standard library.

I've gone through the help('ctypes') page and from what I could gather I can create some of the C structures in Python, but my question is how do I use these to access the underlying system calls? For eg. when trying to port something like 'sys/if.h' to Python?

Can someone point me to good resources/documentation regarding the same?

Answer 1

如果您想访问系统调用，您可以执行以下操作：

>>> from ctypes import CDLL
>>> libc = CDLL('libc.so.6')
>>> print libc.strlen('abcde')
5

参考：http ://blog.bstpierre.org/using-pythons-ctypes-to-make-system-calls

或者（这是棘手的部分）

将此处概述的系统调用包装到您的 C 代码中：

如何在 linux 中重新实现（或包装）系统调用函数？

并且，然后编写一个将由 CTypes 使用的兼容源代码文件，如下所示：

http://www.scipy.org/Cookbook/Ctypes

我希望这有帮助。