如何检查C ++代码中的文件写入权限？

Question

In my C++ program, I want to make sure i can write info to a file. How can I perform this check?

Answer 1

The only sure way to find if you can write to a file is to try to write to a file. It is possible, and even likely in some circumstances, that a file will have its permissions changed between calls to function such as stat and the actual write. Your code must deal with write failures anyway, so it makes sense to centralise the testing code there.

Answer 2

您使用stat（）系统调用，纯粹主义者会告诉您该调用不存在，除非您更改问题的标签。