问题描述
由于文件路径，我怎样才能得到它的元数据。这是我的问题：我有真正隐藏文件（甚至与LS -a它不应该出现在任何地方），我DONOT需要gaurentee，这将具有相同的状态，当它回来。现在我虽然如果能只复制元数据，并存储在某个地方，只写回，当我需要，这将解决我的问题。
Given a file path, how can I get its meta data. Here is my problem: I have to truly hide a file (even with ls -a it should not show up anywhere) and I donot need to gaurentee that it will have the same state when it comes back. Now I though if can just copy the meta data and store it somewhere, only to write it back when I need to, It would solve my problem
- 我要创建元数据的副本，并将其存储在另一个地方。
- 我必须能够复制回它当过我想要的元数据。
所以，我怎样才能得到一个文件的元数据？如果有更好的方式来充分隐藏文件怎么可以？
So How can I get the meta-data of a file? If there is a better way to fully hide the file how can I?
这是一个个人项目，我不会有任何code上游。
This is a personal project and I wont have any code up-stream.
我在linux内核3.5.4v工作
I am working in linux kernel 3.5.4v
推荐答案
我想过这个问题更多一些。
I thought about the question some more.
有具体的文件系统的方法来创建真正隐藏的文件，当然，可能性，但我不是在探索那些感兴趣。然而，有一种不同的方法，一个变体，这可能满足您的需求。
There are filesystem-specific ways to create the possibility of truly hidden files, of course, but I'm not at all interested in exploring those. However, there is a different approach, a variant, that might suit your needs.
您可以通过截获仅打开系统调用达到类似的效果（扩大现有的，以precise）。如果打开的文件解析到一个不存在的文件，但目录和文件名匹配，而不是失败构造一个特殊的路径隐藏文件，并打开该网址。
You could achieve a similar effect by intercepting only the open syscall (extending the existing one, to be precise). If the opened file resolves to a nonexisting file, but the directory and the file name match, instead of failing you construct a special path to the "hidden" file, and open that instead.
现有的文件随后将是一个完全正常的文件，只是实际别处。当然，你可以把它放在一个根只访问的目录（ drwx ------根：根），并打开时，它省略了访问安全检查，让它隐藏。
The existing file would then be a perfectly normal file, just actually somewhere else. Of course, you can put it in a root-only accessible directory (drwx------ root:root), and omit the access security check when opening it, to make it "hidden".
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