文件系统是否具有其他组件，而不是文件和目录? [英] Do file systems have other components rather than files and directories?

问题描述

我在视频教程中看到了这个python代码段，该代码段检查列出的项目是目录还是文件:

I have seen this python snippet in a video tutorial which checks if the listed item is a directory or a file:

for item in os.listdir("."):
    if os.path.isfile(item):
        # do something
    elif os.path.isdir(item):
        # do somethin
    else:
        # What is this case ?!

else语句是否有可能被击中?

is it possible that the else statement could be hit?

推荐答案

正如@sisoft所说，简单的答案是肯定的:确实存在支持文件和目录以外的文件类型的文件系统.

As @sisoft says, the simple answer is yes: there do exist file systems that support file types other than files and directories.

如果您感兴趣的话，更长的答案是文件系统支持的类型随文件系统的不同而有很大差异. UNIX将大量事物视为文件"(意味着文件系统中的对象)，因此具有许多类型. Windows具有一组更受限制的对象(我相信文件，目录和链接(无源))

The longer answer, if you're interested, is that the types supported by a file system vary wildly with the file system. UNIX treats a huge number of things as a 'file' (meaning an object in the file system) and so has many types. Windows has a more restricted set of objects (files, directories and links only I believe (no source))

文件系统的POSIX规范(由许多文件系统实现)未指定文件系统必须支持的对象(

The POSIX specification (implemented by many file systems) for a file system doesn't specify what objects it must support(source).

通常，文件系统是一个相当开放的术语，可以引用任何对象存储.它存储的对象可以是任何东西.

Generally, file system is a fairly open term that can refer to any object store. The objects that it stores could be anything.

如果您想了解有关文件系统的更多信息，请参阅操作系统，它提供了易于访问的介绍.

If you'd like to learn more about file systems, there is a great chapter in Operating Systems which gives an easily accessible introduction.

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