Detect Symbolic Links, Junction Points, Mount Points and Hard Links [duplicate]

Answer 1

Please see my question NTFS Junctions, trouble understanding the API. It is kind of a duplicate of the question. But I explain all about how reparse points, mountpoints, junctions, and symbolic links are implemented, using C/C++. Instead of just giving links to API, blindly...

Answer 2

Hard links:

You can detect if multiple names are pointing to the same "data chunk" or "file content" by invoking the Win32 API function GetFileInformationByHandle. The nNumberOfLinks member of the returned BY_HANDLE_FILE_INFORMATION structure contains the total number of links

Mount Points:

You can iterate through all the mount points on a volume using FindFirstVolumeMountPoint and FindNextVolumeMountPoint. Also FindVolumeMountPointClose should be used to close the search handle.

From .NET

Doing this from .NET will require some P/Invoke magic

Answer 3

Symbolic Links, Junction Points, and Mount Points are all examples of different reparse points. Hard Links, however, are just regular files. On NTFS all files are hard links. You can detect that a file has multiple hard links pointing to it, but there's no "real file" that it points to. You can think of hard links as just different names for the same file.

Here's some information on accessing reparse points from C#: http://www.codeproject.com/KB/vista/ReparsePointID.aspx?display=Print

Here's some information on how to do it in C: http://blog.kalmbach-software.de/2008/02/