how to know if a directory is referenced by a symlink

Question

Is there a command that I could execute to find out if a directory is referenced by a symlink somewhere on the machine.

ie:

pwd =>  /home/user/source/

vdir 
lrwxrwxrwx 1 user group   24 2011-04-08 10:59 Symlink -> /home/user/source/Test
drwxr-xr-x 2 user group 4096 2011-04-08 10:59 Test

Using this exemple, I want to know where to find Symlink because it reference Test.

I use Ubuntu 10.04.

Answer 1

Maybe you could try something like:

sudo find / -lname /path/to/your/file

But beware that some links can be defined with relative paths.

Or you can list all symbolic links and grep for your file using:

sudo find / -type l | grep /path/to/your/file

(the "l" in "-type l" is not the number one but L)

But each method has some drawbacks. Maybe someone knows better?

Answer 2

You have to scan the entire filesystem for softlinks, then resolve them and see if they point to the same location. Don't try to do a text-compare of the link destination, since that could go through another hard or softlink; you need to compare inodes probably.