objective c - Is there any function to retrieve the path associated with an inode?

Question

I am writing a utility that walks a directory tree on Mac OS X (10.6 and higher) and tries to detect changes that have occurred since the directory was last synchronized with a back-up location.

When I initially synchronize the files and folders I obtain the inode number and store it in the database record for that file or folder:

NSString *oldFilePath = /* ... */;
NSError *error = nil;
NSDictionary *attributes = [[NSFileManager defaultManager] attributesOfItemAtPath:oldFilePath error:&error];
/* set database record for oldFilePath to [attributes fileSystemFileNumber] */

When I encounter a new file or folder I first do a database lookup using the inode number to find the original file, if any.

But in the case where a file has moved from a parent directory to a sub-directory, and I am trying to detect changes to the parent directory I would like to be able to use the saved inode number to identify the new path so that I can distinguish between a move and a delete.

Answer 1

On Mac the GetFileInfo command performs a reverse lookup of inode numbers.

GetFileInfo /.vol/234881029/344711

Should produce:

file: "/path/to/file"
...

Martin R's answer only works on directories.