search for: rsyncuidmap

I was wondering if it would be possible to keep a user/uid <-> file map so that root access wouldn't be necessary to store the files and retrieve them with the correct original usernames (or uids), specifying a filename on the command line as something like .rsyncuidmap. Or even a file system stored in a file that could be "mounted" by rsync and written any uid/gid etc that is needed without requiring root access, as it would just be writing to a file owned by the user. Seems somewhat more secure than the way I'm trying to do it now (setuid root r...