How to get a list of path ancestry

Short question that I can't find an answer to. Is there a way to
obtain a clear list for a given path in a repository at a given
revision, all the paths that path has in the past decended from (ie
paths that were copied to form it).

An example of what I'm looking for (not a real command!)....

---cut---
me_at_myhost:~$ svn list-ancestry -r100 svn://localhost/foo/bar.c
r100 /foo/bar.c
r90 /foo/barf.c
r80 /barf.c
---cut---

Which shows that in r80 /barf.c was created as a new file, then in r90
/barf.c was copied to /foo/barf.c which was copied in r100 to
/foo/bar.c

-- 
James Sleeman
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