[Zope] How to get the path?

Hi all, I want to upload files to the filesystem on my server (not into zope's Data.fs) With <input type="file" name="file"> I get the filename...right? But If I want to copy it with an external method like this: copy = os.system('cp %s /tmp' %file.filename) it doesent work because file.filename is only the file but not the path... (for example test.pdf) How do I get the path?