(make-tar file mode uid gid size mod-time type [link])
(write-tar tar out)
(tar-path tar)
(tar-path-set! tar path)
(tar-fold src kons knil)
(tar-safe? tarball)
(tar-files tarball)
(tar-extract tarball [rename])
(tar-extract-file tarball file)
(tar-create tarball files [rename no-recurse?])