+extern int guestfs_tar_in (guestfs_h *handle, const char *tarfile, const char *directory);
+extern int guestfs_tar_out (guestfs_h *handle, const char *directory, const char *tarfile);
+extern int guestfs_tgz_in (guestfs_h *handle, const char *tarball, const char *directory);
+extern int guestfs_tgz_out (guestfs_h *handle, const char *directory, const char *tarball);