-------------------
Display the structure of an image file as a PS.
+
+Greater use of blkid / libblkid
+-------------------------------
+
+guestfs_zero should use wipefs. See wipefs(8).
+
+There are various useful functions in libblkid for listing partitions,
+devices etc which we are essentially duplicating in the daemon. It
+would make more sense to just use libblkid for this.
+
+There are some places where we call out to the 'blkid' program. This
+might be replaced by direct use of the library (if this is easier).