While looking at sysctl machdep on sparc, I noticed that
   machdep.booted_kernel will return an error if you boot up
   a NetBSD partition without either setting boot-file in the
   prom or manually supplying it.  Shouldn't we return the default
   kernel name if the boot-file is a null length string (and
   hence the loader has filled in the gap) ?


a reasonable default should probably be emitted, yeah.


.mrg.