When I first packaged mon I looked to package the File::Df module (which
one of the monitors can make use of), but couldn't because it lacked a
copyright notice. I wrote the author but never got word back. I found
this mentioned in my todo list for mon and checking up I found that the
module has been renamed to Filesys::Diskspace and it now has copying
terms (GPL or Artistic). So, I'm going to package it up for mon's use,
I'll call it libfilesys-diskspace-perl.