On Mar 27, 2012, at 3:15 PM, David Holland wrote: > On Mon, Mar 26, 2012 at 06:27:00PM +0300, Jukka Ruohonen wrote: >>> ENXIO seems appropriate. >> >> Or even better: ENOSYS. > > ENXIO is better, it means the requested subsystem is > unavailable/disabled. or ENOEXEC.