NAME
       CD_EJECT -- open or close the cd's drive door

   IO REQUEST
       io_Command      CD_EJECT
       io_Data         NULL
       io_Length       requested state of drive door (0 == close, 1 == open)
       io_Offset       0

   RESULTS
       io_Error        0 for success, or an error code as defined in
                       <devices/cd.h>
       io_Actual       previous state of drive door

   FUNCTION
       This command causes the CD-ROM drive's door to open or close.
       The desired state of the drive door is placed in io_Length.  The
       previous state of the drive door is returned in io_Actual.

   EXAMPLE

   NOTES

   BUGS

   SEE ALSO