mrd_request_sense - Get the status of a medium changer.

    Windows NT         mrd.dll
    UNIX               /usr/lib/libmrd.a
    OpenVMS            MRD$RTL.EXE

    #include <mrd_common.h>
    #include <mrd_message.h>

    int mrd_request_sense(
        robot_info_t *robot_info,
        dev_status_t *dev_status,
        int           os_status);