ScrStatus
#define SCRIOSTATUS _IOR ('S', 1, ScrStatus) /* return card in/out, card on/off */
#define SCRIOSTATUS _IOR ('S', 1, ScrStatus) /* return card in/out, card on/off */
ScrStatus * pIoctlStatus; /* pointer to status ioctl */
pIoctlStatus = (ScrStatus*)data;