api.h

#define RD_CREAT _IOR('G', 0, char *)
#define RD_MKDIR _IOR('G', 1, char *)
#define RD_OPEN _IOR('G', 2, char *)
#define RD_CLOSE _IOR('G', 3, int) 
#define RD_READ _IOWR('G', 4, struct Params) //param data structure
#define RD_WRITE _IOWR('G', 5, struct Params) //param ds
#define RD_LSEEK _IOR('G', 6, struct Params) //param ds
#define RD_UNLINK _IOR('G', 7, char *)
#define RD_READDIR _IOWR('G', 8, struct Params) //param ds


typedef struct Params{

int fd;
char *addr;
int count;
} Params;


int rd_creat(char *pathname);
int rd_mkdir(char *pathname);
int rd_open(char *pathname);
int rd_close(int fd);
int rd_read(int fd, char *address, int num_bytes);
int rd_write(int fd, char *address, int num_bytes);
int rd_lseek(int fd, int offset);
int rd_unlink(char *pathname);
int rd_readdir(int fd, char *address);