SHUT_RD
#define SHUT_RD 0
SHUT_RD = 0, /* No more receptions. */
# define SHUT_RD SHUT_RD
#define SHUT_RD SD_RECEIVE
SHUT_RD = 0, /* shut down the reading side */
#define SHUT_RD SHUT_RD
#define SHUT_RD SHUT_RD