struct msqid_ds

{

	struct ipc_perm msg_perm;

	time_t msg_stime;

	time_t msg_rtime;

	time_t msg_ctime;

	unsigned long msg_cbytes;

	msgqnum_t msg_qnum;

	msglen_t msg_qbytes;

	pid_t msg_lspid;

	pid_t msg_lrpid;

	unsigned long __unused[2];

};