1struct msqid_ds {
2	struct ipc_perm msg_perm;
3	time_t msg_stime;
4	int __unused1;
5	time_t msg_rtime;
6	int __unused2;
7	time_t msg_ctime;
8	int __unused3;
9	unsigned long msg_cbytes;
10	msgqnum_t msg_qnum;
11	msglen_t msg_qbytes;
12	pid_t msg_lspid;
13	pid_t msg_lrpid;
14	unsigned long __unused[2];
15};
16