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