1 struct 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 }; 13