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 __pad1;
unsigned long __pad2;
};