kern_msgctl
error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid);
error = kern_msgctl(td, uap->msqid, uap->cmd, &msqbuf);
error = kern_msgctl(td, uap->msqid, uap->cmd, &msqbuf);
error = kern_msgctl(td, uap->msqid, uap->cmd, &msqbuf);
error = kern_msgctl(td, msqid, cmd, &msqbuf);
int kern_msgctl(struct thread *, int, int, struct msqid_ds *);