msqid_ds_old
struct msqid_ds_old *buf;
struct msqid_ds_old msqold;
error = copyout(&msqold, uap->buf, sizeof(struct msqid_ds_old));
char buf_l_[PADL_(struct msqid_ds_old *)]; struct msqid_ds_old * buf; char buf_r_[PADR_(struct msqid_ds_old *)];