IPCID_TO_IX
msqid = IPCID_TO_IX(msqid);
msqid = IPCID_TO_IX(msqid);
msqid = IPCID_TO_IX(msqid);
semid = IPCID_TO_IX(semid);
semid = IPCID_TO_IX(semid); /* Convert back to zero origin */
segnum = IPCID_TO_IX(shmid);
segnum = IPCID_TO_IX(shmmap_s->shmid);
shm_last_free = IPCID_TO_IX(uap->shmid);
shmsegs[IPCID_TO_IX(shmmap_s->shmid)].shm_nattch++;
segnum = IPCID_TO_IX(shmid);
segnum = IPCID_TO_IX(shmid);
shm_deallocate_segment(IPCID_TO_IX(shmctl_msg->shmid));
shm_last_free = IPCID_TO_IX(shmctl_msg->shmid);