SHMTOTAL
display = SHMTOTAL;
display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
if (display & (SHMINFO | SHMTOTAL))
if (display & SHMTOTAL)
if ((display & (SHMINFO | SHMTOTAL)) &&
if (display & SHMTOTAL)
if (display & (SHMINFO | SHMTOTAL)) {