struct semid_ds {
struct ipc_perm sem_perm;
time_t sem_otime;
time_t sem_ctime;
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned short sem_nsems;
char __sem_nsems_pad[sizeof(time_t) - sizeof(short)];
#else
char __sem_nsems_pad[sizeof(time_t) - sizeof(short)];
unsigned short sem_nsems;
#endif
time_t __unused3;
time_t __unused4;
};