struct semid_ds {
	struct ipc_perm sem_perm;
	unsigned long __sem_otime_hi;
	unsigned long __sem_otime_lo;
	unsigned long __sem_ctime_hi;
	unsigned long __sem_ctime_lo;
	unsigned short __sem_nsems_pad, sem_nsems;
	long __unused3;
	long __unused4;
	time_t sem_otime;
	time_t sem_ctime;
};