1struct semid_ds {
 2	struct ipc_perm sem_perm;
 3	unsigned long __sem_otime_hi;
 4	unsigned long __sem_otime_lo;
 5	unsigned long __sem_ctime_hi;
 6	unsigned long __sem_ctime_lo;
 7	unsigned short __sem_nsems_pad, sem_nsems;
 8	long __unused3;
 9	long __unused4;
10	time_t sem_otime;
11	time_t sem_ctime;
12};