1struct semid_ds {
 2	struct ipc_perm sem_perm;
 3	unsigned long __sem_otime_lo;
 4	unsigned long __sem_otime_hi;
 5	unsigned long __sem_ctime_lo;
 6	unsigned long __sem_ctime_hi;
 7	unsigned short sem_nsems;
 8	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
 9	long __unused3;
10	long __unused4;
11	time_t sem_otime;
12	time_t sem_ctime;
13};