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#if __BYTE_ORDER == __LITTLE_ENDIAN
 8	unsigned short sem_nsems;
 9	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
10#else
11	char __sem_nsems_pad[sizeof(long)-sizeof(short)];
12	unsigned short sem_nsems;
13#endif
14	long __unused3;
15	long __unused4;
16	time_t sem_otime;
17	time_t sem_ctime;
18};