sembuf
int semop(int semid, struct sembuf *sops, unsigned nsops)
extern int __sys_semop(int, struct sembuf *, unsigned);
sysvipc_semop(int semid, struct sembuf *sops, unsigned nsops)
struct sembuf *sopptr;
int sysvipc_semop(int, struct sembuf *, unsigned);
struct sembuf sops[MAX_SOPS];
struct sembuf *sopptr;
int semop(int, struct sembuf *, unsigned);
struct sembuf * sops; char sops_[PAD_(struct sembuf *)];
struct sembuf sop[2];
struct sembuf s;