77 int get_semaphore(int sem_id, struct sembuf *sembuffer)  in get_semaphore()  argument
79 	sembuffer->sem_num = 0;  in get_semaphore()
80 	sembuffer->sem_op  = -1;  in get_semaphore()
81 	sembuffer->sem_flg = SEM_UNDO;  in get_semaphore()
82 	return semop(sem_id, sembuffer, 1);  in get_semaphore()
85 int put_semaphore(int sem_id, struct sembuf *sembuffer)  in put_semaphore()  argument
87 	sembuffer->sem_num = 0;  in put_semaphore()
88 	sembuffer->sem_op  = 1;  in put_semaphore()
89 	sembuffer->sem_flg = SEM_UNDO;  in put_semaphore()
90 	return semop(sem_id, sembuffer, 1);  in put_semaphore()
131 	struct sembuf sembuffer;  in main()  local
238 		if (get_semaphore(semid, &sembuffer)) {  in main()
265 			if (put_semaphore(semid, &sembuffer))  in main()
269 			if (get_semaphore(semid, &sembuffer))  in main()
271 			if (put_semaphore(semid, &sembuffer))  in main()
278 	if (forkflag && get_semaphore(semid, &sembuffer)) {  in main()
292 	if (forkflag && put_semaphore(semid, &sembuffer)) {  in main()