18 	struct flock fl;  in do_lock_exclusive()  local
21 	memset((void *)&fl, 0, sizeof(fl));  in do_lock_exclusive()
23 	fl.l_type = F_WRLCK;  in do_lock_exclusive()
24 	fl.l_whence = fl.l_start = 0;  in do_lock_exclusive()
25 	fl.l_len = 0; /* 0 means "to end of file" */  in do_lock_exclusive()
27 	res = fcntl(fd, F_SETLK, &fl);  in do_lock_exclusive()
37 	struct flock fl;  in do_unlock()  local
39 	memset((void *)&fl, 0, sizeof(fl));  in do_unlock()
41 	fl.l_type = F_UNLCK;  in do_unlock()
42 	fl.l_whence = fl.l_start = 0;  in do_unlock()
43 	fl.l_len = 0; /* 0 means "to end of file" */  in do_unlock()
45 	return fcntl(fd, F_SETLK, &fl);  in do_unlock()