rem: status = user_strlcpy(userName, name, nameLength); return (status == B_OK ? fdCloser.Detach() : status);
add: int len = user_strlcpy(userName, name, nameLength); if (len < 0) return len; if (len >= (int)nameLength) return B_BUFFER_OVERFLOW;  return fdCloser.Detach();
context: _user_open_parent_dir(int fd, char *userName, size_t nameLength){	bool kernel = false;	if (!IS_USER_ADDRESS(userName))		return B_BAD_ADDRESS;	// open the parent dir	int parentFD = dir_open(fd, "..", kernel);	if (parentFD < 0)		return parentFD;	FDCloser fdCloser(parentFD, kernel);	// get the vnodes	struct vnode *parentVNode = get_vnode_from_fd(parentFD, kernel);	struct vnode *dirVNode = get_vnode_from_fd(fd, kernel);	VNodePutter parentVNodePutter(parentVNode);	VNodePutter dirVNodePutter(dirVNode);	if (!parentVNode || !dirVNode)		return B_FILE_ERROR;	// get the vnode name	char name[B_FILE_NAME_LENGTH];	status_t status = get_vnode_name(dirVNode, parentVNode,		name, sizeof(name));	if (status != B_OK)		return status;	status = user_strlcpy(userName, name, nameLength);	return (status == B_OK ? fdCloser.Detach() : status);}