# Re: \[PATCH v3 3/5\] selftests/ipc: change test to use ksft framework

- From: Davidlohr Bueso \<dave@stgolabs.net\>
- Date: 2014-10-03 17:40:19 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2014/10/4346443
- Thread: https://ratatoskr.run/linux-api/2014/10/4346353/t.md

```text
On Fri, 2014-10-03 at 09:36 -0600, Shuah Khan wrote:
>  	msgque.key = ftok(argv[0], 822155650);
>  	if (msgque.key == -1) {
> -		printf("Can't make key\n");
> -		return -errno;
> +		printf("Can't make key: %d\n", -errno);

So printing a numeric value is quite useless when users actually run
into these errors -- which is why I like err() so much. How about using
strerror() instead?

Thanks,
Davidlohr
```