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

- From: Davidlohr Bueso \<hidden\>
- Date: 2014-10-03 20:01:34 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2014/10/4346489
- Thread: https://ratatoskr.run/linux-api/2014/10/4346353/t.md

```text
On Fri, 2014-10-03 at 13:42 -0600, Shuah Khan wrote:
> On 10/03/2014 11:39 AM, Davidlohr Bueso wrote:
> > 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?
> > 
> 
> Yes. using perror() does give better information. There are other
> places in this file that use errno. How about I make that a separate
> patch and catch all of them at once to use perror() as a follow-up
> change? That way I fix all at once without adding more changes to
> this patch.

Sounds good.
```