[PATCH v2] linux: wait4: Fix incorrect return value comparison

[Adhemerval Zanella]

On 09/04/2020 12:35, Florian Weimer wrote:
> * Alistair Francis via Libc-alpha:
> 
>> On Tue, Apr 7, 2020 at 6:25 AM Adhemerval Zanella via Libc-alpha
>> <libc-alpha@sourceware.org> wrote:
>>>
>>>
>>>
>>> On 07/04/2020 08:23, Florian Weimer via Libc-alpha wrote:
>>>> * Alistair Francis via Libc-alpha:
>>>>
>>>>> Path 600f00b "linux: Use long time_t for wait4/getrusage" introduced
>>>>
>>>> Typo: "Path"
>>>>
>>>>> two bugs:
>>>>>  - The usage32 struct was set if the wait4 syscall had an error.
>>>>>  - For 32-bit systems the usage struct was set even if it was specified
>>>>>    as NULL.
>>>>>
>>>>> This patch fixes the two issues.
>>>>
>>>> Would it make sense to include a test case?
>>>>
>>>> (Somehow, my earlier message did not make it it to the list.)
>>>
>>> I think it would, specially now that glibc does more internally.
>>
>> I agree.
>>
>> Would you like me to write it or does someone who knows more about the
>> glibc tests like to do it?
> 
> It looks like we should commit the patch sooner than later.
> 
> We can work on the test case next week.  Either I can teach you to how
> to write it, or I can write it myself.
> 
> Would you please post a v3 with just the indentation fixes?

I think we can posix/tst-waitid.c as a starting point.