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

[Adhemerval Zanella]

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.