[PATCH] Linux: Add execveat system call wrapper

[Adhemerval Zanella]

On 08/12/2020 12:18, Florian Weimer wrote:
> * Adhemerval Zanella:
> 
>> On 03/12/2020 11:20, Alexandra Hájková via Libc-alpha wrote:
>>> From: Alexandra Hájková <ahajkova@redhat.com>
>>>
>>>  Also add the test for the new wrapper.
>>> ---
>>> This version:
>>>  * extends NEWS entry
>>>  * adds various one line comments
>>>  * uses exit $FOO instead of exit 3 to test if FOO was set properly
>>>  * removes the implicit check
>>>  * improves comments
>>>  * removes unnecessary Makefile change
>>>  * returns INLINE_SYSCALL_CALL return value
>>>
>>>
>>
>> There are some formatting issues on comment the test, I think we should
>> nonnull for envp as well, and some changes on the Linux implementation
> 
> I think envp == NULL is a well-documented Linux extension, in wide use
> with execve.

But the generic interface returns EINVAL for NULL envp.  Should we change
it to accept NULL then?