[PATCH v7] getrandom system call wrapper [BZ #17252]

[Florian Weimer]

On 11/16/2016 05:41 PM, Zack Weinberg wrote:
> On Wed, Nov 16, 2016 at 10:52 AM, Florian Weimer <fweimer@redhat.com> wrote:
>> On 11/16/2016 04:20 PM, Zack Weinberg wrote:
>>> I am seriously considering escalating my disagreement here to a
>>> formal objection.  I would like to know why you think it is
>>> NECESSARY - not merely convenient or consistent with other stuff -
>>> for this function to be a cancellation point.
>>
>> It's necessary if you ever want to cancel a hanging getrandom in a
>> context where you cannot install a signal handler (so that you can
>> trigger EINTR when getrandom is stuck).
>
> That only pushes the question back a level.  When would it ever be
> necessary to do that?  Be as concrete as you possibly can.  Actual
> code from a real program, if possible.

It's not clear to me what you are asking here.

Do you mean cancellation in general, or cancellation in conjunction with 
getrandom specifically?

Thanks,
Florian