> On 26 Aug 2020, at 09:56, Michael Paquier <mich...@paquier.xyz> wrote:
> On Tue, Aug 25, 2020 at 03:52:14PM +0200, Daniel Gustafsson wrote:

>> The attached moves all invocations under the correct guards.  RAND_poll() in
>> fork_process.c needs to happen for both OpenSSL and OpenSSL random, thus the
>> check for both.
> 
> Yeah, it could be possible that somebody still calls RAND_bytes() or
> similar without going through pg_strong_random(), so we still need to
> use USE_OPENSSL after forking.  Per this argument, I am not sure I see
> the point of the change in fork_process.c as it seems to me that 
> USE_OPENSSL_RANDOM should only be tied to pg_strong_random.c, and
> you'd still get a compilation failure if trying to use
> USE_OPENSSL_RANDOM without --with-openssl.

That's certainly true.  The intention though is to make the code easier to
follow (more explicit/discoverable) for anyone trying to implement support for
TLS backends. It's a very git grep intense process already as it is.

cheers ./daniel

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