Re: primary_conninfo missing from pg_stat_wal_receiver

On Thu, Jun 30, 2016 at 6:01 AM, Alvaro Herrera
<alvherre@2ndquadrant.com> wrote:
> Alvaro Herrera wrote:
>
>> I propose to push this patch, closing the open item, and you can rework
>> on top -- I suppose you would completely remove the original conninfo
>> from shared memory and instead only copy the obfuscated version there
>> (and probably also remove the ready_to_display flag).  I think we'd need
>> to see the patch before deciding whether we want it in 9.6 or not,
>> keeping in mind that having the conninfo in shared memory is a
>> pre-existing problem, unrelated to the pgstats view new in 9.6.
>
> Pushed this.  Feel free to tinker further with it, if you feel the need
> to.
>
> Regarding backpatching the clearing of shared memory, I'm inclined not
> to.  If there is a real security concern there (I'm unsure what attack
> are we protecting against), it may be better fixed by the approach
> suggested by Fujii whereby the sensitive info is not ever published in
> shared memory.

Yes, this is not going to be pretty invasive anyway. The cleanest way
to handle things here would be to refactor a bit xlog.c
(xlogparams.c?) so as readRecoveryCommandFile is exposed in its own
file, and the recovery parameters are handled in a single structure,
which is the return result of the call. To reduce a bit the cruft in
xlog.c that would be nice anyway I guess.
-- 
Michael