Re: Avoid leaking system path from pg_available_extensions

On 2026-05-26 Tu 9:29 AM, Matheus Alcantara wrote:
> On 26/05/26 04:14, Chao Li wrote:
>>
>>
>>> On May 22, 2026, at 23:40, Matheus Alcantara
>>> <matheusssilv97(at)gmail(dot)com> wrote:
>>>
>>> On 22/05/26 04:25, Jim Jones wrote:
>>>> On 21/05/2026 17:12, Matheus Alcantara wrote:
>>>>> I've reproduced the issue and the fix looks correct to me.
>>>> same here, +1
>>>
>>> Thank you for also testing.
>>>
>>>> I was wondering if creating a constant for it would be, stylistically
>>>> speaking, a cleaner solution. For instance:
>>>> #define EXTENSION_SYSTEM_MACRO  "$system"
>>>> I realize that it's used only inside
>>>> get_extension_control_directories()
>>>> but since it is even mentioned in the docs, I guess it wouldn't be
>>>> a bad
>>>> idea.
>>>
>>> I'm not against it but I don't think that it's necessary since as
>>> you mention, only get_extension_control_directories() use.
>>>
>>
>> In theory, I’m not against the idea either. In practice, there are
>> many hard-coded strings in the source tree, and I’m not sure where
>> the right place would be to define this macro.
>>
>> Since this string is only used in
>> get_extension_control_directories(), and now it is used three times,
>> I defined it at the beginning of the function and undefined it at the
>> end. Let’s see if there are any objections to that.
>>
>> Please see the attached v2.
>>
>
> We have such pattern in other parts of the codebase (e.g
> pg_resetwal.c), so it works for me.
>
> Thanks for the patch.
>
>

Pushed.

cheers

andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com