Re: TAP tests aren't using the magic words for Windows file access

On 11/20/19 3:40 PM, Thomas Munro wrote:
> On Fri, Nov 8, 2019 at 3:41 AM Andrew Dunstan
> <andrew.dunstan@2ndquadrant.com> wrote:
>> On 11/7/19 9:12 AM, Alvaro Herrera wrote:
>>>> The patch says:
>>>>
>>>> +        require Win32::API;
>>>> +        Win32::API->import;
>>> Oh, you're right, it does.  I wonder why, though:
>>>
>> On further inspection I think those lines are unnecessary. The remainder
>> of the patch doesn't use this at all, AFAICT.
> So does that mean we're back on, we can use a patch like Juan Jose's?
> I'd love to get rid of these intermittent buildfarm failures, like
> this one just now:
>
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=drongo&dt=2019-11-20%2010%3A00%3A10
>
> Here you can see:
>
> could not read "C:/prog/bf/root/HEAD/pgsql.build/src/bin/pg_ctl/tmp_check/t_004_logrotate_primary_data/pgdata/current_logfiles":
> Permission denied at
> C:/prog/bf/root/HEAD/pgsql.build/src/test/perl/TestLib.pm line 397.
>
> That line is in the subroutine slurp_file, and says open(my $in, '<',
> $filename).  Using various clues from this thread, it seems like we
> could, on Windows only, add code to TestLib.pm's INIT to rebind
> *CORE::GLOBAL::open to a wrapper function that would just do
> CreateFile(..., PLEASE_BE_MORE_LIKE_UNIX, ...).


Possibly. I will do some testing on drongo in the next week or so.