Message-ID: <003457fd-cc74-4e6a-bc0e-2891d40d4621@dunslane.net>
Date: Mon, 24 Jun 2024 16:58:33 -0400
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: pgsql: Skip some permissions checks on Cygwin
To: Noah Misch <noah@leadboat.com>, marco atzeri <marco.atzeri@gmail.com>
Cc: pgsql-committers@lists.postgresql.org
References: <E1sHjJc-001KCN-H6@gemulon.postgresql.org>
 <20240624010311.0b.nmisch@google.com>
 <fb2c5702-a51d-4d15-a523-83a0443f0df5@dunslane.net>
 <20240624204221.42.nmisch@google.com>
From: Andrew Dunstan <andrew@dunslane.net>
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On 2024-06-24 Mo 4:42 PM, Noah Misch wrote:
> On Mon, Jun 24, 2024 at 10:17:32AM -0400, Andrew Dunstan wrote:
>> On 2024-06-23 Su 9:03 PM, Noah Misch wrote:
>>> On Thu, Jun 13, 2024 at 12:12:29PM +0000, Andrew Dunstan wrote:
>>>> Skip some permissions checks on Cygwin
>>>>
>>>> These are checks that are already skipped on other Windows systems.
>>>>    	skip "unix-style permissions not supported on Windows", 2
>>>> -	  if ($windows_os);
>>>> +	  if ($windows_os || $Config::Config{osname} eq 'cygwin');
>>>> -	skip "group access not supported on Windows", 3 if ($windows_os);
>>>> +	skip "group access not supported on Windows", 3
>>>> +	  if ($windows_os || $Config::Config{osname} eq 'cygwin');
>>> Cygwin does support Unix-style permissions, so I'm not following the rationale
>>> for this change.  Can you say more?
>> It seems to have some difficulties with group permissions in some cases. I
>> improved the error message a bit, and got a bunch that all look like this:
>>
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/global/6303
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/global/pg_control
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/global/pg_filenode.map
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/base/5
>> mode must be 0750, not 0000000000000000000000000000000000000700
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/base/5/112
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/base/5/113
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/base/5/1247
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/base/5/1247_fsm
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/base/5/1247_vm
>> mode must be 0640, not 0600
>> build/testrun/initdb/001_initdb/log/regress_log_001_initdb:*main::STDERR/home/Administrator/postgresql/build/testrun/initdb/001_initdb/data/tmp_test_qlhf/data_group/base/5/1249
>> mode must be 0640, not 0600
>>
>>
>> Apparently there's some issue with the group None. I don't mind digging
>> further if you think it might be worthwhile, but it seemed to me that since
> I'll guess digging further is not worthwhile.  Even if it is a PostgreSQL bug,
> the consequences seem limited to unintentionally withholding group access.
> There's a remote chance you're using a "noacl" mount, where this result could
> fit.


mount doesn't show noacl being used


>
>> we didn't mind too much skipping these checks on native Windows we wouldn't
>> mind on Cygwin either.
> The reasons for skipping the test are different on native Windows (does not
> provide POSIX file modes) vs. Cygwin (has POSIX file modes, but the
> combination of PostgreSQL and Cygwin somehow reaches the wrong mode).


True.


I wonder if Marco can shed any light on what's going on here.


cheers


andrew

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