Re: fix tablespace handling in pg_combinebackup

From: Alexander Lakhin <exclusion(at)gmail(dot)com>
To: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: fix tablespace handling in pg_combinebackup
Date: 2024-04-21 12:00:00
Message-ID: 33ae66c2-a9a1-db1c-9361-79d55842430a@gmail.com
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Hello Thomas and Robert,

20.04.2024 08:56, Thomas Munro wrote:
> ... it still broke[4]. So I'm not sure what's going on...
>

From what I can see, the following condition (namely, -l):
                if ($path =~ /^pg_tblspc\/(\d+)$/ && -l "$backup_path/$path")
                {
                    push @tsoids, $1;
                    return 0;
                }

is false for junction points on Windows (cf [1]), but the target path is:
 Directory of
C:\src\postgresql\build\testrun\pg_combinebackup\002_compare_backups\data\t_002_compare_backups_primary_data\backup\backup1\pg_tblspc

04/21/2024  02:05 PM    <DIR>          .
04/21/2024  02:05 PM    <DIR>          ..
04/21/2024  02:05 PM    <JUNCTION>     16415 [\??\C:\Users\ADMINI~1\AppData\Local\Temp\xXMfNDMCot\ts1backup]

[1] https://www.perlmonks.org/?node_id=1223819

Best regards,
Alexander

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