Re: pg_basebackup check vs Windows file path limits - Mailing list pgsql-hackers

On 2023-11-15 We 06:34, Alvaro Herrera wrote:
> On 2023-Nov-13, Andrew Dunstan wrote:
>
>>> size?
>>>
>>> https://learn.microsoft.com/en-us/windows/win32/api/ioapiset/nf-ioapiset-deviceiocontrol
>> Hmm, here's what that page says - I can't see it saying what you're
>> suggesting here - am I missing something?:
> I don't think so.  I think I just confused myself.  Reading the docs it
> appears that other Windows APIs work as I described, but not this one.
>
> Anyway, after looking at it a bit more, I realized that this code uses
> MAX_PATH as basis for its buffer's length limit -- and apparently on
> Windows that's only 260, much shorter than MAXPGPATH (1024) which our
> own code uses to limit the buffers given to readlink().  So maybe fixing
> this is just a matter of doing s/MAX_PATH/MAXPGPATH/ in dirmod.c.



I'll test it.


cheers


andrew

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