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Re: [PATCH v2 3/3] compat/mingw: support POSIX semantics for atomic renames

From
Taylor Blau <me@ttaylorr.com>
Date
Oct 27, 2024, 23:50 UTC
Message-ID
<Zx7Rxz0ZG+Gqwf03@nand.local>
In-Reply-To
<c044ea3c-2f8c-45c1-99cf-17d9dad5b55f@kdbg.org>
On Sun, Oct 27, 2024 at 10:36:55PM +0100, Johannes Sixt wrote:
Show 30 quoted lines
> >> Ah, I was confused twice here. First, the documentation that you cite[*]
> >> mentions FILE_RENAME_POSIX_SEMANTICS, but the name does not exist at
> >> all. There does exist FILE_RENAME_FLAG_POSIX_SEMANTICS. The
> >> documentation is just wrong. And in my earlier comment I copied the
> >> inexistent flag name.
> >>
> >> But I meant to cite this flag: FILE_FLAG_POSIX_SEMANTICS (no "RENAME").
> >> It exists and is for CreateFileW().
> >>
> >> Perhaps you also meant cite the latter one as the flag that "is not for
> >> use with `SetFileInformationByHandle()`"?
> >>
> >> At any rate, the paragraph as written isn't correct.
> >
> > I think I'm missing something. That's what the paragraph says:
> >
> >     Careful readers might have noticed that [1] does not mention the above
> >     flag, but instead mentions `FILE_RENAME_POSIX_SEMANTICS`. This flag is
> >     not for use with `SetFileInformationByHandle()` though, which is what we
> >     use. And while the `FILE_RENAME_FLAG_POSIX_SEMANTICS` flag exists, it is
> >     not documented on [2] or anywhere else as far as I can tell.
> >
> > And I'd claim it is correct.
> >
> > [snip]
> >
> > [1]: https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/ns-ntifs-_file_rename_information
> > [2]: https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/fltkernel/nf-fltkernel-fltsetinformationfile
>
> OK, then let's leave the text as it is.
Thanks, both, for vetting it carefully.

Thanks, Taylor

Previous: Johannes SixtNext: Taylor Blau
Message 35 of 44 in “compat/mingw: implement POSIX-style atomic renames”
  1. 0/3 compat/mingw: implement POSIX-style atomic renamesPatrick Steinhardt, Oct 23, 2024
  2. 1/3 compat/mingw: share file handles created via `CreateFileW()`Patrick Steinhardt, Oct 23, 2024
  3. Kristoffer HaugsbakkOct 23, 2024
  4. Taylor BlauOct 23, 2024
  5. Taylor BlauOct 23, 2024
  6. Taylor BlauOct 23, 2024
  7. Patrick SteinhardtOct 24, 2024
  8. Johannes SixtOct 27, 2024
  9. Taylor BlauOct 27, 2024
  10. 2/3 compat/mingw: allow deletion of most opened filesPatrick Steinhardt, Oct 23, 2024
  11. Kristoffer HaugsbakkOct 23, 2024
  12. Taylor BlauOct 23, 2024
  13. Patrick SteinhardtOct 24, 2024
  14. Taylor BlauOct 23, 2024
  15. 3/3 compat/mingw: support POSIX semantics for atomic renamesPatrick Steinhardt, Oct 23, 2024
  16. Kristoffer HaugsbakkOct 23, 2024
  17. Patrick SteinhardtOct 24, 2024
  18. Kristoffer HaugsbakkOct 24, 2024
  19. Patrick SteinhardtOct 24, 2024
  20. Taylor BlauOct 23, 2024
  21. Taylor BlauOct 23, 2024
  22. 0/3 compat/mingw: implement POSIX-style atomic renamesPatrick Steinhardt, Oct 24, 2024
  23. 1/3 compat/mingw: share file handles created via `CreateFileW()`Patrick Steinhardt, Oct 24, 2024
  24. 2/3 compat/mingw: allow deletion of most opened filesPatrick Steinhardt, Oct 24, 2024
  25. Johannes SixtOct 27, 2024
  26. Patrick SteinhardtOct 27, 2024
  27. Taylor BlauOct 27, 2024
  28. Taylor BlauOct 27, 2024
  29. 3/3 compat/mingw: support POSIX semantics for atomic renamesPatrick Steinhardt, Oct 24, 2024
  30. Johannes SixtOct 27, 2024
  31. Patrick SteinhardtOct 27, 2024
  32. Johannes SixtOct 27, 2024
  33. Patrick SteinhardtOct 27, 2024
  34. Johannes SixtOct 27, 2024
  35. Taylor BlauOct 27, 2024
  36. Taylor BlauOct 24, 2024
  37. Johannes SixtOct 27, 2024
  38. 0/3 compat/mingw: implement POSIX-style atomic renamesPatrick Steinhardt, Oct 27, 2024
  39. 1/3 compat/mingw: share file handles created via `CreateFileW()`Patrick Steinhardt, Oct 27, 2024
  40. 2/3 compat/mingw: allow deletion of most opened filesPatrick Steinhardt, Oct 27, 2024
  41. 3/3 compat/mingw: support POSIX semantics for atomic renamesPatrick Steinhardt, Oct 27, 2024
  42. Junio C HamanoNov 6, 2024
  43. Johannes SixtNov 6, 2024
  44. Junio C HamanoNov 6, 2024

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