Re: [PATCH v3 0/3] nolibc: Add dirfd()

[linux@weissschuh.net]

On 2026-10-31 13:29:57+0900, Daniel Palmer wrote:
> Add dirfd() to convert a DIR back to an fd for functions like fstatat()
> that take an fd.
> 
> Change log:
> v3 - Split the internal helper into its own commit.
>    - test: just stat one child instead of all of them
>    - According to POSIX (https://man7.org/linux/man-pages/man3/dirfd.3.html) errno
>      should be EINVAL on failure, so closedir() is now untouched as it is setting EBADF.
>      This makes the diff a little cleaner too.
>    - Replace i with fd in some places so isn't confused with -1.
>    - Due to all of the changes I didn't add trailers from v2.
> v2 - Fix the name of the dirfd helper, I debated over removing the helper
>      as suggested by Thomas but it seems right to have the logic in a single
>      place.
>      Add test a basic test to make sure dirfd() actually does convert back
>      to the expected fd and using dirfd() with fstatat().
> 
> Daniel Palmer (3):
>   tools/nolibc: Add internal __nolibc_dirfd() helper
>   tools/nolibc: Add dirfd()
>   selftests/nolibc: Add test for dirfd()

Applied, thanks!

Note: Now I hate that we sometime override readdir_r() for the selftests.
I tried to enable your tests for non-nolibc builds but was running into
EINVAL errors and was wondering where these came from. I'll drop that
local definition and just disable the deprecation warnings.

>  tools/include/nolibc/dirent.h                | 37 ++++++++++++++----
>  tools/testing/selftests/nolibc/nolibc-test.c | 40 ++++++++++++++++++++
>  2 files changed, 70 insertions(+), 7 deletions(-)
> 
> -- 
> 2.53.0
>