Re: [PATCH 0/2] nolibc: Add sendfile()

[Thomas Weißschuh]

Aug 28, 2026 12:32:21 Daniel Palmer <daniel@xxxxxxxxx>:

> This is another thing from my backlog[0] and seemed simple enough so
> sending now. Also, this feels right for nolibc as it lets you move lots
> of data around without needing to allocate memory or even transfer it
> into userspace. I've used it to implement cp and dd in my 64KB userspace
> for linux on the sega megadrive.
>
> There is some 32bit weirdness again, I think I caught that and added
> some static asserts to make sure it doesn't silently break.
>
> Maybe the test should actually test the offset?
>
> 0 - fallocate(), static pie, sockets,...
>
> Daniel Palmer (2):
>   tools/nolibc: Add sendfile()
>   selftests/nolibc: Add basic test for sendfile()

Looks good, thanks!
I have applied the  patches with some minor changes
and will push them out after -rc1.

> tools/include/nolibc/Makefile                |  1 +
> tools/include/nolibc/nolibc.h                |  1 +
> tools/include/nolibc/sys/sendfile.h          | 41 ++++++++++++
> tools/testing/selftests/nolibc/nolibc-test.c | 70 ++++++++++++++++++++
> 4 files changed, 113 insertions(+)
> create mode 100644 tools/include/nolibc/sys/sendfile.h
>
> --
> 2.53.0