mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Daniel Palmer <daniel@thingy.jp>
To: w@1wt.eu, linux@weissschuh.net
Cc: linux-kernel@vger.kernel.org, Daniel Palmer <daniel@thingy.jp>
Subject: [PATCH 0/2] nolibc: Add sendfile()
Date: Fri, 28 Aug 2026 19:32:03 +0900	[thread overview]
Message-ID: <20260828103205.384589-1-daniel@thingy.jp> (raw)

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()

 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


             reply	other threads:[~2026-08-28 10:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-28 10:32 Daniel Palmer [this message]
2026-08-28 10:32 ` [PATCH 1/2] tools/nolibc: " Daniel Palmer
2026-08-28 10:32 ` [PATCH 2/2] selftests/nolibc: Add basic test for sendfile() Daniel Palmer
2026-08-28 16:52 ` [PATCH 0/2] nolibc: Add sendfile() Thomas Weißschuh

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20260828103205.384589-1-daniel@thingy.jp \
    --to=daniel@thingy.jp \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@weissschuh.net \
    --cc=w@1wt.eu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox

all inboxes | Powered by JetHome®