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From: "Carlo Marcelo Arenas Belón" <carenas@gmail.com>
To: git@vger.kernel.org
Cc: chris.torek@gmail.com, gitster@pobox.com,
	phillip.wood123@gmail.com,
	"Carlo Marcelo Arenas Belón" <carenas@gmail.com>
Subject: [RFC PATCH 0/2] daemon: tracking childs without signals
Date: Thu, 26 Jun 2025 14:22:32 -0700	[thread overview]
Message-ID: <20250626212234.88570-1-carenas@gmail.com> (raw)
In-Reply-To: <20250626182432.87523-1-carenas@gmail.com>

This is a minimum POC of what could be done to remove signals when
handling children in git-daemon.

The advantage is that it is at least portable to *NIX systems, unlike
using a Linux specific API like pidfd which also allows collecting
status from children through fds.

It has to do some innefficient management of the fds array that is
given to poll, and wouldn't work as a general solution, since the
children could close the pipe() used for tracking unintentionally,
but since we control both sides in this case, that might not be a
problem.

Carlo Marcelo Arenas Belón (2):
  run-command: add a pipe() write end to childs
  daemon: poor man's pidfd like POC

 daemon.c      | 74 ++++++++++++++++++++++++++++++++++++---------------
 run-command.c |  3 +++
 run-command.h |  2 ++
 3 files changed, 57 insertions(+), 22 deletions(-)

-- 
2.39.5 (Apple Git-154)


  reply	other threads:[~2025-06-26 21:22 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-06-24 14:08 [PATCH 0/3] daemon: explicitly allow EINTR during poll() Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-24 14:08 ` [PATCH 1/3] compat/posix.h: track SA_RESTART fallback Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-24 15:34   ` Junio C Hamano
2025-06-24 16:28   ` Junio C Hamano
2025-06-24 14:08 ` [PATCH 2/3] daemon: use sigaction() to install child_handler() Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-24 15:37   ` Junio C Hamano
2025-06-24 22:29     ` Carlo Marcelo Arenas Belón
2025-06-24 23:27       ` Chris Torek
2025-06-24 16:20   ` Junio C Hamano
2025-06-24 21:28     ` Carlo Marcelo Arenas Belón
2025-06-24 21:32       ` Junio C Hamano
2025-06-24 14:08 ` [PATCH 3/3] daemon: explicitly allow EINTR during poll() Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-24 14:33   ` Carlo Marcelo Arenas Belón
2025-06-24 15:43   ` Junio C Hamano
2025-06-25  7:35 ` [PATCH v2 0/3] " Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-25  7:35   ` [PATCH v2 1/3] compat/posix.h: track SA_RESTART fallback Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-25 16:07     ` Junio C Hamano
2025-06-25 22:24       ` Carlo Marcelo Arenas Belón
2025-06-26  0:33         ` Junio C Hamano
2025-06-26  1:35           ` Carlo Marcelo Arenas Belón
2025-06-26  0:45     ` Junio C Hamano
2025-06-25  7:35   ` [PATCH v2 2/3] daemon: use sigaction() to install child_handler() Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-25 16:06     ` Junio C Hamano
2025-06-25 16:22       ` Junio C Hamano
2025-06-25  7:35   ` [PATCH v2 3/3] daemon: explicitly allow EINTR during poll() Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-25 16:11     ` Junio C Hamano
2025-06-25  8:39   ` [PATCH v2 0/3] " Phillip Wood
2025-06-25 16:24     ` Junio C Hamano
2025-06-25 19:35       ` Phillip Wood
2025-06-26 18:24         ` [RFC PATCH] daemon: add a self pipe to trigger reaping of children Carlo Marcelo Arenas Belón
2025-06-26 21:22           ` Carlo Marcelo Arenas Belón [this message]
2025-06-26 21:22             ` [RFC PATCH 1/2] run-command: add a pipe() write end to childs Carlo Marcelo Arenas Belón
2025-06-26 21:22             ` [RFC PATCH 2/2] daemon: poor man's pidfd like POC Carlo Marcelo Arenas Belón
2025-06-27  8:38           ` [RFC PATCH] daemon: add a self pipe to trigger reaping of children Phillip Wood
2025-06-28  6:19             ` Carlo Marcelo Arenas Belón
2025-07-01 13:38               ` Phillip Wood
2025-06-30 15:16             ` Junio C Hamano
2025-06-25 16:07   ` [PATCH v2 0/3] daemon: explicitly allow EINTR during poll() Junio C Hamano
2025-06-26  8:50     ` Carlo Marcelo Arenas Belón
2025-06-26  8:53   ` [PATCH v3 0/4] " Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-26  8:53     ` [PATCH v3 1/4] compat/posix.h: track SA_RESTART fallback Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-27  1:41       ` Junio C Hamano
2025-06-26  8:53     ` [PATCH v3 2/4] compat/mingw: allow sigaction(SIGCHLD) Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-26 12:52       ` Phillip Wood
2025-06-26 13:15         ` Carlo Marcelo Arenas Belón
2025-06-26 13:56           ` Phillip Wood
2025-06-26 14:58             ` Carlo Marcelo Arenas Belón
2025-06-26 15:19               ` phillip.wood123
2025-06-26 20:09                 ` Carlo Marcelo Arenas Belón
2025-07-09 14:13                   ` Phillip Wood
2025-07-09 16:36                     ` Carlo Marcelo Arenas Belón
2025-06-26  8:53     ` [PATCH v3 3/4] daemon: use sigaction() to install child_handler() Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-26 13:11       ` Phillip Wood
2025-06-26 15:33         ` Junio C Hamano
2025-06-26 16:36           ` Carlo Marcelo Arenas Belón
2025-06-26 18:04             ` Phillip Wood
2025-07-07 22:14               ` Junio C Hamano
2025-06-26  8:53     ` [PATCH v3 4/4] daemon: explicitly allow EINTR during poll() Carlo Marcelo Arenas Belón via GitGitGadget
2025-06-26 13:14       ` Phillip Wood
2025-07-09 14:12     ` [PATCH v3 0/4] " Phillip Wood
2025-07-09 17:04       ` Carlo Marcelo Arenas Belón
2025-07-10 19:45     ` [PATCH v4 0/2] " Carlo Marcelo Arenas Belón via GitGitGadget
2025-07-10 19:45       ` [PATCH v4 1/2] compat/mingw: allow sigaction(SIGCHLD) Carlo Marcelo Arenas Belón via GitGitGadget
2025-07-10 21:38         ` Eric Sunshine
2025-07-10 19:45       ` [PATCH v4 2/2] daemon: use sigaction() to install child_handler() Carlo Marcelo Arenas Belón via GitGitGadget
2025-07-10 21:26       ` [PATCH v4 0/2] daemon: explicitly allow EINTR during poll() Junio C Hamano
2025-07-10 23:18         ` Carlo Arenas
2025-07-11 13:14         ` Phillip Wood
2025-07-14 21:52           ` Junio C Hamano
2025-07-15  9:29             ` Phillip Wood

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