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Date: Wed, 30 Apr 2025 13:14:54 +0200
From: Christian Brauner <brauner@kernel.org>
To: linux-fsdevel@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>, 
	Alexander Viro <viro@zeniv.linux.org.uk>, Daan De Meyer <daan.j.demeyer@gmail.com>, 
	David Rheinsberg <david@readahead.eu>, Eric Dumazet <edumazet@google.com>, 
	Jakub Kicinski <kuba@kernel.org>, Jan Kara <jack@suse.cz>, Kuniyuki Iwashima <kuniyu@amazon.com>, 
	Lennart Poettering <lennart@poettering.net>, Luca Boccassi <bluca@debian.org>, Mike Yuan <me@yhndnzj.com>, 
	Oleg Nesterov <oleg@redhat.com>, Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>, 
	Zbigniew =?utf-8?Q?J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH RFC 0/3] coredump: support AF_UNIX sockets
Message-ID: <20250430-devotionalien-umgewandelt-5bf0eb664caa@brauner>
References: <20250430-work-coredump-socket-v1-0-2faf027dbb47@kernel.org>
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In-Reply-To: <20250430-work-coredump-socket-v1-0-2faf027dbb47@kernel.org>

> This is easy to test:
> 
> (a) coredump processing (we're using socat):
> 
>     > cat coredump_socket.sh
>     #!/bin/bash
>     
>     set -x
>     
>     sudo bash -c "echo ':/tmp/stream.sock' > /proc/sys/kernel/core_pattern"
>     socat --statistics unix-listen:/tmp/stream.sock,fork FILE:core_file,create,append,truncate

Don't use "truncate" please. It's not a socat option and it won't work.
The correct option is "trunc".