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From: Jonny Grant <jg@jguk.org>
To: Michael Kerrisk <mtk.manpages@gmail.com>,
	linux-man <linux-man@vger.kernel.org>
Subject: Re: core man page %e
Date: Mon, 1 Jun 2020 11:21:07 +0100
Message-ID: <99a02979-3d47-6ef8-c619-00d9115321ec@jguk.org> (raw)
In-Reply-To: <ae5293ba-17dd-fd6d-54b0-312a008e3167@jguk.org>

Hi Mtk,

BTW, if I add "%P-%e-%s.core" every core starts with the same
"P1000-"

The man page shows:
  %P  PID of dumped process, as seen in the initial PID namespace
                (since Linux 3.12)

Do you see similar? I was only needing something to make the filename unique, so %t is enough.

Cheers, Jonny


On 30/05/2020 11:39, Jonny Grant wrote:
> Hello mtk
> 
> I've noticed "%e-%s.core" often gives something other than the filename and the name is truncated to 16 bytes:-
> 
> ThreadPoolServi-5.core
> Chrome_InProcUt-5.core
> 
> This was set:
> sysctl -w kernel.core_pattern="%e-%s.core"
> 
> 
> 
> In multithreaded applications it looks like %e is giving something other than the filename, perhaps a thread entry-point 
> symbol name.
> 
> https://www.man7.org/linux/man-pages/man5/core.5.html
> 
>             %e  executable filename (without path prefix)
> 
> Could this be updated to:
> 
>             %e  executable filename or thread name truncated to 16 bytes
> 
> Cheers, Jonny

  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-30 10:39 Jonny Grant
2020-06-01 10:21 ` Jonny Grant [this message]
2020-06-09  8:25   ` Michael Kerrisk (man-pages)
2020-06-09 11:00     ` Jonny Grant
2020-06-09 10:18 ` Michael Kerrisk (man-pages)
2020-06-09 11:35   ` Jonny Grant

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