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From: Jakub Wilk <>
To: Jonny Grant <>
Cc: Michael Kerrisk <>, <>
Subject: Re: core(5)
Date: Sat, 6 Jun 2020 16:50:03 +0200
Message-ID: <> (raw)
In-Reply-To: <>

* Jonny Grant <>, 2020-06-06, 14:18:
>3) Could i ask to clarify my understanding. For this "The binary being 
>executed by the process does not have read
>          permission enabled."
>-- is this when the binary permissions are changed after it starts 

No, AFAICS the permission check is done when the process starts.

>4) I noticed %P always gave me P1200 even after a reboot I recall, I 
>had expected it be '1', do you see similar?

Here %P expands to the pid of the process, as expected:

   $ uname -rv
   5.6.0-2-amd64 #1 SMP Debian 5.6.14-1 (2020-05-23)

   $ sudo sysctl -w kernel.core_pattern="%P-%e-%s.core"
   kernel.core_pattern = %P-%e-%s.core

   $ ulimit -c unlimited

   $ sh -c 'kill -ABRT $$'
   Aborted (core dumped)

   $ ls *.core

Jakub Wilk

  reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-06 13:18 core(5) Jonny Grant
2020-06-06 14:50 ` Jakub Wilk [this message]
2020-06-06 15:45   ` core(5) Jonny Grant
2020-06-06 18:32     ` core(5) Jakub Wilk
2020-06-06 19:39       ` core(5) Michael Kerrisk (man-pages)
2020-06-06 21:16         ` core(5) Jonny Grant
2020-06-08 16:18           ` core(5) Michael Kerrisk (man-pages)
2020-06-08 16:06 ` core(5) Michael Kerrisk (man-pages)

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