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From: Jakub Wilk <>
To: Jonny Grant <>
Cc: Michael Kerrisk <>, <>
Subject: Re: core(5)
Date: Sat, 6 Jun 2020 20:32:10 +0200
Message-ID: <> (raw)
In-Reply-To: <>

* Jonny Grant <>, 2020-06-06, 16:45:
>>>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.
>How can the process start if the binary file doesn't have read 
>permissions enabled?

It's a bit weird, but the kernel doesn't mind:

   $ cp /bin/ls .
   $ chmod a-r ls
   $ ./ls -l ls
   --wx--x--x 1 jwilk jwilk 138856 Jun  6 20:22 ls

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 ` core(5) Jakub Wilk
2020-06-06 15:45   ` core(5) Jonny Grant
2020-06-06 18:32     ` Jakub Wilk [this message]
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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