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Re: getting a regular user to dump core when a program crashes

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On 2022-02-28 at 11:35, Greg Wooledge wrote:

> On Mon, Feb 28, 2022 at 11:25:13AM -0500, songbird wrote:
>
>> >> me@ant(14)~$ ulimit -a
>> >> real-time non-blocking time  (microseconds, -R) unlimited
>> >> core file size              (blocks, -c) unlimited
>> 
>>   i had accomplished the ulimit change already, but the lack of 
>> the proper permission on the output directory meant that a core
>> file would not be generated.
> 
> What is an "output directory"?  Core files are dumped in the process's
> *working* directory, which is "where you are when you run it".

By default, yes, that's the case. However, from songbird's original
post:

>>>> i have the following set in my /etc/sysctl.conf:
>>>> 
>>>> # core file location and file name format
>>>> kernel.core_pattern=/crash/core.%u.%E.%p

That appears to be a kernel parameter which defines the path and
filename of the core file.

I imagine that this was set in order to be able to specify a filename
other than the default, with relevant information about the dumping
process (and avoiding the problem of multiple such files overwriting one
another), and that the syntax of the kernel parameter in question is
such that you have to specify the full path to the file.

-- 
   The Wanderer

The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man.         -- George Bernard Shaw

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Thread

getting a regular user to dump core when a program crashes songbird <songbird@anthive.com> - 2022-02-28 16:10 +0100
  Re: getting a regular user to dump core when a program crashes Greg Wooledge <greg@wooledge.org> - 2022-02-28 16:40 +0100
    Re: getting a regular user to dump core when a program crashes songbird <songbird@anthive.com> - 2022-02-28 17:30 +0100
      Re: getting a regular user to dump core when a program crashes Greg Wooledge <greg@wooledge.org> - 2022-02-28 17:40 +0100
        Re: getting a regular user to dump core when a program crashes The Wanderer <wanderer@fastmail.fm> - 2022-02-28 17:50 +0100
          Re: getting a regular user to dump core when a program crashes songbird <songbird@anthive.com> - 2022-02-28 18:00 +0100
          Re: getting a regular user to dump core when a program crashes Reco <recoverym4n@enotuniq.net> - 2022-02-28 18:20 +0100
          Re: getting a regular user to dump core when a program crashes Greg Wooledge <greg@wooledge.org> - 2022-02-28 18:30 +0100
            Re: getting a regular user to dump core when a program crashes songbird <songbird@anthive.com> - 2022-02-28 19:50 +0100

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