Re: core man page %e

["Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>]

Hello Jonny,

On 5/30/20 12:39 PM, 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

I changed it to this:

           %e  The process or thread's comm value, which typically is the
               same  as the executable filename (without path prefix, and
               truncated to a maximum of 15  characters),  but  may  have
               been  modified  to be something different; see the discus‐
               sion of /proc/[pid]/comm  and  /proc/[pid]/task/[tid]/comm
               in proc(5).

Thanks,

Michael

-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/