One Last Question about Core Files (distinguish) URGENT Post: 34326

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Top Forums Shell Programming and Scripting One Last Question about Core Files (distinguish) URGENT Post 34326 by Perderabo on Sunday 16th of February 2003 09:58:51 PM

02-16-2003

Administrator Emeritus

core file --- a file written by the kernel when it is terminating a process as a result of the default action of certain singals. Which signals varies from system to system. A typical list might be SIGABRT, SIGFPE, SIGILL, SIGQUIT, SIGSEGV, and SIGBUS.

With most versions of UNIX, yes they start out with a name of core. But some versions of UNIX give you control over the name. Recent SunOS versions have a coreadm command that can do this.

And you can always do something like "mv core perl.core".

I certainly would not assume that a file with "core" somewhere in the name must be a core file. To be sure, you need to inspect the contents somehow. In previous posts people have described tools like: "file", and "adb". Did you find any that work on your system? Try it against these candidates.

But bear in mind that if someone did do "mv core perl.core", it may that they want that file.

Perderabo

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LEARN ABOUT BSD

gcore

GCORE(1)						      General Commands Manual							  GCORE(1)

NAME

       gcore - get core image of running process

SYNOPSIS

       gcore [-s][-c core] pid

DESCRIPTION

       gcore  creates  a  core	image  of  each specified process, suitable for use with adb(1).  By default the core image is written to the file
       <pid>.core.

       The options are:

       -c     Write the core file to the specified file instead of <pid>.core.

       -s     Stop the process while creating the core image and resume it when done.  This makes sure that the core dump will be in a	consistent
	      state.   The  process is resumed even if it was already stopped.	Of course, you can obtain the same result by manually stopping the
	      process with kill(1).

       The core image name was changed from core.<pid> to <pid>.core to prevent matching names like core.h and core.c when using programs such	as
       find(1).

FILES

       <process-id>.core   The core image.

BUGS

       If gcore encounters an error while creating the core image and the -s option was used the process will remain stopped.

       Swapped out processes and system processes (the swapper) may not be gcore'd.

4.2 Berkeley Distribution					  April 15, 1994							  GCORE(1)

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