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Find out the real core file

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Old 09-01-2007
Bug Find out the real core file
I understood using "file core" to find out the name of program causes the core file, like the result of "file core" command shows "core: XML", but I have no clue how to implement this in script in order to find out any core file is a real core file? not like a ASCII core file or some file else, can anyone here give me a bit clue? thanks in advance...
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LEARN ABOUT FREEBSD

gcore

GCORE(1)						    BSD General Commands Manual 						  GCORE(1)

NAME

     gcore -- get core images of running process

SYNOPSIS

     gcore [-f] [-s] [-c core] [executable] pid

DESCRIPTION

     The gcore utility creates a core image of the specified process, suitable for use with gdb(1).  By default, the core is written to the file
     ``core.<pid>''.  The process identifier, pid, must be given on the command line.

     The following options are available:

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

     -f      Dumps all available segments, excluding only malformed and undumpable segments.  Unlike the default invocation, this flag dumps map-
	     pings of devices which may invalidate the state of device transactions or trigger other unexpected behavior.  As a result, this flag
	     should only be used when the behavior of the application and any devices it has mapped is fully understood and any side effects can
	     be controlled or tolerated.

     -s      Stop the process while gathering the core image, and resume it when done.	This guarantees that the resulting core dump will be in a
	     consistent state.	The process is resumed even if it was already stopped.	The same effect can be achieved manually with kill(1).

FILES

     core.<pid> 	the core image

HISTORY

     A gcore utility appeared in 4.2BSD.

BUGS

     Because of the ptrace(2) usage gcore may not work with processes which are actively being investigated with truss(1) or gdb(1).  Addition-
     ally, interruptable sleeps may exit with EINTR.

     The gcore utility is not compatible with the original 4.2BSD version.

BSD
								   July 14, 2010							       BSD