gcore man page on 4.4BSD

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

     gcore — get core images of running process

     gcore [-s] [-c core] exec pid

     Gcore 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>”.
     Both the executable image, exec, and the process identifier, pid, must be
     given on the command line.

     The options are:

     -c	     Write the core file to the specified file instead of

     -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

     core.<pid>		The core image.

     Gcore appeared in 4.2BSD.

     Context switches or paging activity that occur while gcore is running may
     cause the program to become confused.  For best results, use -s to tempo‐
     rarily stop the target process.

     Gcore is not compatible with the original 4.2BSD version.	In particular,
     4.4BSD requires the exec argument.

4.2 Berkeley Distribution     September 19, 2021     4.2 Berkeley Distribution

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