[Crash-utility] add print raw data capability for rd

[Dave Anderson]

----- Original Message -----
> 
> Thanks for detailed explaination. :)
> I made another patch to address the mentioned issues.
> 
> Thanks,
> Lei

OK Lei, I've attached what I have queued for crash-5.1.9.
I made these changes to your last patch:

- Reworded the "help rd" output.

- Created an exported set_tmpfile2() function that allows
  the caller to pass in their own FILE pointer of an open file
  that only exists during the execution of a command.  It will 
  afford the recursive-use protection of open_tmpfile2() plus
  the automatic closure of the file if the command fails prior
  to completion or if the user forgets to close it with 
  close_tmpfile2().

- Call close_tmpfile2() display_memory() after the copy is complete. 

- Passed the filename in an additional "opt" parameter to display_memory(),
  which can be used in the future for any new features that come along.

- Enforced the use of either a "count" argument or the use of 
  "-e ending-addr", since a default copy of 1 byte doesn't make
  much sense.

- Made the output loop use an fwrite() of the whole buffer instead 
  of fputc() of each byte.

Thanks,
  Dave



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