On Fri, May 20, 2016 at 07:53:22AM -0700, Scott Rohling wrote:
> My point was that what you see in Linux and CMS are not two different
> things..   a Linux 'cat' and CMS 'TYPE' are pretty equivalent -- and a
> packed file looks garbled using either one.
>
> I think Neale had a good idea in making the Linux 'file' command recognize
> this particular signature so at least Linux knows it is packed and not text
> format - just as it knows about tar, gzip, etc even without a particular
> filetype in the name.

To recognize the file format the "magic" patterns are used.  See also the
definitions in /usr/share/misc/magic and magic(5) man page.  If you know
how to detect packed CMS files, you can add the signature there (or for
testing locally) and check if file is then able to recognize it.

Kind regards,
  Hendrik

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