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file for Debian
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How users can inject their own magics for fun:

  1. open /etc/magic and /etc/magic.mime with a text editor, as root,
     and add your own magics.

  2. have fun.


How package maintainers can inject their own magics for profit:

  1. place your magics as plain text files in
     /usr/share/file/${binary_package_name}.

  2. call 'file --compile ${binary_package_name}' from /usr/share/file
     in your postinst script (maybe we should have a trigger for that
     at some point). this will produce the binary magics
     /usr/share/file/${binary_package_name}.mgc.

  3. remove the binary magics in your postrm script.

  4. profit.

 -- Daniel Baumann <mail@daniel-baumann.ch>  Sat, 27 Mar 2010 11:22:58 +0100