http://tcllib.sourceforge.net/doc/fumagic.html
[[replace this comment with more details on this [tcllib] module]]
The module and its packages are a [Tcllib]'ification of [CMcC]'s [mime type recognition in pure tcl].
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[makr] (2009-11-19) notes that the manual page is currently available at: http://tcllib.sourceforge.net/doc/filetypes.html
Have a look at [tmag] for an [extension] that is using ''libmagic'' directly.
<> Package | Tcllib