finding mimetype of file

[Jani Monoses]

Hello

is there a recommended way of finding out the mimetype of a file when
writing xfce apps? I see thunar has it's own lib, exo used xdgmime but
dropped it probably since now thunar's is better, there are mime related
functions in libxfcegui4 and xffm too. And then there's libmagic and
again an xdgmime tree inside the gtk2 sources but which don't seem to be
entirely exported.

thanks
Jani