I wrote a PKGBUILD file for siegfried, the “signature-based file format identification tool, implementing the National Archives UK’s PRONOM file format signatures and freedesktop.org’s MIME-info file format signatures
Install it on Arch Linux with
yaourt -S siegfried
The package is called siegfried, the binary sf. After the installation run
sf -update to fetch a recent version of the signature database.
Siegfried is developed by Richard Lehane. For more info check http://www.itforarchivists.com/siegfried
Comments on AUR or via email are highly appreciated!