xprintidle is a utility that queries the X server for the user's idle
time and prints it to stdout (in milliseconds).

Basically, type "./configure && make && sudo make install" to compile
and install the program.  See the INSTALL file for more detailed
instructions.

You need the development files for the Xss library.  In Debian, they
are in the package 'libxss-dev' or 'xlibs-static-dev', depending on
your version.

Web page: http://www.dtek.chalmers.se/~henoch/text/xprintidle.html
E-mail: Magnus Henoch <henoch@dtek.chalmers.se>
Jabber/XMPP: legoscia@jabber.cd.chalmers.se