Internal Program Version: scanbd  1.5.1

Scanbd is a scanner button daemon. It polls the scanner buttons looking for
buttons pressed or function knob changes or other scanner events as paper
inserts / removals and at the same time allows also scan-applications to
access the scanners. If buttons are pressed, etc., various actions can be
submitted (scan, copy, email, ...) via action scripts. The function knob
values are passed to the action-scripts as well. Scan actions are also signaled
via dbus. This can be useful for foreign applications. Scans can also be
triggered via dbus from foreign applications. On platforms which support
signaling of dynamic device insertion / removal (libudev, dbus) scanbd
supports this as well. scanbd can use all sane-backends.

http://scanbd.sourceforge.net