slackbuilds/system/fprintd

fprintd is a daemon that provides fingerprint scanning functionality
over D-Bus.
This is the software developers will want to integrate with to add
fingerprint authentication to OSes, desktop environments and
applications.
It also includes small command-line utilities if your desktop
environment does not integrate support.
A PAM module to implement user login (pam_fprintd) is unavailable on
Slackware since it requires systemd.