Those aren't used in either fprintd or BSD's login_fingerprint[1] fprintd has a version that saves to local file storage. I believe only a couple of functions to help with making the filenames/storage paths unique would be useful, either as code or documentation. [1]: http://blade2k.humppa.hu/login_fingerprint-1.2.tar.gz
commit 1f0079a274561ec30dae1a884e70236625c90f9d Author: Bastien Nocera <hadess@hadess.net> Date: Thu May 24 13:21:40 2018 +0200 data: Mark all the fp_dscv_print functions as deprecated As this is pretty much copy/pasted in fprintd, and should instead be implemented by whatever system actually stores the data, rather than in a generic but not quite "fits-all-purpose" way. https://bugs.freedesktop.org/show_bug.cgi?id=106550
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