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In the verify-match case, this means disconnecting from the bus rather than stopping the verification. This is the only way to make sure that the result is immediately reported and we do not wait for the device to be idle again (which generally means waiting for finger removal). In the verify-no-match case we simply send the string first before the operation is stopped. An exceeded retry limit is only reported after VerifyStop has finished.
fprintd ======= https://fprint.freedesktop.org/ Daemon to offer libfprint functionality over D-Bus Might eat your kangaroo. Written in C. Licensed under the GPL version 2 or any later version (see COPYING). A PAM login module is included in the 'pam' directory. Translating =========== fprintd and pam_fprintd are translated using weblate. Please visit https://translate.fedoraproject.org/projects/fprintd/ to contribute translations. API use cases ============= - User wants to use the fingerprint reader, and enroll his fingerprints, or remove some fingerprints from the database - Administrator wants to enroll fingerprints for a particular user, or remove fingerprints for a particular user - Laptop/desktop authentication: * Check for fingerprint devices * Check whether a particular user has any fingerprints enrolled * Verify a fingerprint for a particular user, or, if the device supports it, verify that the fingerprint matches against any of the fingerprints enrolled - Point Of Sale authentication (in a bar, the fingerprint reader is used to see who accesses a particular point of sale/till, in place of PIN code authentication and/or tokens) * Given a list of users, verify which one has scanned their finger Debugging ========= To enable debug output run `systemctl edit fprintd.service` then enter: ``` [Service] Environment=G_MESSAGES_DEBUG=all ``` Save the result and restart fprintd using `systemctl restart fprintd.service`. After that, you can grab the logs using `journalctl -u fprintd.service`.