Automatically lock current session when your Yubikey is removed (or when any other event happens).

Yubikey remove autolock session

#!/bin/bash
log="/var/log/yubilock.log"
#yubimap="/etc/sysconfig/yubikeys"
userid=`ps auxn | grep -v root | grep gnome-session | head -n 1 | awk '{print $1}'`
user=`id -nu $userid`
sessionids=`/bin/loginctl list-sessions | grep ${user} | awk '{print $1}'`

for id in $sessionids; do
	echo "$(date) [SCREENLOCK] $user $id '$0' '$1'" >> ${log}
	/bin/loginctl lock-session $id
done