fix barrier ssh connection

templates/barrier/barrier-ssh-connection@.service.j2

@@ -10,7 +10,7 @@ ExecStart=sh -c "sleep infinity | ssh $@" ssh -R 24800:localhost:24800 %i\
 systemctl --user stop lockscreen.service;\
 systemctl --user start barrierc@localhost.service;\
 systemd-run --user -u lockscreen-barrier-unlock sh -c "\"cat < lock > /dev/null; systemctl --user start lockscreen.service; systemctl --user stop barrierc@localhost.service;\"";\
-exec > lock
+exec cat > lock
 
 [Install]
 WantedBy=graphical-session.target