Implement shutdown-if-not-in-use.

roles/lmn_kde/files/pwroff

@@ -0,0 +1,47 @@
+#!/bin/bash
+#
+# logout idle users and shutdown machine
+#
+set -eu
+
+action="systemctl poweroff"
+uptime=$(cat /proc/uptime | cut -f1 -d.)
+maxidle=3600
+
+u=($(loginctl list-users --no-legend  | sort -hr | head -1))
+una=${u[1]}
+uid=${u[0]}
+
+talk2dbus() {
+    local display=":$(ls /tmp/.X11-unix/* | sed 's#/tmp/.X11-unix/X##' | head -n 1)"
+    sudo -u $una DISPLAY=$display \
+	 DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$uid/bus "$@" 2>/dev/null
+}
+
+########
+
+## shutdown if nobody is loged in:
+if [[ -z "$una" ]] ; then
+  exec $action
+fi
+
+# FIXME: find idle time independent of running screensaver
+if ! t=$(talk2dbus qdbus org.kde.screensaver /ScreenSaver GetActiveTime) ; then
+    echo "No graphical logins found."
+else
+    idle=$(( t / 1000 ))
+    if [[ $idle -gt $maxidle ]] ; then
+        talk2dbus notify-send -i system-shutdown -u critical -a 'Important System Information' \
+	          'Please log out, the system will shut down soon!' \
+	          'There has been no activity for too long.'
+        ## shutdown:
+        #talk2dbus qdbus org.kde.ksmserver /KSMServer logout 1 2 0
+        ## logout:
+        talk2dbus qdbus org.kde.ksmserver /KSMServer logout 1 0 0
+        echo "Log-out user $una after being idle for $idle seconds."
+    else
+        echo "The user $una has been idle for $idle seconds."
+    fi
+fi
+
+#w -s | grep tty | sed "s/[[:space:]]\+/ /g" | cut -f4 -d ' '

roles/lmn_kde/files/pwroff.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=Run pwroff script
+
+[Service]
+Type=simple
+ExecStart=/usr/local/sbin/pwroff

roles/lmn_kde/files/pwroff.timer

@@ -0,0 +1,9 @@
+[Unit]
+Description=Run pwroff script every 10 min after 60 min uptime
+
+[Timer]
+OnBootSec=60min
+OnUnitActiveSec=10min
+
+[Install]
+WantedBy=timers.target

roles/lmn_kde/handlers/main.yml

@@ -7,3 +7,8 @@
     name: tmp.mount
     enabled: yes
   listen: enable tmp.mount
+
+- name: enable pwroff.timer
+  systemd:
+    name: pwroff.timer
+    enabled: true

roles/lmn_kde/tasks/main.yml

@@ -137,6 +137,23 @@
       AllowSuspendThenHibernate=no
       AllowHybridSleep=no
 
+
+- Name: Copy pwroff script
+  template:
+    src: pwroff
+    dest: /usr/local/sbin/
+    mode: 0755
+
+- name: Provide service and timer for pwroff script
+  copy:
+    src: "{{ item }}"
+    dest: "/etc/systemd/system/{{ item }}"
+    mode: 0644
+  with_items:
+    - pwroff.service
+    - pwroff.timer
+  notify: enable pwroff.timer
+
 ################# general settings ##################
 - name: Protect grub menu entries
   blockinfile: