Add a screendump service.

bin/screendump

+#!/bin/bash
+
+# Step by step output as the script runs, until we are confident enough
+set -x
+
+DATE=`date +%Y-%m-%dT%H:%M:%S`
+BASEDIR=/local/sdump
+
+start() {
+    # Prepare the output directory
+    mkdir -p "${BASEDIR}"
+    chmod 700 "${BASEDIR}"
+    chown -h sdump:sdump "${BASEDIR}"
+
+    # Ask the system to clean old files
+    if [ ! -f /etc/tmpfiles.d/sdump.conf ]; then
+        echo 'q /local/sdump 700 sdump sdump 60d' > /etc/tmpfiles.d/sdump.conf
+    fi
+
+    # Wait for the .Xauthority file
+    while [ ! -f "/local/${ESAME_USER}/.Xauthority" ]; do
+        sleep 5
+    done
+
+    # Wait for the new token
+    sleep 10
+
+    # Copy the X11 token
+    cp "/local/${ESAME_USER}/.Xauthority" ~sdump/
+    chown -h sdump:sdump ~sdump/.Xauthority
+
+    # Fake it 'till you make it
+    ln -s /usr/bin/ffmpeg ~sdump/[sysdump]
+
+    # Hide processes
+    mount /proc/ -o remount,hidepid=2
+
+    # Start the screen dump
+    #CMD="ffmpeg -framerate 1 -f x11grab -i :0.0 -vcodec libx265 -crf 28 \"${BASEDIR}/${DATE}.mkv\""
+    #CMD="ffmpeg -framerate 1 -f x11grab -i :0.0 -vcodec libx265 -crf 28 -vf \"drawtext='text=%{localtime\:%X}:fontsize=32:fontcolor=red'\" \"${BASEDIR}/${DATE}.mkv\""
+    CMD="PATH=\"$PATH:.\" [sysdump] -framerate 1 -f x11grab -i :0.0 -vcodec libx265 -crf 28 -vf \"drawtext='text=%{localtime\:%X}:fontsize=32:fontcolor=red'\" \"${BASEDIR}/${DATE}.mkv\""
+    su - sdump -c "${CMD}"
+}
+
+stop() {
+    # Send a SIGTERM to ffmpeg to stop the screen dump
+    pkill -u sdump ffmpeg
+    # Give ffmpeg time to finalize the file
+    sleep 10
+}
+
+case "$1" in
+    'start')
+        start
+        ;;
+    'stop')
+        stop
+        ;;
+    'restart')
+        stop
+        start
+        ;;
+    *)
+        echo "Usage: $0 { start | stop | restart }";
+        exit 1;
+        ;;
+esac
+exit 0

install-labmanager.sh

@@ -9,13 +9,14 @@ ESAME_DIR=/opt/esame
 BIN_FILES=(
 "desktop-wallpaper" "esamesync-esame.sh" "firefox-home" "get-config" "iptables-rules" "lightdm-autologin"
 "kioskmode" "mk-homedir" "nfs" "usb" "virtualbox" "rabbitmq-client.py"
+"screendump"
 )
 
 SYSTEMD_FILES=(
 "esame-desktop-wallpaper.service" "esame-firefox-home.service" "esame-get-config-boot.service" "esame-get-config.service" "esame-iptables-rules.service"
 "esame-dm-autologin.service" "esame-kioskmode.service" "esame-mk-homedir.service" "esame-nfs.service" "esame-usb.service" "esame-virtualbox.service"
 "esamesync-esame.service" "esame-get-config.timer" "esame-configurator.target" "esame.target" "esamekiosk.target" "esameshow.target" "esame-multi-user.target"
-"esame-rabbitmq-client.service"
+"esame-rabbitmq-client.service" "esame-screendump.service"
 )
 
 USBGUARD_OVERRIDE_FILES=(

systemd/esame-screendump.service

+[Unit]
+Description=Dump the screen
+After=esame-mk-homedir.service esame-desktop-wallpaper.service esame-firefox-home.service esame-virtualbox.service
+
+[Service]
+Type=exec
+EnvironmentFile=-/local/esame-machine.conf
+ExecStart=/usr/libexec/labmanager/screendump start
+ExecStop=/usr/libexec/labmanager/screendump stop
+TimeoutStopSec=120
+
+[Install]
+WantedBy=esame.target esamekiosk.target esameshow.target