Fix the screendump service.

Going back to the configuration of my first tests.

I suppose the sdump user must be below 1000, so that systemd will not
launch a full user session for us (with pulse & friends).

As I'm hiding the PIDs, I don't need to run the ffmpeg process with
a different name. I'm not sure if pkill was able to find the process
with the changed name, so we go back to a simpler script.

And it works!

bin/screendump

@@ -30,21 +30,26 @@ start() {
     chown -h sdump:sdump ~sdump/.Xauthority
 
     # Fake it 'till you make it
-    ln -s /usr/bin/ffmpeg ~sdump/[sysdump]
+    #if [ ! -e "~sdump/[sysdump]" ]; then
+    #    ln -s /usr/bin/ffmpeg ~sdump/[sysdump]
+    #fi
 
     # 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}/${DATE}.mkv\""
+    CMD="ffmpeg -framerate 1 -f x11grab -i :0.0 -vcodec libx265 -crf 28 -vf \"drawtext='text=%{localtime\:%X}:fontsize=32:fontcolor=red'\" \"${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 (running as "[sysdump]") to stop the screen dump
-    pkill -u sdump "[sysdump]"
+    #pkill -u sdump "[sysdump]"
+    FFPID=`pgrep -u sdump ffmpeg`
+    echo "Found sdump process with PID: ${FFPID}"
+    pkill -u sdump ffmpeg
     # Give ffmpeg time to finalize the file
     sleep 10
 }

install-labmanager.sh

@@ -152,7 +152,7 @@ myuseradd esamesync 451 451
 myuseradd esame
 myuseradd moodle
 myuseradd rdesktop
-myuseradd sdump
+myuseradd sdump 945 945
 chown esamesync:esamesync ${ESAME_DIR}
 
 mkdir -p /usr/libexec/labmanager