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Enable your Linux Machine to show login (SDDM) with Aerial Theme when motion is detected

#linux #tutorial

Summary

  • I have a spare iMac 2012 and it has been working with Debian in external SDD because the internal hard drive stopped working with recent MacOS.

  • The iMac acts as server and it is facing to the bathroom. Now, when I am in the bathroom, I cannot check the time unless I bring a mobile device.

  • So I decided to make the server show the time with some nice things when I am in the bathroom. And to make the project bit challenging, I also decied to turn on the monitor only if I went to the bathroom so that it is usually turned off.

  • This could be done in a different way as you make the server autologin at first, but I just decided to do in this way for now.

Notice

Since this is for Linux environment, you would need to spend your own time to investigate to make the follwoings work for your situation, but it would work regadless if you can apply the steps fundamentally.

Steps

Install Programs 

mkdir -p /usr/local/src/3ximus/aerial-sddm-theme cd /usr/local/src/3ximus/aerial-sddm-theme git clone https://github.com/3ximus/aerial-sddm-theme.git . cd /usr/share/sddm/themes ln -s /usr/local/src/3ximus/aerial-sddm-theme aptitude install motion unclutter-xfixes
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  • Open the setting Login Screen (SDDM) in KDE Plasma

  • Select Aerial HD Video

Amend Files 

/etc/motion/motion.conf ========== # I guess I did not have to do this, but just in case target_dir /dev/null movie_output off webcontrol_port 0 webcontrol_localhost on # Reduce CPU Usage width 640 height 480 # # Turn on monitor when someone passed by # # Execute your own script so that you do not need # to restart SDDM during the investigation in case # you need to do that for your environment: # # - This way avoids you to have to "service sddm restart" # and then wait until your monitor gets turned off # # - The last "logger" sends the output from # "poke-monitor" to "/var/log/messages" # so that you can debug easier # on_motion_detected '/usr/local/bin/poke-monitor 2>&1 | logger'
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/usr/share/sddm/scripts/Xsetup ======== # Hide mouse cursor /usr/bin/unclutter -idle 1 -root & # Remove lock file if exists # Refer the comment for "/usr/local/bin/poke-monitor" # for more details lockfile=/var/lock/poke-monitor if [ -f "$lockfile" ]; then rm -f $lockfile fi # Kill the script in case it is running/waiting killall poke-monitor # Disable systemd service for motion if running # (It does not work otherwise) isMotionServiceRunning=$(systemctl status motion.service | egrep "Active.+running") if [ -n "$isMotionServiceRunning" ]; then systemctl stop motion.service systemctl disable motion.service fi # Run motion /usr/bin/motion &
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/usr/local/bin/poke-monitor ======== #!/bin/bash # You may need to amend this file to suit to your environment # For example, I use KDE Plasma and how this script checks # if GUI is used, relies on that situation # This event occurs a lot so it tries to avoid processing # while it is processing by using the lock file lockfile=/var/lock/poke-monitor if [ -f "$lockfile" ]; then exit fi finish () { sleep 60 rm -f $lockfile } touch $lockfile sync; sync # Not to process if someone is using GUI loggedin=`w | egrep "tty.+startplasma"` if [ -n "$loggedin" ]; then echo "GUI is used" finish exit fi echo "Turning on monitor" # This shows the screen having some output from kernel # kill -TERM `pidof sddm` &> /dev/null xset dpms force off sleep 1 xset dpms force on # Avoid processing within the next short period of time # because the monitor would be still turned on finish
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Optional - Increase the font size of clock etc 

cd /usr/local/src/3ximus/aerial-sddm-theme git checkout -b custom cp /usr/lib/x86_64-linux-gnu/qt5/qml/SddmComponents/Clock.qml components/CustomClock.qml # # Muck around these files # # - /usr/local/src/3ximus/aerial-sddm-theme/theme.conf # # - /usr/local/src/3ximus/aerial-sddm-theme/components/CustomClock.qml # # - /usr/local/src/3ximus/aerial-sddm-theme/Main.qml
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Things I did not have to apply

  • During the investigation I found these things.

  • Leaving the notes in case I need to refer for something else to do.

Allow the user motion to restart SDDM 

/etc/sudoers.d/sddm-sudoers ========== Cmnd_Alias RESTARTSERVER_SDDM = /usr/bin/systemctl restart sddm.service motion ALL=(ALL) NOPASSWD: RESTARTSERVER_SDDM Defaults!RESTARTSERVER_SDDM !requiretty
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Make Motion to restart SDDM in Daemon Mode 

/etc/default/motion ========== start_motion_daemon=yes
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/etc/motion/motion.conf ========== daemon on on_motion_detected 'sudo systemctl restart sddm.service'
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References

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