Systemd-test

This project was created to illustrate how to create a System.d daemon in Python that utilizes DBus for IPC/RPC by receiving messages from another System.d service and creating signals other DBus-aware software can listen for.

---

Installation instructions:

• After changing to your selected directory on your machine:

git clone https://github.com/rbasn-us/systemd-test.git systemd-test
sudo pip install pydbus, csystemd
cd systemd-test/venv/systemd-test

• Make the systemd scripts being called executable:

chmod +x systemd_daemon.py
chmod +x systemd_test.py

• Modify the two .service files to point to your installation directory:

systemd_daemon.service:

ExecStart=/CHANGE/TO/YOUR/INSTALL/DIRECTORY/systemd-test/venv/systemd-test/systemd_daemon.py start
ExecStop=/CHANGE/TO/YOUR/INSTALL/DIRECTORY/systemd-test/venv/systemd-test/systemd_daemon.py stop

systemd_test.service:

ExecStart=/CHANGE/TO/YOUR/INSTALL/DIRECTORY/systemd-test/venv/systemd-test/systemd_test.py start
ExecStop=/CHANGE/TO/YOUR/INSTALL/DIRECTORY/systemd-test/venv/systemd-test/systemd_test.py stop

• Move the files around to where they need to go:

mv systemd_daemon.service /etc/systemd/system/
mv systemd_test.service /etc/systemd/system/
mv us.rbasn.systemd.test.conf /etc/dbus-1/system.d/

• Reload systemd and start the services:

sudo systemctl daemon-reload
sudo systemctl start systemd_daemon
sudo systemctl start systemd_test

• And finally, run the signal listener to output to the command line when signals are being fired by the daemon:

python signal_listening.py