Add systemd service support

Author: diffstorm

README.md

@@ -354,6 +354,44 @@ To build the project with CMake, you need to have CMake and GTest installed.
     ./test/unit_tests
     ```
 
+## Systemd Service Installation (optional)
+
+For production deployment on systemd-based Linux systems, you can install processWatchdog as a system service:
+
+1. **Build and install the binary:**
+   ```bash
+   make BUILD_TYPE=release
+   sudo cp processWatchdog /usr/local/bin/
+   sudo chmod +x /usr/local/bin/processWatchdog
+   ```
+
+2. **Create configuration directory:**
+   ```bash
+   sudo mkdir -p /etc/processwatchdog
+   sudo mkdir -p /var/lib/processwatchdog
+   sudo cp config.ini /etc/processwatchdog/
+   ```
+
+3. **Install the service file:**
+   ```bash
+   sudo cp processwatchdog.service /etc/systemd/system/
+   sudo systemctl daemon-reload
+   ```
+
+4. **Enable and start the service:**
+   ```bash
+   sudo systemctl enable processwatchdog
+   sudo systemctl start processwatchdog
+   ```
+
+5. **Check service status:**
+   ```bash
+   sudo systemctl status processwatchdog
+   sudo journalctl -u processwatchdog -f  # Follow logs
+   ```
+
+**Note:** Edit `/etc/processwatchdog/config.ini` and adjust paths in `processwatchdog.service` as needed for your setup.
+
 ## Running the Application
 Use the provided `run.sh` script to start the Process Watchdog application. This script includes a mechanism to restart the watchdog itself if it crashes, providing an additional level of protection.
 

processwatchdog.service

@@ -0,0 +1,35 @@
+[Unit]
+Description=Process Watchdog - Monitor and restart applications
+Documentation=https://github.com/diffstorm/processWatchdog
+After=network.target
+Wants=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/processWatchdog -i /etc/processwatchdog/config.ini
+ExecReload=/bin/kill -SIGUSR1 $MAINPID
+Restart=on-failure
+RestartSec=5
+TimeoutStopSec=30
+
+# Security settings
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectSystem=strict
+ProtectHome=true
+ReadWritePaths=/var/log /var/run /tmp
+
+# User and group (uncomment and adjust as needed)
+# User=processwatchdog
+# Group=processwatchdog
+
+# Working directory
+WorkingDirectory=/var/lib/processwatchdog
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=processwatchdog
+
+[Install]
+WantedBy=multi-user.target