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Manage dcc-usb-connector auto-stop on removal

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Daniele Viganò
2026-03-01 21:47:28 +01:00
parent e48b35ff4e
commit fbfd207fe8
5 changed files with 208 additions and 9 deletions
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connector/INSTALL.md
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@@ -161,6 +161,17 @@ The service (`dcc-usb-connector.service`):
2. Executes `ncat -n -k -l 2560 </dev/ttyUSB0 >/dev/ttyUSB0` to bridge serial ↔ network
3. Uses `KillMode=mixed` for proper process cleanup
4. Terminates within 5 seconds when stopped
5. **Uses `StopWhenUnneeded=yes`** - This ensures the service stops when the device is removed
### Auto-Stop Mechanism
When the USB device is unplugged:
1. **Udev detects** the removal event
2. **Systemd removes** the device dependency from the service
3. **StopWhenUnneeded=yes** tells systemd to automatically stop the service when no longer needed
4. **Service terminates** gracefully within 5 seconds
This combination ensures clean automatic stop without requiring manual intervention or custom scripts.
## Troubleshooting