btdaemon
A tiny program for enabling / disabling Bluetooth based on the SSID your host is connected to.
Why?
Bluetooth is susceptible to a number of security issues. To avoid those, this program only enables Bluetooth when your host is connected to a known network.
It's convenient to have Bluetooth enabled even when devices aren't connected when using devices that power down (and disconnect) while idle (like mice).
Caveats
I wrote this program for myself. Which means there's a few bits that are hardcoded:
- You must have blueutil installed.
- The
airportcommand must be present and located at/System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport. - Logs are always printed to
/var/log/net.codeviking.btdaemon/stdout.log.
Installation
Build a binary:
go build -o btdaemon ./main.go
Put it in /usr/local/bin:
sudo mv btdaemon /usr/local/bin/.
Put the plist file in /Library/LaunchAgents:
sudo cp net.codeviking.btdaemon.plist /Library/LaunchAgents
Make a directory for the daemon's logs. The permission juggling is important, as the agent runs as your user:
sudo mkdir /var/log/net.codeviking.btdaemon
sudo chown $(id -u -n):$(id -g -n) /var/log/net.codeviking.btdaemon
Create a file with a list of trusted ssids:
sudo mkdir /etc/btdaemon
sudo echo "<TrustedSSID> >> /etc/btdaemon/trust.txt
Load and start the daemon:
launchctl load net.codeviking.btdaemon.plist
See what it's doing:
tail -f /var/log/net.codeviking.btdaemon/stdout.log
To stop the daemon run:
launchctl unload net.codeviking.btdaemon.plist