pause on metered wifi on linux

Support
1

Hi, has anyone got a working solution for how to pause Syncthing when switching to a metered wifi on Linux? I think I could run something like systemd-metered-connection-dependency/check-metered-connection.sh at master · jdorel/systemd-metered-connection-dependency · GitHub in a loop and turn off/on syncthing based on the exit code but maybe someone has other, possibly better, solutions? (It would be neat if syncthing itself could check metered-status, like what Gnome Software does, though it’s understandable if devs don’t want to add the complexity.)

2

Current solution:

    ==> /usr/local/bin/syncthing-respect-wifi-metering <==
    #!/usr/bin/bash
    
    while true; do 
    	if wifi-is-unmetered; then 
    		systemctl start syncthing@me.service syncthing@other.service
    	else 
    		systemctl stop syncthing@me.service syncthing@other.service 
    	fi
    	sleep 5
    done
    
    
    ==> /usr/local/bin/wifi-is-unmetered <==
    #!/usr/bin/bash
    
    metered_status=$(dbus-send --system --print-reply=literal \
    	--system --dest=org.freedesktop.NetworkManager \
              /org/freedesktop/NetworkManager \
              org.freedesktop.DBus.Properties.Get \
              string:org.freedesktop.NetworkManager string:Metered \
              | grep -o '.$')
    
    if [[ $metered_status =~ (1|3) ]]; then
      [[ $1 = -v ]] && echo Current connection is metered >&2
      exit 1
    else 
      [[ $1 = -v ]] && echo Current connection is unmetered >&2
      exit 0
    fi

(I guess an alternative to stop/start would be to sudo -u other syncthingcli pause --all-dirs )

3

https://github.com/martchus/syncthingtray has this functionality.