From MilkyWay: [root@clutterbuck ~]# ps -p 23780 -o etime ELAPSED 78-14:14:25
Hope that helps.
Thanks Alan. All of those are indeed what Stem expects. If you run the Nyx codebase instead does the uptime show up? Please note you'll need to fetch both it and stem from the git repos...
git clone https://git.torproject.org/nyx.git git clone https://git.torproject.org/stem.git