fish-shell/fish-shell — pull request #1462 by CameronNemo (2014-05-13 19:50:30+00:00)
Title: share/functions/__fish_print_service_names : Fix for systemd installed but not PID 1

We need to use the /run/systemd/system check to make sure that the system is not something like Ubuntu, where systemd and systemctl are installed but not operating as PID 1.