function __fish_print_service_names -d 'All services known to the system'
    if test -d /run/systemd/system # Systemd systems
		# For the `service` command, this needs to be without the type suffix
		# on Debian at least
		__fish_systemctl_services | string replace -r '.service$' ''
    else if type -f rc-service ^/dev/null # OpenRC (Gentoo)
        command rc-service -l
    else if test -d /etc/init.d # SysV on Debian and other linuxen
		string replace '/etc/init.d/' '' -- /etc/init.d/*
	else # Freebsd
		command service -l
    end
end