DietPi-Software | rTorrent: ruTorrent web UI cannot connect to rTorrent daemon

[MichaIng]

Ref: https://dietpi.com/phpbb/viewtopic.php?f=11&t=5656
Verified on VM:

[10.03.2019 18:59:09] WebUI started.
[10.03.2019 18:59:09] No connection to rTorrent. Check if it is really running. Check $scgi_port and $scgi_host settings in config.php and scgi_port in rTorrent configuration file.

[MichaIng]

Identified the issue:

• /root/.rtorrent.rc is not used as config file anymore by the systemd unit. There must have been something changed in systemd about which default HOME dir is used when executing as root.
• Adding -o scgi_port=127.0.0.1:5000 to the command directly works, however we have a bunch of settings we want to set, so require a config file.
• Overriding the HOME dir via systemd unit for sure works as well. We currently set WorkingDirectory=%h which obviously means user home. WorkingDirectory="~" is the current docs about that but does not work as well. Environment=HOME=/root or such would work.
• However we should take this as chance to switch rTorrent to use it's own user as well.
• Quick test with useradd -rm -s $(which nologin) -G dietpi -d /mnt/dietpi_userdata/rtorrent rtorrent works well. Then move .rtorrent.rc inside and no WorkingDirectory directive is required at all.
• This aligns rTorrent to with the other torrent downloaders which as well run as their own user instead of root.

[MichaIng]

Fixed with: 16d37ea