I am writing a tool ( zxcV32/OpenRWC ) that fetches wallpapers from Reddit and sets them to the monitor(s) using nitrogen .
To make it easy to install and run automatically, I have created a deb package and a systemd service.
When the service is started using
sudo systemctl start openrwc@$USER.service
nitrogen
errors out with exit status 1
. (No other error message). And yes, the exec installed by the deb package works fine when manually run from the terminal.
I have compared that the command run by the tool is precisely the same when run through the systemd service or terminal run.
Sample command
nitrogen --set-scaled /home/zxcv32/.config/OpenRWC/fz41kmzk1wj91.jpg --head=0
Service
[Unit]
Description=Reddit Wallpaper Changer for GNU/Linux
Requires=display-manager.service
After=display-manager.service
StartLimitIntervalSec=0
[Service]
Type=simple
ExecStart=/usr/bin/openrwc
Restart=always
RestartSec=5
User=%i
[Install]
WantedBy=graphical.target
What may be wrong with the service? I want the service to be the user's choice, if they want to run it or not.
BTW I found this question that claims that nitrogen works through a service. (maybe there is a difference between running nitrogen directly through system service and through a go funciton)
System: Debian 11 5.10.0-17-amd64
Found the issue.
Systemd does not have access to certain environment variables.
DISPLAY
environment variable needs to be set in the openrwc@.service
.
[Service]
Environment="DISPLAY=:0"
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