local/bin/lightdm-userbg

   1 #!/bin/bash
   2 
   3 busctl set-property org.freedesktop.Accounts \
   4 /org/freedesktop/Accounts/User${2:-$UID} \
   5 org.freedesktop.DisplayManager.AccountsService \
   6 BackgroundFile s "${1:-$HOME/.theme/background}"