systemd-ac-power
Report whether the computer is connected to an external power source. More information: https://www.freedesktop.org/software/systemd/man/systemd-ac-power.html.
- Silently check and return a 0 status code when running on AC power, and a non-zero code otherwise:
systemd-ac-power
- Additionally print
yesornotostdout:
systemd-ac-power --verbose