systemd-ac-power

Check AC power connection status

TLDR

Check AC power status

$ systemd-ac-power

Check with verbose output

$ systemd-ac-power -v

systemd-ac-power reports whether the computer is connected to an external power source (AC mains). It returns exit code 0 when on AC power and non-zero when on battery.This is useful in scripts and systemd unit conditions to change behavior based on power state.

PARAMETERS

-v, --verbose

Print "yes" or "no" to stdout in addition to exit code

-h, --help

Display help

EXIT STATUS

0 - Running on AC powernon-zero - Running on battery or unable to determine

INSTALL

sudo apt install systemd

sudo dnf install systemd

sudo pacman -S systemd

sudo zypper install systemd

brew install systemd

nix profile install nixpkgs#systemd

CAVEATS

Requires proper power supply detection by the kernel. Some desktop systems without batteries always report AC power. Virtual machines may report power state incorrectly.

HISTORY

systemd-ac-power provides a simple, scriptable interface to power supply status, enabling power-aware behavior in systemd units and shell scripts.