ON_AC_POWER(1)                                       General Commands Manual                                       ON_AC_POWER(1)

NAME
       on_ac_power - test whether computer is running on AC power

SYNOPSIS
       on_ac_power

DESCRIPTION
       on_ac_power  checks whether the system is running on abundant power (such as AC mains, an USB charger, etc), as opposed to
       battery power.

OPTIONS
       None.

EXIT STATUS
       0 (true)  System is on mains power
       1 (false) System is not on mains power
       255 (false)    Power status could not be determined

CAVEATS
       The vast majority of desktops and servers have no power sensors, thus they return 255 "unknown"; for most  purposes  you'd
       want to consider this answer to imply mains power — note that 255 evaluates as false for the shell.

       This  program  currently  provides only information known to the kernel; it doesn't (yet?) query userspace daemons such as
       nut which may provide further information.

AUTHOR
       This manual page was written by Steve Dodd <steved@loth.demon.co.uk>, was updated by Thomas Hood then by Adam Borowski.

                                                          12 March 2018                                            ON_AC_POWER(1)