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)