#!/bin/sh # # Test if the computer is running on line power # Exit status: # - 0 (true) System is on AC power # - 1 (false) System is not on AC power # # NOTE: Batteries are not good indicators unless we also check their type, # as some peripherals have batteries. # # Copyright 2006 Red Hat, Inc. # Copyright 2006 Richard Hughes # # Based on work from: # Richard Hughes # Peter Jones # Stefan Seyfried # # This program is free software; you can redistribute it and/or modify # it under the terms of version 2 of the GNU General Public License as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # Check for AC/DC/etc adapters ac_adapters="$(hal-find-by-capability --capability ac_adapter)" # If there are no AC adapters, it is most likely a desktop. # Assume online, since we have no data. [ -z "$ac_adapters" ] && exit 0 # If any of them are online, then we're done. for device in $ac_adapters ; do present="$(hal-get-property --udi "$device" --key ac_adapter.present)" [ "$present" = "true" ] && exit 0 done # If there are adapters, but none are online, we're not on AC. exit 1