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#!/bin/sh
# vim:noexpandtab
# Simple powersave script
#
# Copyright 2006 Red Hat, Inc.
#
# Based on work from:
# Bill Nottingham <notting@redhat.com>
# Peter Jones <pjones@redhat.com>
# David Zeuthen <davidz@redhat.com>
# Richard Hughes <richard@hughsie.com>
#
# 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
#
export STASHNAME=pm-powersave
. "@PM-UTILS-LIBDIR@/pm-functions"
remove_powersave_lock() {
release_lock "${STASHNAME}.lock"
}
help() {
cat <<EOF
$0: Valid options are:
false or ac = Tune powersaving features for the currently selected AC profile.
true or battery = Tune powersaving features for the currently selected
battery profile.
<policyname> = Immediatly switch to the passed powersave policy, but do not
change the preferred policy for the current power state.
--help = get detailed help.
--(ac|battery)-policy <policy> or --(ac|battery)policy=<policy>
set powersave for ac or battery policy to <policy>
--(ac|battery)-policy = show the current powersave policy
--list-policies = show the available powersave policies.
EOF
if [ "$1" = "--help" ]; then
cat <<EOF
The rest of this help message displays the variables
that can be used to tune the powersave hooks.
You can change these variables using pm-utils config files.
(see the pm-utils README for more information)
EOF
else
echo "You can get more detailed information by running pm-powersave --help"
fi
}
lock_and_load() {
# take the powersave lock.
# ensure it gets released no matter how we exit.
try_lock "${STASHNAME}.lock" || exit 1
trap remove_powersave_lock 0
mkdir -p "${STORAGEDIR}"
rm -f "${INHIBIT}"
load_hook_blacklist
init_logfile "${PM_LOGFILE}"
}
set_policy_vars() {
current_powersave_policy="$PM_UTILS_RUNDIR/$STASHNAME/current_$1_policy"
unset powersave_polfile
powersave_policy=default
if [ -L "$current_powersave_policy" ]; then
powersave_polfile="$(readlink -f "$current_powersave_policy")"
[ -f "$powersave_polfile" ] && {
powersave_policy="${powersave_polfile##*/}"
powersave_policy="${powersave_policy%.policy}"
}
fi
}
show_policy() { echo "$powersave_policy"; }
find_policy() {
local pol
for pol in "$PM_UTILS_ETCDIR/$STASHNAME/$1.policy" \
"$PM_UTILS_LIBDIR/$STASHNAME/$1.policy" ''; do
[ "$pol" -a -f "$pol" ] || continue
done
[ "$pol" ] && echo "$pol"
}
maybe_set_policy() {
local pol
if [ "$1" = "default" ]; then
rm -f "$current_powersave_policy"
return
elif pol="$(find_policy "$1")"; then
ln -sf "$pol" "$current_powersave_policy"
return
else
echo "Could not find policy $1, aborting."
exit 1
fi
}
load_policy() {
local p
if [ ! "$1" ]; then
[ -L "$current_powersave_policy" ] && . "$current_powersave_policy"
return 0
elif p="$(find_policy "$1")"; then
. "$p"
else
return 1
fi
}
process_policy() {
set_policy_vars "$1"
shift
case $1 in
--*=*) maybe_set_policy "${1#*=}";;
--*) if [ "$2" ]; then
maybe_set_policy "$2"
else
show_policy
fi;;
esac
}
list_policies() {
(for pol in "$PM_UTILS_ETCDIR/$STASHNAME/"*".policy" \
"$PM_UTILS_LIBDIR/$STASHNAME/"*".policy"; do
[ -f "$pol" ] || continue
pol="${pol##*/}"
pol="${pol%.policy}"
echo "$pol"
done; echo default;) |sort |uniq
}
do_battery() {
lock_and_load
set_policy_vars battery
load_policy
run_hooks power true
}
do_ac() {
lock_and_load
set_policy_vars ac
if [ "$powersave_policy" != "default" ]; then
load_policy
run_hooks power true
else
run_hooks power false
fi
}
case $1 in
true|battery) do_battery;;
false|ac) do_ac;;
--help) help && run_hooks power help;;
--ac-policy*) process_policy ac "$@";;
--batt-policy*) process_policy battery "$@";;
--list-policies) list_policies;;
default) lock_and_load
if on_ac_power; then
run_hooks power false
else
run_hooks power true
fi;;
'') if load_policy "$1"; then
lock_and_load
run_hooks power true
elif on_ac_power; then
do_ac
else
do_battery
fi;;
*) help && exit 1;;
esac
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