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#!/bin/bash
# What action to take on closing the laptop lid,
# depending on whether a screen is attached or not.
# This implies setting HandleLidSwitch=ignore in /etc/systemd/logind.conf
# Call this script from /etc/acpi/handler.sh (or other properly set up script
# for handling button/lid acpi event) with parameter 0 and 1 for close and open respectively
set -e -u
# Find current Xsession user through loginctl list-sessions (excluding lightdm)
# TODO: make available for desktop manager, too!
declare x_user="$(loginctl list-sessions --no-legend| sed -e 's/\s\{2,\}/ /g;s/^[[:space:]]*//' | \
cut -d ' ' -f 3| grep -v "lightdm"|uniq)"
# Fail if there is no user set
if [ -z "$x_user" ]; then
echo "error no user!"
exit 1
fi
# Export Xorg DISPLAY and XAUTHORITY
# TODO: Get number of X DISPLAY from tmp
#declare x_display="/tmp/.X11-unix/X*"
export DISPLAY=:0
export XAUTHORITY=/home/$x_user/.Xauthority
# Define the log file
declare log="/home/$x_user/.cache/$(basename $0)"
if [[ ! -w "$log" ]]; then
touch "$log"
chown ${x_user}:${x_user} "$log"
# exec > "$log" 2>&1
fi
declare -a arguments=( )
declare -a connections=( )
declare -a active_connections=( )
declare -a available_connections=( )
declare -a non_primary=( "eDP1" )
declare -a pan=( "DP2-1" "eDP1" )
declare -a pan_vertical=( 'empty' 'empty' ) # with empty placeholders!
declare internal="eDP1"
declare current_primary=""
declare action=""
# declare keywords (xrandr arguments)
declare pre_output=" --output "
declare post_auto=" --auto "
declare post_primary=" --primary "
declare post_pos_rightof=" --right-of"
declare post_pos_leftof=" --left-of"
declare post_off=" --off "
function setup_xscreen()
{
local outputs=( )
local connection_counter=0
case "$action" in
"open")
if [ ${#available_connections[@]} -gt 1 ]; then
for connection in ${pan[@]}
do
echo "$connection" >> $log
set +e
find_component_in "$connection" ${available_connections[@]}
if [ $? -eq 0 ]; then
echo "$connection is amongst the available outputs." >> $log
# adding --output argument
outputs=( ${outputs[@]:+${outputs[@]}} "$pre_output" )
# adding name of output
outputs=( ${outputs[@]:+${outputs[@]}} "$connection" )
# check whether output should not be primary in a multi output setup
find_component_in "$connection" ${non_primary[@]}
if [ $? -eq 0 ]; then
echo "$connection is setup for non-primary." >> $log
else
echo "$connection is NOT setup for non-primary." >> $log
# adding --primary argument
outputs=( ${outputs[@]:+${outputs[@]}} "$post_primary" )
fi
if [ $connection_counter -gt 0 ]; then
# adding a --right-of <connection before this one> argument
outputs=( ${outputs[@]:+${outputs[@]}} "$post_pos_rightof" "${pan[$((connection_counter-1))]}" )
fi
# adding --auto argument
outputs=( ${outputs[@]:+${outputs[@]}}"$post_auto" )
connection_counter=$(( $connection_counter + 1 ))
fi
set -e
done
fi
;;
"close")
if [ ${#available_connections[@]} -gt 1 ]; then
for connection in ${pan[@]}
do
echo "$connection" >> $log
set +e
find_component_in "$connection" ${available_connections[@]}
if [ $? -eq 0 ]; then
echo "$connection is amongst the available outputs." >> $log
# adding --output argument
outputs=( ${outputs[@]:+${outputs[@]}} "$pre_output" )
# adding name of output
outputs=( ${outputs[@]:+${outputs[@]}} "$connection" )
# if the connection is not the internal output
if [ $connection != $internal ]; then
# check whether output should not be primary in a multi output setup
find_component_in "$connection" ${non_primary[@]}
if [ $? -eq 0 ]; then
echo "$connection is setup for non-primary." >> $log
else
echo "$connection is NOT setup for non-primary." >> $log
# adding --primary argument
outputs=( ${outputs[@]:+${outputs[@]}} "$post_primary" )
fi
if [ $connection_counter -gt 0 ]; then
# adding a --right-of <connection before this one> argument
outputs=( ${outputs[@]:+${outputs[@]}} "$post_pos_rightof" "${pan[$((connection_counter-1))]}" )
fi
# adding --auto argument
outputs=( ${outputs[@]:+${outputs[@]}}"$post_auto" )
connection_counter=$(( $connection_counter + 1 ))
else
# adding a --off argument for the interal screen
outputs=( ${outputs[@]:+${outputs[@]}} "$post_off" )
fi
fi
set -e
done
fi
;;
esac
echo "Calling: xrandr ${outputs[@]}" >> $log
xrandr ${outputs[@]}
}
function find_component_in()
{
local -r component=$1
shift
local value
for value in "$@"
do
[[ $value == "$component" ]] && return 0
done
return 1
}
function get_current_x_information()
{
# get current xrandr settings
current_xrandr=$(xrandr)
# get current primary output from xrandr
current_primary=$(echo "$current_xrandr" | \
grep -wE '(\bconnected.*primary.*[0-9]{1,5}\x[0-9]{1,5}\+[0-9]{1,5}\+[0-9]{1,5})' | \
cut -d ' ' -f 1)
echo "Current primary output: $current_primary" >> $log
# get all current active connections
active_connections=( "${active_connections[@]:+${active_connections[@]}}" $(echo "$current_xrandr" | \
grep -wE '(\bconnected.*[0-9]{1,5}\x[0-9]{1,5}\+[0-9]{1,5}\+[0-9]{1,5})' | cut -d ' ' -f 1) )
echo "Current active connections: ${active_connections[@]}" >> $log
# get all currently available connections
available_connections=( "${available_connections[@]:+${available_connections[@]}}" $(echo "$current_xrandr" | \
grep -wE '(\bconnected.*)' | cut -d ' ' -f 1) )
echo "Currently available connections: ${available_connections[@]}" >> $log
# get all available connections
connections=( "${connections[@]:+${connections[@]}}" $(echo "$current_xrandr"| grep -v 'Screen' | cut -d ' ' -f 1))
echo "All current connections: ${connections[@]}" >> $log
}
function get_action()
{
arguments=( "${arguments[@]:+${arguments[@]}}" "${@:+$@}" )
# echo "${@:+$@}" >> $log
# echo "${arguments[@]:+${arguments[@]}}" >> $log
if [ ${#arguments[@]} -gt 0 ];then
if [ "${arguments[0]}" = "button/lid" ]; then
case "${arguments[2]}" in
"open")
action="open"
;;
"close")
action="close"
;;
esac
elif [ "${arguments[0]}" = "login" ]; then
action="open"
fi
fi
echo "Action set: $action" >> $log
}
# pass arguments to the script to the get_action function
get_action "${@:+$@}"
get_current_x_information
setup_xscreen
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