mirror of
https://github.com/SinTan1729/random.git
synced 2024-12-26 05:08:36 -06:00
67 lines
No EOL
2.6 KiB
Bash
67 lines
No EOL
2.6 KiB
Bash
#!/bin/sh
|
|
|
|
# this is a script to set my external monitor's brightness
|
|
# to high (70%) or low (40%) automatically according to day/night.
|
|
# it uses ddcutil to access the monitor's settings and sunwait to know
|
|
# if it's day or night. It expects a file in the following format in
|
|
# the .config directory (the values should be according to location)
|
|
|
|
# ~/.config/latlong.toml
|
|
# latitude="0.000000N"
|
|
# longitude="0.000000E"
|
|
# scriptdir=<location-of-this-script>
|
|
# high=70
|
|
# low=40
|
|
|
|
# just run this script one manually to set it up to run perpetually (hopefully) using 'at'
|
|
# (some distros don't come with 'at' preinstalled, so you might need to install 'at' and enable the 'atd' service.)
|
|
|
|
# it might also be a good idea to add '<location-of-this-script> scheduler' to your DE's autostart list, or to '.profile' so that it launches on system login
|
|
# (sometimes I forget to turn on the monitor when I start my PC, so this is better than having a crontab)
|
|
|
|
# location of the config file
|
|
[ -z "$XDG_CONFIG_HOME" ] && confdir="/home/sintan/.config" || confdir="$XDG_CONFIG_HOME"
|
|
|
|
# read from the config file
|
|
if test -f $confdir/latlong.toml ; then
|
|
source $confdir/latlong.toml
|
|
else
|
|
echo "No config file found!"
|
|
exit
|
|
fi
|
|
|
|
# get sun status
|
|
sun_status=$(sunwait poll $latitude $longitude)
|
|
|
|
# check if we want to access the scheduler. If yes, create a schedule using `at`
|
|
if [ "$1" == "scheduler" ]; then
|
|
# get the timings for twilight events and current time
|
|
sunrise_time=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $4}')
|
|
sunset_time=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $6}')
|
|
now_time=$(date "+%H:%M")
|
|
|
|
# try to figure out if it's twilight right now, then need to adjust sun_status
|
|
[ $sunrise_time == $now_time ] && sun_status="DAY"
|
|
[ $sunset_time == $now_time ] && sun_status="NIGHT"
|
|
|
|
# figure out the time of the next twilight
|
|
[ $sun_status == "DAY" ] && time_next=$sunset_time || time_next=$sunrise_time
|
|
|
|
# query all `at` tasks
|
|
task_list=$(atq | grep $time_next | awk '{print $1}')
|
|
|
|
# loop through all `at` entries to see if a task already exists
|
|
flag=true
|
|
for item in $task_list
|
|
do
|
|
[ "$(at -c $item | sed 'x;$!d')" == "$scriptdir/brightness-by-daylight.sh scheduler" ] && flag=false
|
|
done
|
|
|
|
# create the schedule
|
|
$flag && at -m $time_next <<< "$scriptdir/brightness-by-daylight.sh scheduler"
|
|
fi
|
|
|
|
# do the brightness adjustment using ddcutil
|
|
[ $sun_status == "DAY" ] && target=$high || target=$low
|
|
ddcutil setvcp 10 $target
|
|
echo "Monitor brightness set to $target%, since it's $(echo $sun_status | tr '[:upper:]' '[:lower:]') time" |