mirror of
https://github.com/SinTan1729/random.git
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63 lines
No EOL
2.3 KiB
Bash
63 lines
No EOL
2.3 KiB
Bash
#!/bin/sh
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# This is a script to set my external monitor's brightness
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# to high (70%) or low (40%) automatically according to day/night.
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# It uses ddcutil to access the monitor's settings and sunwait to know
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# if it's day or night. It expects a file in the following format in
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# the .config directory (the values should be according to location)
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# ~/.config/latlong.toml
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# latitude="0.000000N"
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# longitude="0.000000E"
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# scriptdir=<location-of-this-script>
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# high=70
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# low=40
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# Just run this script one manually to set it up to run perpetually (hopefully) using 'at'
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# (Some distros don't come with 'at' preinstalled, so you might need to install 'at' and enable the 'atd' service.)
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# 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
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# (Sometimes I forget to turn on the monitor when I start my PC, so this is better than having a crontab)
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confdir="/home/sintan/.config"
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if test -f $confdir/latlong.toml ; then
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source $confdir/latlong.toml
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else
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echo "No location config found!"
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exit
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fi
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sun_status=$(sunwait poll $latitude $longitude)
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if [ $sun_status == "DAY" ]; then
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target=$high
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else
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target=$low
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fi
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ddcutil setvcp 10 $target
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echo "Monitor brightness set to $target%, since it's $(echo $sun_status | tr '[:upper:]' '[:lower:]') time"
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# Check if we want to access the scheduler. If yes, create a schedule using `at`
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if [ "$1" == "scheduler" ]; then
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if [ $sun_status == "DAY" ]; then
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time_next=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $6}')
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else
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time_next=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $4}')
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fi
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task_list=$(atq | grep $time_next | awk '{print $1}')
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for item in $task_list
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do
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if ! [ $(at -c $item | sed 'x;$!d' | awk '{print $4}') == "$scriptdir/brightness-by-daylight.sh" ]; then
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# we wait a minute so that the next schedule is set up properly (or sunwait reports day/night in a misleading way)
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at -m $time_next <<< "sleep 60 && $scriptdir/brightness-by-daylight.sh scheduler"
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fi
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done
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if [ -z "$task_list" ]; then # in case there's no at entry
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at -m $time_next <<< "sleep 60 && $scriptdir/brightness-by-daylight.sh scheduler"
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fi
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fi |