40 lines
666 B
Plaintext
40 lines
666 B
Plaintext
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#!/bin/sh
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# Set brightness for DDC/CI enabled monitors
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export PATH="/var/setuid-wrappers:$PATH"
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# monitor i2c device
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device=dev:/dev/i2c-0
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# brightness values
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night=35
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transition=45
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daytime=60
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deref() {
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eval "echo \$$1"
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}
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set_brightness() {
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sudo ddccontrol $device -r 0x10 -w > /dev/null $1 2>&1
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}
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fade_to() {
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current=$(sudo ddccontrol $device -r 0x10 2> /dev/null | grep -oP '\+/\K[0-9]+')
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[ $current -gt $1 ] && step=-1 || step=1
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for i in $(seq $current $step $1); do
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set_brightness $i
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sleep 1
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done
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}
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if [ $1 = "period-changed" ]; then
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if ! (lsmod | grep -q "^i2c_dev"); then
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sudo modprobe i2c-dev
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fi
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fade_to $(deref $3)
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fi
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