40 lines
686 B
Bash
Executable File
40 lines
686 B
Bash
Executable File
#!/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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