23 lines
375 B
Plaintext
23 lines
375 B
Plaintext
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#!/usr/bin/env bash
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step=2
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value=`xbacklight -get`
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# double, halve value or bail
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if [ "$1" == "+" ]; then
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let value*=$step
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elif [ "$1" == "-" ]; then
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let value/=$step
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else
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echo "usage: backlight +, backlight -"
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exit 1
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fi
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# check range
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min=1
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max=100
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[[ $value -lt $min ]] && value=$min
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[[ $value -gt $max ]] && value=$max
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xbacklight -set $value -steps 10
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