8 lines
355 B
Bash
8 lines
355 B
Bash
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#!/bin/bash
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printf "%s" "${1}" | grep "^-\?[0-9.]\+$">/dev/null || exit 1
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curval="$(xrandr --verbose | grep -o "Brightness: [0-9.]\+" | grep -o "[0-9.]\+")"
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[ $(bc -l <<< "scale=1;${curval}>=0.3") -eq 1 ] &&\
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[ $(bc -l <<< "scale=1;${curval}<=2") -eq 1 ]\
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&& curval="$(bc -l <<< "scale=1;${curval}+${1}")"
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xrandr --output LVDS1 --brightness "${curval}"
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