20 lines
479 B
Bash
20 lines
479 B
Bash
#!/usr/bin/env sh
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[ -z "$1" ] && exit 1
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if [ "$1" = "-dec" ]; then
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operator="-"
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elif [ "$1" = "-inc" ]; then
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operator="+"
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fi
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[ -z "$2" ] && exit 1
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[ "$1" != "-set" ] && result="$(printf "%b\n" "$BRIGHTNESS $operator $2" | bc -l)" \
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|| result="$2"
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[ "$(printf "%b\n" "$result > 1.0" | bc -l)" -eq 1 ] && result="1.0"
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[ "$(printf "%b\n" "$result < 0.0" | bc -l)" -eq 1 ] && result="0.0"
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xrandr --output LVDS1 --brightness "$result" && export BRIGHTNESS="$result"
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