22 lines
380 B
Bash
Executable File
22 lines
380 B
Bash
Executable File
#!/bin/bash -e
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STEPS=16
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DIR="$(find /sys/class/backlight/* -print -quit)"
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CUR="$(cat "$DIR/brightness")"
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MAX=$(cat "$DIR/max_brightness")
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case "$1" in
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+*|-*) CUR=$(((++CUR / STEPS + $1) * STEPS)) ;;
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'') echo "$CUR"; exit ;;
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*) CUR="$1" ;;
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esac
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if [ "$CUR" -lt 0 ]; then
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CUR=0
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elif [ "$CUR" -gt "$MAX" ]; then
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CUR="$MAX"
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fi
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echo "$CUR" > "$DIR/brightness"
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