33 lines
645 B
Bash
Executable File
33 lines
645 B
Bash
Executable File
#!/bin/bash -e
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function get_current() {
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local cur; cur="$(cat "$1/brightness")"
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local max; max="$(cat "$1/max_brightness")"
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echo "$((cur * 100 / max))"
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}
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function set_light() {
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local max; max="$(cat "$1/max_brightness")"
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echo "$((CUR * max / 100))" > "$1/brightness"
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}
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DIRS=(/sys/class/backlight/*)
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CUR="$(get_current "${DIRS[0]}")"
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case "${1:0:1}" in
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'') echo "$CUR"; exit ;;
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'+'|'-') CUR="$(($CUR + $1 - $CUR % $1 + $CUR % $1 * 10 / $1 / 5 * $1))" ;;
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*) CUR="$1" ;;
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esac
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echo "$CUR"
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[ "$CUR" -lt 0 ] && CUR=0
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[ "$CUR" -gt 100 ] && CUR=100
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for d in "${DIRS[@]}"; do
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set_light "$d"
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done
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