76 lines
1.6 KiB
Bash
Executable file
76 lines
1.6 KiB
Bash
Executable file
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (C) 2020-present Fewtarius
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## Load minimal distribution settings to improve
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## performance.
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. /etc/profile.d/02-distribution
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BRIGHTNESS_DEV="$(find /sys/class/backlight/*/ -name brightness -print -quit)"
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BRIGHTNESS_PATH="${BRIGHTNESS_DEV%/brightness}"
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MIN=0
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MAX=$(<$(find /sys/class/backlight/*/ -name max_brightness -print -quit))
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STEP="$(echo "scale=1; (${MAX} / 10)" | bc)"
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if [ ! -f "${BRIGHTNESS_DEV}" ]
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then
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echo "ERROR: There is no BRIGHTNESS object to manage."
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exit 1
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fi
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getBrightness() {
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echo $(<${BRIGHTNESS_DEV})
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}
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setBrightness() {
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echo "${1}" > ${BRIGHTNESS_DEV}
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set_setting system.brightness "${2}"
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}
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stepUp() {
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CURRENT=$(get_setting system.brightness)
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NEXT=$(( ${CURRENT} + 1 ))
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if (( ${NEXT} > 10 ))
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then
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NEXT=10
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fi
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BRIGHTNESS=$(printf '%.0f' "$(echo "scale=1; ${STEP} * ${NEXT}" | bc)")
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setBrightness ${BRIGHTNESS} ${NEXT}
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}
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stepDown() {
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CURRENT=$(get_setting system.brightness)
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NEXT=$(( ${CURRENT} - 1 ))
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if (( ${NEXT} < 0 ))
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then
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NEXT=0
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fi
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BRIGHTNESS=$(printf '%.0f' "$(echo "scale=1; ${STEP} * ${NEXT}" | bc)")
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setBrightness ${BRIGHTNESS} ${NEXT}
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}
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case ${1} in
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"up")
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stepUp
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;;
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"down")
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stepDown
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;;
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"device")
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echo ${BRIGHTNESS_DEV}
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;;
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"path")
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echo ${BRIGHTNESS_PATH}
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;;
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"set")
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setBrightness "$(printf '%.0f' "$(echo "scale=1; ${STEP} * ${2}" | bc)")" ${2}
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;;
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*)
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echo $(getBrightness)
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;;
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esac
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