41 lines
1.3 KiB
Bash
Executable file
41 lines
1.3 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Show the screen brightness value given by `xbacklight`.
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# Clicking uses `xset` to turn off the backlight, scrolling increases or decreases
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# the brightness.
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# Copyright 2019 Johannes Lange
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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STEP_SIZE=${STEP_SIZE:-5}
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USE_SUDO=${USE_SUDO:-0}
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# whether to use `sudo` for changing the brightness (requires a NOPASSWD rule)
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if [[ "$USE_SUDO" == "0" ]] ; then
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XBACKLIGHT_SET="xbacklight"
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else
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XBACKLIGHT_SET="sudo xbacklight"
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fi
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case $BLOCK_BUTTON in
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3) xset dpms force off ;; # right click
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4) $XBACKLIGHT_SET -inc "$STEP_SIZE" ;; # scroll up
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5) $XBACKLIGHT_SET -dec "$STEP_SIZE" ;; # scroll down, decrease
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esac
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BRIGHTNESS=$(xbacklight -get | cut -f1 -d'.')
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echo "${BRIGHTNESS}%"
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