24 lines
650 B
Bash
Executable File
24 lines
650 B
Bash
Executable File
#!/bin/bash
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max_brightness=$(cat /sys/class/backlight/intel_backlight/max_brightness)
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brightness=$(cat /sys/class/backlight/intel_backlight/brightness)
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step=$(( max_brightness / 8 ))
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inc=2
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low_delta=$(( brightness - step ))
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high_delta=$(( brightness + step ))
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if { [ "$1" = "down" ] && [ $low_delta -ge $step ]; } || { [ "$1" = "up" ] && [ $high_delta -le "$max_brightness" ]; }
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then
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for i in $(seq $step); do
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case $1 in
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'up')
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brightnessctl s +$inc 1> /dev/null
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;;
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'down')
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brightnessctl s $inc- 1> /dev/null
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;;
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esac
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done
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else
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echo "Brightness too high or low"
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fi
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