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@@ -1,13 +1,12 @@
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#!/bin/bash
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-hostname=`hostname`
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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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+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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+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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@@ -20,5 +19,5 @@ then
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esac
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done
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else
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- echo 'Brightness too high. Use `off` parameter to turn backlight off'
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+ echo "Brightness too high or low"
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fi
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