28 lines
420 B
Bash
Executable File
28 lines
420 B
Bash
Executable File
#!/bin/sh
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# set backlight brightness level
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current=$(cat /sys/class/backlight/intel_backlight/brightness)
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if test -z "$1"; then
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echo "$current"
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exit 0
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fi
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case "$1" in
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'+' | '-')
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if test -z "$2"; then
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echo "missing increment"
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exit 1
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fi
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new="$((current $1 $2))"
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;;
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*)
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echo "invalid argument '$1'"
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exit 1
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;;
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esac
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echo "current: $new"
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echo "$new" > /sys/class/backlight/intel_backlight/brightness
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