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#!/bin/bash
DDC_UTIL=$(which ddcutil)
STEP="10"
FUNCTION="$DDC_UTIL setvcp 10"
PROG_NAME="$(basename $0)"
usage() {
printf "Usage: %s (-d | --decrease=NUM | -i | --increase=NUM)\n" $PROG_NAME > /dev/stderr
}
while [[ $# -gt 0 ]]; do
case $1 in
-d)
FUNCTION="$FUNCTION -"
;;
-i)
FUNCTION="$FUNCTION +"
;;
--decrease=*)
FUNCTION="$FUNCTION -"
STEP=$(echo $1 | sed "s/--decrease=//g")
;;
--increase=*)
FUNCTION="$FUNCTION +"
STEP=$(echo $1 | sed "s/--increase=//g")
;;
--help)
usage
exit 1
;;
*)
printf "Error: Unknown Flag '%s'.\n" $1 > /dev/stderr
usage
exit 1
;;
esac
shift
done
FUNCTION="$FUNCTION $STEP"
$FUNCTION
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