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#!/bin/sh
## Backlight controller generic: use either light or xbacklight
#{{{ printhelp
printhelp () {
printf "Backlight control interface\n"
printf "bl -h\n"
printf "bl [-xX] [-idg]\n"
printf "bl [-xX] -I X\n"
printf "bl [-xX] -D X\n"
printf "bl [-xX] -s X\n"
printf "\t-i) \tincreases the backlight\n"
printf "\t-I) X\tincreases the backlight by X percent\n"
printf "\t-d) \tdecreases the backlight\n"
printf "\t-D) X\tdecreases the backlight by X percent\n"
printf "\t-s) X\tsets the backlight to X percent\n"
printf "\t-g) \tgets the backlight\n"
printf "\t-h) \tprints this help message.\n"
printf "\t-x) \tuse light instead of brightnessctl.\n"
printf "\t-X) \tdon't use light instead of brightnessctl.\n"
}
#}}}
#{{{ defaults
CMD="brightnessctl"
ARG="get"
AMT="1"
#}}}
#{{{ getopts2
while getopts "hxXidgI:D:s:" o; do case "${o}" in
x) CMD="light" ;;
X) CMD="brightnessctl" ;;
i) ARG="inc" ;;
d) ARG="dec" ;;
g) ARG="get" ;;
I)
ARG="inc"
AMT="$OPTARG"
;;
D)
ARG="dec"
AMT="$OPTARG"
;;
s)
ARG="set"
AMT="$OPTARG"
;;
*) printhelp ;;
esac done
#}}}
#{{{ main
case "$CMD" in
"brightnessctl")
case "$ARG" in
"inc")
brightnessctl set -s "+$AMT%"
brightnessctl -s
;;
"dec")
brightnessctl set -s "$AMT%-"
brightnessctl -s
;;
"set")
brightnessctl set -s "$AMT%"
brightnessctl -s
;;
"get")
brightnessctl | cut -d' ' -f3 | paste -s -d' ' | awk '{printf "%5.2f\n", 100 * $2 / $3}'
;;
esac
;;
"light")
case "$ARG" in
"inc")
light -A "$AMT"
;;
"dec")
light -U "$AMT"
;;
"set")
light -S "$AMT"
;;
"get")
light -G
;;
esac
;;
esac
#}}}
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