#!/bin/sh
#Copyright: 2026 Aitor <aitor@genuen.org>
#License: CC0-1.0
#Comment: oneshot; invoke with: sv once brightness

exec 2>&1

ebegin() { [ "${VERBOSE:-}" = no ] || echo "$@"; }
eend() { r=${1:-0}; shift || true; [ "$r" -eq 0 ] || [ "${VERBOSE:-}" = no ] || echo "$*" >&2; return "$r"; }
einfo() { [ "${VERBOSE:-}" = no ] || echo "$@"; }
ewarn() { echo "$@" >&2; }
eerror() { echo "$@" >&2; }

sv once mountall-bootclean.sh || exit 1

readonly SAVEFILE_PREFIX=/var/lib/initscripts/brightness
. /lib/init/vars.sh

do_start_one() {
	local label=$1 knob=$2 max=$3 file=$SAVEFILE_PREFIX${1:+.$1}
	test -e "$knob" || return 0
	test x"$VERBOSE" = x"no" || ebegin "Initialising $label brightness level"
	if test -f "$file"; then cat "$file" >"$knob"; else cat "$max" >"$knob"; fi
	local rv=$?
	test x"$VERBOSE" = x"no" || eend $rv
	return $rv
}

rv=0
do_start_one '' /sys/class/backlight/acpi_video0/brightness /sys/class/backlight/acpi_video0/max_brightness || rv=$?
do_start_one intel /sys/class/backlight/intel_backlight/brightness /sys/class/backlight/intel_backlight/max_brightness || rv=$?
exit $rv
