This file is indexed.

/etc/acpi/asus-brn-up.sh is in acpi-support 0.140.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
test -f /usr/share/acpi-support/key-constants || exit 0

. /usr/share/acpi-support/key-constants

DeviceConfig

if [ "$model" != "701" ] ; then
	# On an Eee PC (ASUSTeK model 701) the keys in the range handled by this
	# script have entirely different meanings. They are handled in separate
	# scripts.
	acpi_fakekey $KEY_BRIGHTNESSUP
fi