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#!/bin/bash
#
# USB hotplug switcher.
# See https://links.sarava.org/tags/badusb
# https://www.kernel.org/doc/Documentation/usb/authorization.txt
#
# Parameters
BASENAME="`basename $0`"
# Set hotplug state
function usb_set_state {
echo "Applying at /sys/module/usbcore/parameters/authorized_default..."
sudo su -c "echo $1 > /sys/module/usbcore/parameters/authorized_default"
for bus in /sys/bus/usb/devices/usb*; do
echo "Applying at ${bus}/authorized_default..."
sudo su -c "echo $1 > ${bus}/authorized_default"
done
}
# Dispatch
if [ "$BASENAME" == 'usb-enable' ]; then
usb_set_state 1
elif [ "$BASENAME" == 'usb-disable' ]; then
usb_set_state 0
elif [ "$BASENAME" == 'usb-status' ]; then
status="`cat /sys/module/usbcore/parameters/authorized_default`"
if [ "$status" == "0" ]; then
echo "Hotplug disabled."
elif [ "$status" == "1" ]; then
echo "Hotplug enabled."
fi
fi
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