#!/bin/sh

set -e
[ -n "$DEBUG" ] && set -x

# check requirements
for tool in awk fd; do
	if ! command -v "$tool" >/dev/null; then
		printf "%s: %s not installed but required\n" "$(basename "$0")" "$tool" >&2
		exit 1
	fi
done

if [ "$1" = "-h" ]; then
	printf "usage: %s DEV_NODE\n\n" "$0"
	exit 2
fi

dev_node=$1
dev_node=$(basename "${dev_node}")

serial=$(fd "${dev_node}" /sys/devices |
	awk 'BEGIN{RS="/"} /usb/{print}' |
	xargs -I{} cat /sys/bus/usb/devices/{}/serial)
[ -z "${serial}" ] && exit 1

bus=$(fd "${serial}" /sys/bus/pci/drivers/)
[ -z "${bus}" ] && exit 1

driver=$(dirname "${bus}")
[ -z "${driver}" ] && exit 1

printf "%s" "${serial}" | doas tee "${driver}/unbind" >/dev/null
sleep 2
printf "%s" "${serial}" | doas tee "${driver}/bind" >/dev/null