#!/bin/bash

SYSPATH="/sys/class/net/$1"

DEV_ID=$(<"${SYSPATH}/dev_id")

DEV_PORT=$(<"${SYSPATH}/dev_port")

PHYS_PORT_NAME=$(<"${SYSPATH}/phys_port_name")

#if PHYS_PORT_NAME is empty we are safe

[ -z "${PHYS_PORT_NAME}" ] && exit 0

# On-board index based names

if [ -n "${ID_NET_NAME_ONBOARD}" ]; then

    ID_NET_NAME_ONBOARD="${ID_NET_NAME_ONBOARD%d${DEV_PORT}}n${PHYS_PORT_NAME}"

fi

if [ -n "${DEV_ID}" ]; then

    DEV_ID=$(printf "%u" "${DEV_ID}")

    if [ "${DEV_ID}" -eq "0" ] && [ -n "${DEV_PORT}" ]; then

        # dev_port is decimal string, but we have a bug in net_id and we convert it to integer using base 16

        DEV_ID=$(printf "%u" "0x${DEV_PORT}")

    fi

fi

# PCI hot plug slot number based names

if [ -n "${ID_NET_NAME_SLOT}" ]; then

    ID_NET_NAME_SLOT="${ID_NET_NAME_SLOT%d${DEV_ID}}n${PHYS_PORT_NAME}"

fi

# PCI path based names

if [ -n "${ID_NET_NAME_PATH}" ]; then

    ID_NET_NAME_PATH="${ID_NET_NAME_PATH%d${DEV_ID}}n${PHYS_PORT_NAME}"

fi

[ -n "${ID_NET_NAME_ONBOARD}" ] && echo "ID_NET_NAME_ONBOARD=${ID_NET_NAME_ONBOARD}"

[ -n "${ID_NET_NAME_SLOT}" ] && echo "ID_NET_NAME_SLOT=${ID_NET_NAME_SLOT}"

[ -n "${ID_NET_NAME_PATH}" ] && echo "ID_NET_NAME_PATH=${ID_NET_NAME_PATH}"