pcibus-to-name

#!/bin/bash
# Used to map PCI bus to name

# CONSTANTS
INTF_NAME="eth"
INTF_NUMBER=0
RULES_FILE="/etc/udev/rules.d/70-persistent-net.rules"

# Get all PCI bus, order them ascending and assign to an array
pci_bus_array=( $(for dir in /sys/class/net/* ; do [ -e $dir/device ] && { basename $dir ; readlink -f $dir/device; }; done | grep devices | sort -n) )

# Iterate through PCI bus array and change each NIC name
for pci_bus in "${pci_bus_array[@]}"; do

  echo "Mapping ${pci_bus} to $INTF_NAME$INTF_NUMBER"
  line_number=$(grep -n $pci_bus $RULES_FILE | awk -F: '{print $1}')
  line_number=$(($line_number + 1))
  sed -i "${line_number}s/eth[0-9]/${INTF_NAME}${INTF_NUMBER}/" $RULES_FILE
  INTF_NUMBER=$(($INTF_NUMBER + 1))

done