print the relevant hardware information about the network interfaces

ethinfo.sh

#!/bin/bash

# show all the relevant hardware information from network interfaces

for DEV in /sys/class/net/* ; do
	dev_name=$(basename "${DEV}")
	echo "# $dev_name  ========================================="
	hardware_path=$(udevadm info --query=path --path=${DEV} 2>&1)
	if [ -z "$hardware_path" ]; then
		echo "Could not find the hardware path, skipping."
		continue
	fi

	if [[ $hardware_path =~ "virtual" ]]; then
		echo "It's a virtual device, skipping."
		continue
	fi

	# FIXME: this is horrifying but path length varies
	#        so we have to work from the end of the string
	pci_address=${hardware_path%/*}
	pci_address=${pci_address%/*}
	pci_address=${pci_address##*/}
	pci_address=${pci_address#*:}

	pci_name=$(lspci 2>&1 | grep "^$pci_address")
	if [ -z "$pci_name" ]; then
		pci_name="Could not find the PCI name"
	fi

	link_detected=$(ethtool ${dev_name} | grep -i "Link detected" | awk {'print $3'})
	if [ -z "$link_detected" ]; then
		link_detected="no"
	fi


	# report our findings
	echo "PCI name: $pci_name"
	echo "Hardware path: $hardware_path"
	echo "Link detected: $link_detected"

done