Show Ethernet drivers on Linux

sample_output

$ ~/what_eth_drivers.sh 
      eth0 [52:54:00:aa:bb:cc]: virtio_net (up)
      eth1 [52:54:00:dd:ee:ff]: virtio_net (up)
      eth2 [52:54:00:99:88:77]: virtio_net (up)
        lo [00:00:00:00:00:00]:            (unknown)

what_eth_drivers.sh

#!/bin/bash
for f in /sys/class/net/*; do
    dev=$(basename $f)
    driver=$(readlink $f/device/driver/module)
    if [ $driver ]; then
        driver=$(basename $driver)
    fi
    addr=$(cat $f/address)
    operstate=$(cat $f/operstate)
    printf "%10s [%s]: %10s (%s)\n" "$dev" "$addr" "$driver" "$operstate"
done

Thanks for this nice script. Side note: here I have fixed the warnings that shellcheck would print. 😉

#!/bin/bash
for f in /sys/class/net/*; do
    dev=$(basename "$f")
    driver=$(readlink "$f/device/driver/module")
    if [ "$driver" ]; then
        driver=$(basename "$driver")
    fi
    addr=$(cat "$f/address")
    operstate=$(cat "$f/operstate")
    printf "%10s [%s]: %10s (%s)\n" "$dev" "$addr" "$driver" "$operstate"
done

(Basically variables should be double-quoted to prevent globbing and word splitting.)