Show Ethernet drivers on Linux

sample_output

% what_eth_drivers.sh
             br0 [ac:22:0b:c3:cd:2a]:            (up)
         docker0 [02:42:6b:bb:b4:67]:            (down)
          enp3s0 [ac:22:0b:c3:cd:2a]:      r8169 (up)
          enp5s0 [00:01:02:d8:91:07]:      3c59x (unknown)
 enx00e04c6800e5 [00:e0:4c:68:00:e5]:      r8152 (down)
              lo [00:00:00:00:00:00]:            (unknown)
          vmnet1 [00:50:56:c0:00:01]:            (unknown)
          vmnet8 [00:50:56:c0:00:08]:            (unknown)

what_eth_drivers.sh

#!/bin/bash
#
# See: https://unix.stackexchange.com/a/225496/50007
# See: https://gist.github.com/JonathonReinhart/573694d541dc2108f7629aaa615cef3b
#

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 "$f/operstate")
    printf "%16s [%s]: %10s (%s)\n" "$dev" "$addr" "$driver" "$operstate"
done