#!/usr/bin/perl

# https://perlmonks.org/?node_id=1222210

use strict;
use warnings;

my $devstats;

readfile("/sys/class/net/dsl/statistics/rx_bytes");
readfile("/sys/class/net/dsl/mtu");
readfile("/sys/class/net/tybalt/mtu");
readfile("/sys/class/net/tybalt/statistics/rx_bytes");
readfile("/sys/class/net/dsl/queues/tx-0/byte_queue_limits/inflight");

use Data::Dumper; print Dumper $devstats;

exit(0);

sub readfile {
  my $file = shift;

  my @data = split("/", $file);
  my $nic = $data[4];

  open(FIFO, "< $file") or die "$! opening $file";
  my $value = <FIFO>;
  if (defined($value)) {
    chomp($value);
    my $hashref = \$devstats->{$nic};
    $hashref = \$$hashref->{$_} for @data[5 .. $#data];
    $$hashref = $value;
  }
  close(FIFO);
}