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#!/usr/bin/env perl
use warnings;
use Carp;
use Getopt::Long;
use File::Basename;
sub usage {
print <<"END_USAGE";
Usage:
$0 [ options ]
Options:
--interface - if not specified check all interfaces in up state
--interval - how long in seconds do the measurment; default 15
END_USAGE
exit 1;
}
my ( $interface, $interval );
GetOptions(
'interface=s' => \$interface,
'interval=i' => \$interval,
) || usage;
$interval //= 15;
$interface //= 'all';
my @interfaces;
if ( $interface eq 'all' ) {
my @all_interfaces = </sys/class/net/*>;
@interfaces = map { basename $_ }
grep { -d "$_/bonding" && `grep -i up $_/operstate` } @all_interfaces;
# if bonding not found select all interfaces in up state
@interfaces
= map { basename $_ }
grep { !-d "$_/bridge" && `grep -i up $_/operstate` } @all_interfaces
if !@interfaces;
# or try to select venet ones
@interfaces = grep /^venet/, map { basename $_ } @all_interfaces
if !@interfaces;
}
else {
@interfaces = split( / /, $interface );
}
my %data;
for my $i (@interfaces) {
for my $d (qw( rx tx )) {
my $bytes = `cat /sys/class/net/$i/statistics/${d}_bytes`;
chomp $bytes;
$data{$i}{$d} = $bytes;
}
}
sleep $interval;
my $output;
my $perfdata;
for my $i ( keys %data ) {
for my $d (qw( rx tx )) {
my $bytes = `cat /sys/class/net/$i/statistics/${d}_bytes`;
chomp $bytes;
$data{$i}{$d} = $bytes - $data{$i}{$d};
}
my $iface_speed_bits = `expr \$(cat /sys/class/net/$i/speed 2>/dev/null) '*' 1000000 2>/dev/null`;
chomp $iface_speed_bits;
$iface_speed_bits //= 100000000;
my $in_bits = sprintf( "%d", $data{$i}{rx} * 8 / $interval );
my $out_bits = sprintf( "%d", $data{$i}{tx} * 8 / $interval );
my $in_mbits = sprintf( "%.2f", $in_bits / 1000000 );
my $out_mbits = sprintf( "%.2f", $out_bits / 1000000 );
$output .= "${i}_in=$in_mbits Mbit/s, ${i}_out=$out_mbits Mbit/s; ";
$perfdata
.= "${i}_in=$in_bits;;;;$iface_speed_bits ${i}_out=$out_bits;;;;$iface_speed_bits ";
}
if ( !$output ) {
print "empty output\n";
exit 1;
}
print "$output | $perfdata\n";