1#!/usr/bin/perl
2#
3# Copyright 2014 Pierre Mavro <deimos@deimos.fr>
4# Copyright 2014 Vivien Didelot <vivien@didelot.org>
5# Copyright 2014 Andreas Guldstrand <andreas.guldstrand@gmail.com>
6#
7# Licensed under the terms of the GNU GPL v3, or any later version.
8
9use strict;
10use warnings;
11use utf8;
12use Getopt::Long;
13
14# default values
15my $t_warn = 50;
16my $t_crit = 80;
17my $cpu_usage = -1;
18my $decimals = 2;
19
20sub help {
21 print "Usage: cpu_usage [-w <warning>] [-c <critical>] [-d <decimals>]\n";
22 print "-w <percent>: warning threshold to become yellow\n";
23 print "-c <percent>: critical threshold to become red\n";
24 print "-d <decimals>: Use <decimals> decimals for percentage (default is $decimals) \n";
25 exit 0;
26}
27
28GetOptions("help|h" => \&help,
29 "w=i" => \$t_warn,
30 "c=i" => \$t_crit,
31 "d=i" => \$decimals,
32);
33
34# Get CPU usage
35$ENV{LC_ALL}="en_US"; # if mpstat is not run under en_US locale, things may break, so make sure it is
36open (MPSTAT, 'mpstat 1 1 |') or die;
37while (<MPSTAT>) {
38 if (/^.*\s+(\d+\.\d+)\s+$/) {
39 $cpu_usage = 100 - $1; # 100% - %idle
40 last;
41 }
42}
43close(MPSTAT);
44
45$cpu_usage eq -1 and die 'Can\'t find CPU information';
46
47# Print short_text, full_text
48printf "%02d.${decimals}%%\n", $cpu_usage;
49#printf "%.${decimals}f%%\n", $cpu_usage;
50
51# Print color, if needed
52if ($cpu_usage >= $t_crit) {
53 print "#FF0000\n";
54 exit 33;
55} elsif ($cpu_usage >= $t_warn) {
56 print "#FFFC00\n";
57}
58
59exit 0;