1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
package Nagios::Plugin::Range;
use 5.006;
use strict;
use warnings;
use Carp;
use Nagios::Plugin::Functions;
our ($VERSION) = $Nagios::Plugin::Functions::VERSION;
use overload
'""' => sub { shift->stringify };
use Class::Struct;
struct "Nagios::Plugin::Range" => {
start => '$',
end => '$',
start_infinity => '$', # TRUE / FALSE
end_infinity => '$', # TRUE / FALSE
alert_on => '$', # OUTSIDE 0, INSIDE 1, not defined == range not set
};
use constant OUTSIDE => 0;
use constant INSIDE => 1;
sub stringify {
my $self = shift;
return "" unless $self->is_set;
return (($self->alert_on) ? "@" : "") .
(($self->start_infinity == 1) ? "~:" : (($self->start == 0)?"":$self->start.":")) .
(($self->end_infinity == 1) ? "" : $self->end);
}
sub is_set {
my $self = shift;
(! defined $self->alert_on) ? 0 : 1;
}
sub set_range_start {
my ($self, $value) = @_;
$self->start($value+0); # Force scalar into number
$self->start_infinity(0);
}
sub set_range_end {
my ($self, $value) = @_;
$self->end($value+0); # Force scalar into number
$self->end_infinity(0);
}
# Returns a N::P::Range object if the string is a conforms to a Nagios Plugin range string, otherwise null
sub parse_range_string {
my ($class, $string) = @_;
my $valid = 0;
my $range = $class->new( start => 0, start_infinity => 0, end => 0, end_infinity => 1, alert_on => OUTSIDE);
$string =~ s/\s//g; # strip out any whitespace
# check for valid range definition
unless ( $string =~ /[\d~]/ && $string =~ m/^\@?(-?[\d.]+|~)?(:(-?[\d.]+)?)?$/ ) {
carp "invalid range definition '$string'";
return undef;
}
if ($string =~ s/^\@//) {
$range->alert_on(INSIDE);
}
if ($string =~ s/^~//) { # '~:x'
$range->start_infinity(1);
}
if ( $string =~ m/^([\d\.-]+)?:/ ) { # '10:'
my $start = $1;
$range->set_range_start($start) if defined $start;
$range->end_infinity(1); # overridden below if there's an end specified
$string =~ s/^([-\d\.]+)?://;
$valid++;
}
if ($string =~ /^([-\d\.]+)$/) { # 'x:10' or '10'
$range->set_range_end($string);
$valid++;
}
if ($valid && ($range->start_infinity == 1 || $range->end_infinity == 1 || $range->start <= $range->end)) {
return $range;
}
return undef;
}
# Returns 1 if an alert should be raised, otherwise 0
sub check_range {
my ($self, $value) = @_;
my $false = 0;
my $true = 1;
if ($self->alert_on == INSIDE) {
$false = 1;
$true = 0;
}
if ($self->end_infinity == 0 && $self->start_infinity == 0) {
if ($self->start <= $value && $value <= $self->end) {
return $false;
} else {
return $true;
}
} elsif ($self->start_infinity == 0 && $self->end_infinity == 1) {
if ( $value >= $self->start ) {
return $false;
} else {
return $true;
}
} elsif ($self->start_infinity == 1 && $self->end_infinity == 0) {
if ($value <= $self->end) {
return $false;
} else {
return $true;
}
} else {
return $false;
}
}
1;
__END__
=head1 NAME
Nagios::Plugin::Range - Common range functions for Nagios::Plugin
=head1 DESCRIPTION
Handles common Nagios Plugin range data. See Nagios::Plugin for creation interfaces.
=head1 AUTHOR
Ton Voon, E<lt>ton.voon@altinity.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2006 by Altinity Limited
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.8.4 or,
at your option, any later version of Perl 5 you may have available.
=cut
|
