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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
package Nagios::Plugin::Range;
use 5.006;
use strict;
use warnings;
use Carp;
use base qw(Class::Accessor::Fast);
__PACKAGE__->mk_accessors(
qw(start end start_infinity end_infinity alert_on)
);
use Nagios::Plugin::Functions qw(:DEFAULT $value_re);
our ($VERSION) = $Nagios::Plugin::Functions::VERSION;
use overload
'eq' => sub { shift->_stringify },
'""' => sub { shift->_stringify };
# alert_on constants (undef == 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~]/ && $string =~ m/^\@?($value_re|~)?(:($value_re)?)?$/ ) {
carp "invalid range definition '$string'";
return undef;
}
if ($string =~ s/^\@//) {
$range->alert_on(INSIDE);
}
if ($string =~ s/^~//) { # '~:x'
$range->start_infinity(1);
}
if ( $string =~ m/^($value_re)?:/ ) { # '10:'
my $start = $1;
$range->_set_range_start($start) if defined $start;
$range->end_infinity(1); # overridden below if there's an end specified
$string =~ s/^($value_re)?://;
$valid++;
}
if ($string =~ /^($value_re)$/) { # '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;
}
}
# Constructor - map args to hashref for SUPER
sub new
{
shift->SUPER::new({ @_ });
}
1;
__END__
=head1 NAME
Nagios::Plugin::Range - class for handling Nagios::Plugin range data.
=head1 SYNOPSIS
# NB: This is an internal Nagios::Plugin class.
# See Nagios::Plugin itself for public interfaces.
# Instantiate an empty range object
$r = Nagios::Plugin::Range->new;
# Instantiate by parsing a standard nagios range string
$r = Nagios::Plugin::Range->parse_range_string( $range_str );
# Returns true if the range is defined/non-empty
$r->is_set;
# Returns true if $value matches range, false otherwise
$r->check_range($value);
=head1 DESCRIPTION
Internal Nagios::Plugin class for handling common range data. See
Nagios::Plugin for public interfaces.
=head1 AUTHOR
This code is maintained by the Nagios Plugin Development Team: see
http://nagiosplug.sourceforge.net.
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2006-2007 Nagios Plugin Development Team
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
|
