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
|
#!/usr/bin/perl
#
# very straightforward dns monitor for use with "mon"
#
# arguments:
# -t timeout timeout (defaults to 5 seconds)
# -n name name to query, defaults to "mailhost"
#
# $Id: dns-query.monitor,v 1.1.1.1 2004/06/09 05:18:06 trockij Exp $
#
# Copyright (C) 2003, Jim Trocki
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
use strict;
use Getopt::Std;
use Net::DNS::Resolver;
my %opt;
getopts ("t:n:", \%opt);
my $TIMEOUT = defined $opt{"t"} ? $opt{"t"} : 5;
my $NAME = $opt{"n"} || "mailhost";
my $r = Net::DNS::Resolver->new;
if (!defined $r)
{
die "could not create new Net::DNS::Resolver object\n";
}
$r->udp_timeout ($TIMEOUT);
my (%good, %bad);
foreach my $server (@ARGV)
{
$r->nameservers ($server);
my $p = $r->search ($NAME);
if (!defined $p)
{
$bad{$server}->{"detail"} = $r->errorstring;
}
else
{
my $n = $p->{"answer"}->[0];
$good{$server}->{"detail"} = "$n->{name} $n->{class} $n->{type} $n->{address}";
}
}
if (keys %bad)
{
print join (" ", sort keys %bad), "\n";
}
else
{
print "\n";
}
if (keys %bad)
{
print "failures:\n";
foreach my $k (keys %bad)
{
print " $k: $bad{$k}->{detail} ($NAME)\n";
}
print "\n";
}
if (keys %good)
{
print "successes:\n";
foreach my $k (keys %good)
{
print " $k: successfull lookup for $good{$k}->{detail} ($NAME)\n";
}
}
exit 1 if (keys %bad);
exit 0;
|
