1 #!/usr/local/bin/perl -w
3 # check_mailq - check to see how many messages are in the smtp queue awating
4 # transmittal.
5 #
6 # Initial version support sendmail's mailq command
8 # License Information:
9 # This program is free software; you can redistribute it and/or modify
10 # it under the terms of the GNU General Public License as published by
11 # the Free Software Foundation; either version 2 of the License, or
12 # (at your option) any later version.
13 #
14 # This program is distributed in the hope that it will be useful,
15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 # GNU General Public License for more details.
18 #
19 # You should have received a copy of the GNU General Public License
20 # along with this program; if not, write to the Free Software
21 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #
23 ############################################################################
25 use POSIX;
26 use strict;
27 use Getopt::Long;
28 use vars qw($opt_V $opt_h $opt_v $verbose $PROGNAME $opt_w $opt_c $opt_t $status $state $msg $msg_q );
29 use lib utils.pm;
30 use utils qw(%ERRORS &print_revision &support &usage );
32 #my $MAILQ = "/usr/bin/mailq"; # need to migrate support to utils.pm and autoconf
35 sub print_help ();
36 sub print_usage ();
37 sub process_arguments ();
39 $ENV{'PATH'}='';
40 $ENV{'BASH_ENV'}='';
41 $ENV{'ENV'}='';
42 $PROGNAME = "check_mailq";
44 Getopt::Long::Configure('bundling');
45 $status = process_arguments();
46 if ($status){
47 print "ERROR: processing arguments\n";
48 exit $ERRORS{"UNKNOWN"};
49 }
51 $SIG{'ALRM'} = sub {
52 print ("ERROR: timed out waiting for $utils::PATH_TO_MAILQ \n");
53 exit $ERRORS{"WARNING"};
54 };
55 alarm($opt_t);
57 ## open mailq
58 if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
59 if (! open (MAILQ, "$utils::PATH_TO_MAILQ | " ) ) {
60 print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
61 exit $ERRORS{'UNKNOWN'};
62 }
63 }else{
64 print "ERROR: Could not find mailq executable!\n";
65 exit $ERRORS{'UNKNOWN'};
66 }
68 # only first line is relevant in this iteration.
69 while (<MAILQ>) {
70 if (/mqueue/) {
71 print "$utils::PATH_TO_MAILQ = $_ "if $verbose ;
72 if (/empty/ ) {
73 $msg = "OK: mailq is empty";
74 $msg_q = 0;
75 $state = $ERRORS{'OK'};
76 }elsif ( /(\d+)/ ) {
77 $msg_q = $1 ;
79 print "msg_q = $msg_q warn=$opt_w crit=$opt_c\n" if $verbose;
81 if ($msg_q < $opt_w) {
82 $msg = "OK: mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
83 $state = $ERRORS{'OK'};
84 }elsif ($msg_q >= $opt_w && $msg_q < $opt_c) {
85 $msg = "WARNING: mailq is $msg_q (threshold w = $opt_w)";
86 $state = $ERRORS{'WARNING'};
87 }else {
88 $msg = "CRITICAL: mailq is $msg_q (threshold c = $opt_c)";
89 $state = $ERRORS{'CRITICAL'};
90 }
92 }
94 last;
95 }
97 }
99 close (MAILQ);
100 # declare an error if we also get a non-zero return code from mailq
101 # unless already set to critical
102 if ( $? ) {
103 print "stderr = $? : $! \n" if $verbose;
104 $state = $state == $ERRORS{"CRITICAL"} ? $ERRORS{"CRITICAL"} : $ERRORS{"UNKNOWN"} ;
105 print "MAILQ error: $!\n" if $verbose;
106 }
107 ## close mailq
109 # Perfdata support
110 print "$msg | mailq = $msg_q\n";
111 exit $state;
114 #####################################
115 #### subs
118 sub process_arguments(){
119 GetOptions
120 ("V" => \$opt_V, "version" => \$opt_V,
121 "v" => \$opt_v, "verbose" => \$opt_v,
122 "h" => \$opt_h, "help" => \$opt_h,
123 "w=i" => \$opt_w, "warning=i" => \$opt_w, # warning if above this number
124 "c=i" => \$opt_c, "critical=i" => \$opt_c, # critical if above this number
125 "t=i" => \$opt_t, "timeout=i" => \$opt_t
126 );
128 if ($opt_V) {
129 print_revision($PROGNAME,'$Revision$ ');
130 exit $ERRORS{'OK'};
131 }
133 if ($opt_h) {
134 print_help();
135 exit $ERRORS{'OK'};
136 }
138 if (defined $opt_v ){
139 $verbose = $opt_v;
140 }
142 unless (defined $opt_t) {
143 $opt_t = $utils::TIMEOUT ; # default timeout
144 }
146 unless ( defined $opt_w && defined $opt_c ) {
147 print_usage();
148 exit $ERRORS{'UNKNOWN'};
149 }
151 if ( $opt_w >= $opt_c) {
152 print "Warning cannot be greater than Critical!\n";
153 exit $ERRORS{'UNKNOWN'};
154 }
156 return $ERRORS{'OK'};
157 }
159 sub print_usage () {
160 print "Usage: $PROGNAME [-w <warn>] [-c <crit>] [-t <timeout>] [-v verbose]\n";
161 }
163 sub print_help () {
164 print_revision($PROGNAME,'$Revision$');
165 print "Copyright (c) 2002 Subhendu Ghosh\n";
166 print "\n";
167 print_usage();
168 print "\n";
169 print " Checks the number of messages in the mail queue\n";
170 print " Feedback/patches to support non-sendmail mailqueue welcome\n\n";
171 print "-w (--warning) = Min. number of messages in queue to generate warning\n";
172 print "-c (--critical) = Min. number of messages in queu to generate critical alert ( w < c )\n";
173 print "-t (--timeout) = Plugin timeout in seconds (default = $utils::TIMEOUT)\n";
174 print "-h (--help)\n";
175 print "-V (--version)\n";
176 print "-v (--verbose) = deebugging output\n";
177 print "\n\n";
178 support();
179 }