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#!/usr/bin/env perl
use Getopt::Long;
my ( $opt_h, $opt_w, $opt_c, $opt_t, $status, $state, $msg );
my $msg_count = 0;
my $path_to_exim = `which exim`;
chop $path_to_exim;
my $path_to_sudo = `which sudo`;
chop $path_to_sudo;
$path_to_sudo //= '';
my $timeout = 15;
my %ERRORS = ( 'OK' => 0, 'WARNING' => 1, 'CRITICAL' => 2, 'UNKNOWN' => 3 );
$status = process_arguments();
if ($status) {
print "ERROR: processing arguments\n";
exit $ERRORS{"UNKNOWN"};
}
$SIG{'ALRM'} = sub {
print("ERROR: timed out waiting for $path_to_exim \n");
exit $ERRORS{"WARNING"};
};
alarm($opt_t);
if ( defined $path_to_exim && -x $path_to_exim ) {
$msg_count = `$path_to_sudo $path_to_exim -bpc`;
}
else {
print "Check permissions and path to exim\n";
exit $ERRORS{'UNKNOWN'};
}
if ($?) {
print "CRITICAL: Error code \n"
. ( $? >> 8 )
. " returned from $path_to_exim", $/;
exit $ERRORS{CRITICAL};
}
chomp $msg_count;
my $perfdata = " | count=$msg_count;$opt_w;$opt_c;;";
if ( $msg_count < $opt_w ) {
$msg = "OK: mailq ($msg_count) is below threshold ($opt_w/$opt_c) $perfdata";
$state = $ERRORS{'OK'};
}
elsif ( $msg_count >= $opt_w && $msg_count < $opt_c ) {
$msg = "WARNING: mailq is $msg_count (threshold w = $opt_w) $perfdata";
$state = $ERRORS{'WARNING'};
}
else {
$msg = "CRITICAL: mailq is $msg_count (threshold c = $opt_c) $perfdata";
$state = $ERRORS{'CRITICAL'};
}
print "$msg\n";
exit $state;
#### subs
sub process_arguments() {
GetOptions(
"h" => \$opt_h,
"help" => \$opt_h,
"w=i" => \$opt_w,
"warning=i" => \$opt_w, # warning if above this number
"c=i" => \$opt_c,
"critical=i" => \$opt_c, # critical if above this number
"t=i" => \$opt_t,
"timeout=i" => \$opt_t
);
if ($opt_h) {
print_help();
exit $ERRORS{'OK'};
}
unless ( defined $opt_t ) {
$opt_t = $timeout;
}
unless ( defined $opt_w && defined $opt_c ) {
print "Usage: $0 -w <warn> -c <crit> [-t <timeout>]\n";
exit $ERRORS{'UNKNOWN'};
}
if ( $opt_w >= $opt_c ) {
print "Warning (-w) cannot be greater than Critical (-c)!\n";
return $ERRORS{'UNKNOWN'};
}
return $ERRORS{'OK'};
}
sub print_help () {
my $help_text = <<'END';
Usage: %s -w <warn> -c <crit> [-t <timeout>]
Checks the number of messages in the mail queue for EXIM mta
-w (--warning) = Min. number of messages in queue to generate warning
-c (--critical) = Min. number of messages in queue to generate critical alert ( w < c )
-t (--timeout) = Plugin timeout in seconds (default = %s)
-h (--help)
END
printf( $help_text, $0, $timeout );
}