check_mailq: unify tabs/spaces

1 files changed, 507 insertions, 508 deletions

diff --git a/plugins-scripts/check_mailq.pl b/plugins-scripts/check_mailq.pl
index 26336b9..abdc773 100755
--- a/plugins-scripts/check_mailq.pl
+++ b/plugins-scripts/check_mailq.pl
@@ -29,8 +29,8 @@ use POSIX;
 use strict;
 use Getopt::Long;
 use vars qw($opt_V $opt_h $opt_v $verbose $PROGNAME $opt_w $opt_c $opt_t $opt_s $opt_d
-                                        $opt_M $mailq $status $state $msg $msg_q $msg_p $opt_W $opt_C $mailq $mailq_args
-                                        @lines %srcdomains %dstdomains);
+            $opt_M $mailq $status $state $msg $msg_q $msg_p $opt_W $opt_C $mailq $mailq_args
+            @lines %srcdomains %dstdomains);
 use FindBin;
 use lib "$FindBin::Bin";
 use utils qw(%ERRORS &print_revision &support &usage );
@@ -45,7 +45,7 @@ $ENV{'PATH'}='@TRUSTED_PATH@';
 $ENV{'BASH_ENV'}='';
 $ENV{'ENV'}='';
 $PROGNAME = "check_mailq";
-$mailq = 'sendmail';    # default
+$mailq = 'sendmail';    # default
 $msg_q = 0 ;
 $msg_p = 0 ;
 # If appended, must start with a space
@@ -55,28 +55,28 @@ $state = $ERRORS{'UNKNOWN'};
 Getopt::Long::Configure('bundling');
 $status = process_arguments();
 if ($status){
-        print "ERROR: processing arguments\n";
-        exit $ERRORS{"UNKNOWN"};
+    print "ERROR: processing arguments\n";
+    exit $ERRORS{"UNKNOWN"};
 }
 
 if ($opt_s) {
-        if (defined $utils::PATH_TO_SUDO && -x $utils::PATH_TO_SUDO) {
-                $sudo = $utils::PATH_TO_SUDO;
-        } else {
-                print "ERROR: Cannot execute sudo\n";
-                exit $ERRORS{'UNKNOWN'};
-        }
+    if (defined $utils::PATH_TO_SUDO && -x $utils::PATH_TO_SUDO) {
+        $sudo = $utils::PATH_TO_SUDO;
+    } else {
+        print "ERROR: Cannot execute sudo\n";
+        exit $ERRORS{'UNKNOWN'};
+    }
 } else {
-        $sudo = "";
+    $sudo = "";
 }
 
 if ($opt_d) {
-        $mailq_args = $mailq_args . ' -C ' . $opt_d;
+    $mailq_args = $mailq_args . ' -C ' . $opt_d;
 }
 
 $SIG{'ALRM'} = sub {
-        print ("ERROR: timed out waiting for $utils::PATH_TO_MAILQ \n");
-        exit $ERRORS{"WARNING"};
+    print ("ERROR: timed out waiting for $utils::PATH_TO_MAILQ \n");
+    exit $ERRORS{"WARNING"};
 };
 alarm($opt_t);
 
@@ -84,21 +84,21 @@ alarm($opt_t);
 
 if ($mailq eq "sendmail") {
 
-        ## open mailq
-        if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
-                if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ | " ) ) {
-                        print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        }elsif( defined $utils::PATH_TO_MAILQ){
-                unless (-x $utils::PATH_TO_MAILQ) {
-                        print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        } else {
-                print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
-                exit $ERRORS{'UNKNOWN'};
-        }
+    ## open mailq
+    if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
+        if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ | " ) ) {
+            print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    }elsif( defined $utils::PATH_TO_MAILQ){
+        unless (-x $utils::PATH_TO_MAILQ) {
+            print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    } else {
+        print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
+        exit $ERRORS{'UNKNOWN'};
+    }
 #  single queue empty
 ##/var/spool/mqueue is empty
 #  single queue: 1
@@ -168,190 +168,189 @@ if ($mailq eq "sendmail") {
 ## /var/spool/mqueue is empty
 ##                 Total requests: 0
 
-        my $this_msg_q = 0;
-        while (<MAILQ>) {
-
-                # match email addr on queue listing
-                if ( (/<.*@.*\.(\w+\.\w+)>/) || (/<.*@(\w+\.\w+)>/) ) {
-                        my $domain = $1;
-                        if (/^\w+/) {
-                        print "$utils::PATH_TO_MAILQ = srcdomain = $domain \n" if $verbose ;
-                    $srcdomains{$domain} ++;
-                        }
-                        next;
-                }
-
-                #
-                # ...
-                # sendmail considers a message with more than one destiny, say N, to the same MX
-                # to have N messages in queue.
-                # we will only consider one in this code
-                if (( /\s\(reply:\sread\serror\sfrom\s.*\.(\w+\.\w+)\.$/ ) || ( /\s\(reply:\sread\serror\sfrom\s(\w+\.\w+)\.$/ ) ||
-                        ( /\s\(timeout\swriting\smessage\sto\s.*\.(\w+\.\w+)\.:/ ) || ( /\s\(timeout\swriting\smessage\sto\s(\w+\.\w+)\.:/ ) ||
-                        ( /\s\(host\smap:\slookup\s\(.*\.(\w+\.\w+)\):/ ) || ( /\s\(host\smap:\slookup\s\((\w+\.\w+)\):/ ) ||
-                        ( /\s\(Deferred:\s.*\s.*\.(\w+\.\w+)\.\)/ ) || ( /\s\(Deferred:\s.*\s(\w+\.\w+)\.\)/ ) ) {
-
-                        print "$utils::PATH_TO_MAILQ = dstdomain = $1 \n" if $verbose ;
-                        $dstdomains{$1} ++;
-                }
-
-                if (/\s+\(I\/O\serror\)/) {
-                        print "$utils::PATH_TO_MAILQ = dstdomain = UNKNOWN \n" if $verbose ;
-                        $dstdomains{'UNKNOWN'} ++;
-                }
-
-                # Finally look at the overall queue length
-                #
-                if (/mqueue/) {
-                        print "$utils::PATH_TO_MAILQ = $_ "if $verbose ;
-                        if (/ \((\d+) request/) {
-                #
-                    # single queue: first line
-                    # multi queue: one for each queue. overwrite on multi queue below
-                  $this_msg_q = $1 ;
-                  $msg_q += $1 ;
-                        }
-                } elsif (/^\s+Total\sRequests:\s(\d+)$/i) {
-                        if ($this_msg_q) {
-                                $this_msg_q = 0 ;
-                        } else {
-                                print "$utils::PATH_TO_MAILQ = $_ \n" if $verbose ;
-                                #
-                                # multi queue: last line
-                                $msg_q += $1 ;
-                        }
-                }
-
-        }
-
-
-        ## close mailq
-
-        close (MAILQ);
-
-        if ( $? ) {
-                print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ",$/;
-                exit $ERRORS{CRITICAL};
-        }
-
-        ## shut off the alarm
-        alarm(0);
-
-
-
-        ## now check the queue length(s)
-
-        if ($msg_q == 0) {
-                $msg = "OK: $mailq mailq is empty";
-                $state = $ERRORS{'OK'};
-        } else {
-                print "msg_q = $msg_q warn=$opt_w crit=$opt_c\n" if $verbose;
-
-                # overall queue length
-                if ($msg_q < $opt_w) {
-                        $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
-                        $state = $ERRORS{'OK'};
-                }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
-                        $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
-                        $state = $ERRORS{'WARNING'};
-                }else {
-                        $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
-                        $state = $ERRORS{'CRITICAL'};
-                }
-
-                # check for domain specific queue lengths if requested
-                if (defined $opt_W) {
-
-                        # Apply threshold to queue lengths FROM domain
-                        my @srckeys = sort { $srcdomains{$b} <=> $srcdomains{$a} } keys %srcdomains;
-          my $srcmaxkey = $srckeys[0];
-        print "src max is $srcmaxkey with $srcdomains{$srcmaxkey} messages\n" if $verbose;
-
-                        if ($srcdomains{$srcmaxkey} >= $opt_W && $srcdomains{$srcmaxkey} < $opt_C) {
-                                if ($state == $ERRORS{'OK'}) {
-                                        $msg = "WARNING: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
-                                        $state = $ERRORS{'WARNING'};
-                                } elsif (($state == $ERRORS{'WARNING'}) || ($state == $ERRORS{'CRITICAL'})){
-                        $msg .= " -and- $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
-                                } else {
-                                        $msg = "WARNING: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
-                                        $state = $ERRORS{'WARNING'};
-                                }
-          } elsif ($srcdomains{$srcmaxkey} >= $opt_C) {
-                                if ($state == $ERRORS{'OK'}) {
-                                        $msg = "CRITICAL: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold C = $opt_C)";
-                                        $state = $ERRORS{'CRITICAL'};
-                                } elsif ($state == $ERRORS{'WARNING'}) {
-                                        $msg = "CRITICAL: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold C = $opt_C) -and- " . $msg;
-                                        $msg =~ s/WARNING: //;
-                                } elsif ($state == $ERRORS{'CRITICAL'}) {
-                                        $msg .= " -and- $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
-                                } else {
-                                        $msg = "CRITICAL: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
-                                        $state = $ERRORS{'CRITICAL'};
-                                }
-            } else {
-                                if ($srcdomains{$srcmaxkey} > 0) {
-                                        $msg .= " $srcdomains{$srcmaxkey} msgs. FROM $srcmaxkey is below threshold ($opt_W/$opt_C)";
-                                }
-                        }
-
-                        # Apply threshold to queue lengths TO domain
-                        my @dstkeys = sort { $dstdomains{$b} <=> $dstdomains{$a} } keys %dstdomains;
-            my $dstmaxkey = $dstkeys[0];
-          print "dst max is $dstmaxkey with $dstdomains{$dstmaxkey} messages\n" if $verbose;
-
-                        if ($dstdomains{$dstmaxkey} >= $opt_W && $dstdomains{$dstmaxkey} < $opt_C) {
-                                if ($state == $ERRORS{'OK'}) {
-                                        $msg = "WARNING: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
-                                        $state = $ERRORS{'WARNING'};
-                                } elsif (($state == $ERRORS{'WARNING'}) || ($state == $ERRORS{'CRITICAL'})){
-                                        $msg .= " -and- $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
-                                } else {
-                                        $msg = "WARNING: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
-                                        $state = $ERRORS{'WARNING'};
-                                }
-                        } elsif ($dstdomains{$dstmaxkey} >= $opt_C) {
-                                if ($state == $ERRORS{'OK'}) {
-                                        $msg = "CRITICAL: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold C = $opt_C)";
-                                        $state = $ERRORS{'CRITICAL'};
-                                } elsif ($state == $ERRORS{'WARNING'}) {
-                                        $msg = "CRITICAL: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold C = $opt_C) -and- " . $msg;
-                                        $msg =~ s/WARNING: //;
-                                } elsif ($state == $ERRORS{'CRITICAL'}) {
-                                        $msg .= " -and- $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
-                                } else {
-                                        $msg = "CRITICAL: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
-                                        $state = $ERRORS{'CRITICAL'};
-                                }
-                        } else {
-                                if ($dstdomains{$dstmaxkey} > 0) {
-                                        $msg .= " $dstdomains{$dstmaxkey} msgs. TO $dstmaxkey is below threshold ($opt_W/$opt_C)";
-                                }
-                        }
-
-                } # End of queue length thresholds
-
-        }
+    my $this_msg_q = 0;
+    while (<MAILQ>) {
+
+        # match email addr on queue listing
+        if ( (/<.*@.*\.(\w+\.\w+)>/) || (/<.*@(\w+\.\w+)>/) ) {
+            my $domain = $1;
+            if (/^\w+/) {
+              print "$utils::PATH_TO_MAILQ = srcdomain = $domain \n" if $verbose ;
+            $srcdomains{$domain} ++;
+            }
+            next;
+        }
+
+        #
+        # ...
+        # sendmail considers a message with more than one destiny, say N, to the same MX
+        # to have N messages in queue.
+        # we will only consider one in this code
+        if (( /\s\(reply:\sread\serror\sfrom\s.*\.(\w+\.\w+)\.$/ ) || ( /\s\(reply:\sread\serror\sfrom\s(\w+\.\w+)\.$/ ) ||
+            ( /\s\(timeout\swriting\smessage\sto\s.*\.(\w+\.\w+)\.:/ ) || ( /\s\(timeout\swriting\smessage\sto\s(\w+\.\w+)\.:/ ) ||
+            ( /\s\(host\smap:\slookup\s\(.*\.(\w+\.\w+)\):/ ) || ( /\s\(host\smap:\slookup\s\((\w+\.\w+)\):/ ) ||
+            ( /\s\(Deferred:\s.*\s.*\.(\w+\.\w+)\.\)/ ) || ( /\s\(Deferred:\s.*\s(\w+\.\w+)\.\)/ ) ) {
+
+            print "$utils::PATH_TO_MAILQ = dstdomain = $1 \n" if $verbose ;
+            $dstdomains{$1} ++;
+        }
+
+        if (/\s+\(I\/O\serror\)/) {
+            print "$utils::PATH_TO_MAILQ = dstdomain = UNKNOWN \n" if $verbose ;
+            $dstdomains{'UNKNOWN'} ++;
+        }
+
+        # Finally look at the overall queue length
+        #
+        if (/mqueue/) {
+            print "$utils::PATH_TO_MAILQ = $_ "if $verbose ;
+            if (/ \((\d+) request/) {
+            #
+            # single queue: first line
+            # multi queue: one for each queue. overwrite on multi queue below
+          $this_msg_q = $1 ;
+            $msg_q += $1 ;
+            }
+        } elsif (/^\s+Total\sRequests:\s(\d+)$/i) {
+            if ($this_msg_q) {
+                $this_msg_q = 0 ;
+            } else {
+                print "$utils::PATH_TO_MAILQ = $_ \n" if $verbose ;
+                #
+                # multi queue: last line
+                $msg_q += $1 ;
+            }
+        }
+
+    }
+
+
+    ## close mailq
+    close (MAILQ);
+
+    if ( $? ) {
+        print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ",$/;
+        exit $ERRORS{CRITICAL};
+    }
+
+    ## shut off the alarm
+    alarm(0);
+
+
+
+    ## now check the queue length(s)
+
+    if ($msg_q == 0) {
+        $msg = "OK: $mailq mailq is empty";
+        $state = $ERRORS{'OK'};
+    } else {
+        print "msg_q = $msg_q warn=$opt_w crit=$opt_c\n" if $verbose;
+
+        # overall queue length
+        if ($msg_q < $opt_w) {
+            $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
+            $state = $ERRORS{'OK'};
+        }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
+            $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
+            $state = $ERRORS{'WARNING'};
+        }else {
+            $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
+            $state = $ERRORS{'CRITICAL'};
+        }
+
+        # check for domain specific queue lengths if requested
+        if (defined $opt_W) {
+
+            # Apply threshold to queue lengths FROM domain
+            my @srckeys = sort { $srcdomains{$b} <=> $srcdomains{$a} } keys %srcdomains;
+            my $srcmaxkey = $srckeys[0];
+            print "src max is $srcmaxkey with $srcdomains{$srcmaxkey} messages\n" if $verbose;
+
+            if ($srcdomains{$srcmaxkey} >= $opt_W && $srcdomains{$srcmaxkey} < $opt_C) {
+                if ($state == $ERRORS{'OK'}) {
+                    $msg = "WARNING: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
+                    $state = $ERRORS{'WARNING'};
+                } elsif (($state == $ERRORS{'WARNING'}) || ($state == $ERRORS{'CRITICAL'})){
+                $msg .= " -and- $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
+                } else {
+                    $msg = "WARNING: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
+                    $state = $ERRORS{'WARNING'};
+                }
+            } elsif ($srcdomains{$srcmaxkey} >= $opt_C) {
+                if ($state == $ERRORS{'OK'}) {
+                    $msg = "CRITICAL: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold C = $opt_C)";
+                    $state = $ERRORS{'CRITICAL'};
+                } elsif ($state == $ERRORS{'WARNING'}) {
+                    $msg = "CRITICAL: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold C = $opt_C) -and- " . $msg;
+                    $msg =~ s/WARNING: //;
+                } elsif ($state == $ERRORS{'CRITICAL'}) {
+                    $msg .= " -and- $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
+                } else {
+                    $msg = "CRITICAL: $srcdomains{$srcmaxkey} messages in queue FROM $srcmaxkey (threshold W = $opt_W)";
+                    $state = $ERRORS{'CRITICAL'};
+                }
+            } else {
+                if ($srcdomains{$srcmaxkey} > 0) {
+                    $msg .= " $srcdomains{$srcmaxkey} msgs. FROM $srcmaxkey is below threshold ($opt_W/$opt_C)";
+                }
+            }
+
+            # Apply threshold to queue lengths TO domain
+            my @dstkeys = sort { $dstdomains{$b} <=> $dstdomains{$a} } keys %dstdomains;
+            my $dstmaxkey = $dstkeys[0];
+            print "dst max is $dstmaxkey with $dstdomains{$dstmaxkey} messages\n" if $verbose;
+
+            if ($dstdomains{$dstmaxkey} >= $opt_W && $dstdomains{$dstmaxkey} < $opt_C) {
+                if ($state == $ERRORS{'OK'}) {
+                    $msg = "WARNING: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
+                    $state = $ERRORS{'WARNING'};
+                } elsif (($state == $ERRORS{'WARNING'}) || ($state == $ERRORS{'CRITICAL'})){
+                    $msg .= " -and- $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
+                } else {
+                    $msg = "WARNING: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
+                    $state = $ERRORS{'WARNING'};
+                }
+            } elsif ($dstdomains{$dstmaxkey} >= $opt_C) {
+                if ($state == $ERRORS{'OK'}) {
+                    $msg = "CRITICAL: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold C = $opt_C)";
+                    $state = $ERRORS{'CRITICAL'};
+                } elsif ($state == $ERRORS{'WARNING'}) {
+                    $msg = "CRITICAL: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold C = $opt_C) -and- " . $msg;
+                    $msg =~ s/WARNING: //;
+                } elsif ($state == $ERRORS{'CRITICAL'}) {
+                    $msg .= " -and- $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
+                } else {
+                    $msg = "CRITICAL: $dstdomains{$dstmaxkey} messages in queue TO $dstmaxkey (threshold W = $opt_W)";
+                    $state = $ERRORS{'CRITICAL'};
+                }
+            } else {
+                if ($dstdomains{$dstmaxkey} > 0) {
+                    $msg .= " $dstdomains{$dstmaxkey} msgs. TO $dstmaxkey is below threshold ($opt_W/$opt_C)";
+                }
+            }
+
+        } # End of queue length thresholds
+
+    }
 
 } # end of ($mailq eq "sendmail")
 elsif ( $mailq eq "postfix" ) {
 
      ## open mailq
-        if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
-                if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ$mailq_args | " ) ) {
-                        print "ERROR: could not open $utils::PATH_TO_MAILQ$mailq_args \n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        }elsif( defined $utils::PATH_TO_MAILQ){
-                unless (-x $utils::PATH_TO_MAILQ) {
-                        print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        } else {
-                print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
-                exit $ERRORS{'UNKNOWN'};
+    if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
+        if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ$mailq_args | " ) ) {
+            print "ERROR: could not open $utils::PATH_TO_MAILQ$mailq_args \n";
+            exit $ERRORS{'UNKNOWN'};
         }
+    }elsif( defined $utils::PATH_TO_MAILQ){
+        unless (-x $utils::PATH_TO_MAILQ) {
+            print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    } else {
+        print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
+        exit $ERRORS{'UNKNOWN'};
+    }
 
 
         @lines = reverse <MAILQ>;
@@ -360,8 +359,8 @@ elsif ( $mailq eq "postfix" ) {
         close MAILQ;
 
         if ( $? ) {
-                print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ$mailq_args",$/;
-                exit $ERRORS{CRITICAL};
+        print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ$mailq_args",$/;
+        exit $ERRORS{CRITICAL};
         }
 
         ## shut off the alarm
@@ -370,11 +369,11 @@ elsif ( $mailq eq "postfix" ) {
         # check queue length
         if ($lines[0]=~/Kbytes in (\d+)/) {
                 $msg_q = $1 ;
-        }elsif ($lines[0]=~/Mail queue is empty/) {
-                $msg_q = 0;
+    }elsif ($lines[0]=~/Mail queue is empty/) {
+        $msg_q = 0;
         }else{
-                print "Couldn't match $utils::PATH_TO_MAILQ$mailq_args output\n";
-                exit   $ERRORS{'UNKNOWN'};
+            print "Couldn't match $utils::PATH_TO_MAILQ$mailq_args output\n";
+            exit   $ERRORS{'UNKNOWN'};
         }
 
         # check messages not processed
@@ -390,194 +389,194 @@ elsif ( $mailq eq "postfix" ) {
                 $msg = "OK: $mailq mailq reports queue is empty";
                 $state = $ERRORS{'OK'};
         } else {
-                print "msg_q = $msg_q warn=$opt_w crit=$opt_c\n" if $verbose;
-
-                # overall queue length
-                if ($msg_q < $opt_w) {
-                        $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
-                        $state = $ERRORS{'OK'};
-                }elsif  ($msg_q >= $opt_w  && $msg_q < $opt_c) {
-                        $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
-                        $state = $ERRORS{'WARNING'};
-                }else {
-                        $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
-                        $state = $ERRORS{'CRITICAL'};
-                }
-
-                # check messages not yet preprocessed (only compare is $opt_W and $opt_C
-                # are defined)
-
-                #if (defined $opt_W) {
-                #        $msg .= "[Preprocessed = $msg_p]";
-                #        if ($msg_p >= $opt_W && $msg_p < $opt_C ) {
-                #                $state = $state == $ERRORS{"CRITICAL"} ? $ERRORS{"CRITICAL"} : $ERRORS{"WARNING"}  ;
-                #        }elsif ($msg_p >= $opt_C ) {
-                #                $state = $ERRORS{"CRITICAL"} ;
-                #        }
-                #}
+            print "msg_q = $msg_q warn=$opt_w crit=$opt_c\n" if $verbose;
+
+            # overall queue length
+            if ($msg_q < $opt_w) {
+                    $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
+                    $state = $ERRORS{'OK'};
+            }elsif  ($msg_q >= $opt_w  && $msg_q < $opt_c) {
+                    $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
+                    $state = $ERRORS{'WARNING'};
+            }else {
+                    $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
+                    $state = $ERRORS{'CRITICAL'};
+            }
+
+            # check messages not yet preprocessed (only compare is $opt_W and $opt_C
+            # are defined)
+
+            #if (defined $opt_W) {
+            #        $msg .= "[Preprocessed = $msg_p]";
+            #        if ($msg_p >= $opt_W && $msg_p < $opt_C ) {
+            #                $state = $state == $ERRORS{"CRITICAL"} ? $ERRORS{"CRITICAL"} : $ERRORS{"WARNING"}  ;
+            #        }elsif ($msg_p >= $opt_C ) {
+            #                $state = $ERRORS{"CRITICAL"} ;
+            #        }
+            #}
         }
 } # end of ($mailq eq "postfix")
 elsif ( $mailq eq "qmail" ) {
 
-        # open qmail-qstat
-        if ( defined $utils::PATH_TO_QMAIL_QSTAT && -x $utils::PATH_TO_QMAIL_QSTAT ) {
-                if (! open (MAILQ, "$sudo $utils::PATH_TO_QMAIL_QSTAT | " ) ) {
-                        print "ERROR: could not open $utils::PATH_TO_QMAIL_QSTAT \n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        }elsif( defined $utils::PATH_TO_QMAIL_QSTAT){
-                unless (-x $utils::PATH_TO_QMAIL_QSTAT) {
-                        print "ERROR: $utils::PATH_TO_QMAIL_QSTAT is not executable by (uid $>:gid($)))\n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        } else {
-                print "ERROR: \$utils::PATH_TO_QMAIL_QSTAT is not defined\n";
-                exit $ERRORS{'UNKNOWN'};
-        }
-
-        @lines = <MAILQ>;
-
-        # close qmail-qstat
-        close MAILQ;
-
-        if ( $? ) {
-                print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ",$/;
-                exit $ERRORS{CRITICAL};
-        }
-
-        ## shut off the alarm
-        alarm(0);
-
-        # check queue length
-        if ($lines[0]=~/^messages in queue: (\d+)/) {
-                $msg_q = $1 ;
-        }else{
-                print "Couldn't match $utils::PATH_TO_QMAIL_QSTAT output\n";
-                exit   $ERRORS{'UNKNOWN'};
-        }
-
-        # check messages not processed
-        if ($lines[1]=~/^messages in queue but not yet preprocessed: (\d+)/) {
-                my $msg_p = $1;
-        }else{
-                print "Couldn't match $utils::PATH_TO_QMAIL_QSTAT output\n";
-                exit  $ERRORS{'UNKNOWN'};
-        }
-
-
-        # check queue length(s)
-        if ($msg_q == 0){
-                $msg = "OK: qmail-qstat reports queue is empty";
-                $state = $ERRORS{'OK'};
-        } else {
-                print "msg_q = $msg_q warn=$opt_w crit=$opt_c\n" if $verbose;
-
-                # overall queue length
-                if ($msg_q < $opt_w) {
-                        $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
-                        $state = $ERRORS{'OK'};
-                }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
-                        $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
-                        $state = $ERRORS{'WARNING'};
-                }else {
-                        $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
-                        $state = $ERRORS{'CRITICAL'};
-                }
-
-                # check messages not yet preprocessed (only compare is $opt_W and $opt_C
-                # are defined)
-
-                if (defined $opt_W) {
-                        $msg .= "[Preprocessed = $msg_p]";
-                        if ($msg_p >= $opt_W && $msg_p < $opt_C ) {
-                                $state = $state == $ERRORS{"CRITICAL"} ? $ERRORS{"CRITICAL"} : $ERRORS{"WARNING"}  ;
-                        }elsif ($msg_p >= $opt_C ) {
-                                $state = $ERRORS{"CRITICAL"} ;
-                        }
-                }
-        }
+    # open qmail-qstat
+    if ( defined $utils::PATH_TO_QMAIL_QSTAT && -x $utils::PATH_TO_QMAIL_QSTAT ) {
+        if (! open (MAILQ, "$sudo $utils::PATH_TO_QMAIL_QSTAT | " ) ) {
+            print "ERROR: could not open $utils::PATH_TO_QMAIL_QSTAT \n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    }elsif( defined $utils::PATH_TO_QMAIL_QSTAT){
+        unless (-x $utils::PATH_TO_QMAIL_QSTAT) {
+            print "ERROR: $utils::PATH_TO_QMAIL_QSTAT is not executable by (uid $>:gid($)))\n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    } else {
+        print "ERROR: \$utils::PATH_TO_QMAIL_QSTAT is not defined\n";
+        exit $ERRORS{'UNKNOWN'};
+    }
+
+    @lines = <MAILQ>;
+
+    # close qmail-qstat
+    close MAILQ;
+
+    if ( $? ) {
+        print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ",$/;
+        exit $ERRORS{CRITICAL};
+    }
+
+    ## shut off the alarm
+    alarm(0);
+
+    # check queue length
+    if ($lines[0]=~/^messages in queue: (\d+)/) {
+        $msg_q = $1 ;
+    }else{
+        print "Couldn't match $utils::PATH_TO_QMAIL_QSTAT output\n";
+        exit   $ERRORS{'UNKNOWN'};
+    }
+
+    # check messages not processed
+    if ($lines[1]=~/^messages in queue but not yet preprocessed: (\d+)/) {
+        my $msg_p = $1;
+    }else{
+        print "Couldn't match $utils::PATH_TO_QMAIL_QSTAT output\n";
+        exit  $ERRORS{'UNKNOWN'};
+    }
+
+
+    # check queue length(s)
+    if ($msg_q == 0){
+        $msg = "OK: qmail-qstat reports queue is empty";
+        $state = $ERRORS{'OK'};
+    } else {
+        print "msg_q = $msg_q warn=$opt_w crit=$opt_c\n" if $verbose;
+
+        # overall queue length
+        if ($msg_q < $opt_w) {
+            $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
+            $state = $ERRORS{'OK'};
+        }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
+            $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
+            $state = $ERRORS{'WARNING'};
+        }else {
+            $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
+            $state = $ERRORS{'CRITICAL'};
+        }
+
+        # check messages not yet preprocessed (only compare is $opt_W and $opt_C
+        # are defined)
+
+        if (defined $opt_W) {
+            $msg .= "[Preprocessed = $msg_p]";
+            if ($msg_p >= $opt_W && $msg_p < $opt_C ) {
+                $state = $state == $ERRORS{"CRITICAL"} ? $ERRORS{"CRITICAL"} : $ERRORS{"WARNING"}  ;
+            }elsif ($msg_p >= $opt_C ) {
+                $state = $ERRORS{"CRITICAL"} ;
+            }
+        }
+    }
 
 
 
 } # end of ($mailq eq "qmail")
 elsif ( $mailq eq "exim" ) {
-        ## open mailq
-        if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
-                if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ | " ) ) {
-                        print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        }elsif( defined $utils::PATH_TO_MAILQ){
-                unless (-x $utils::PATH_TO_MAILQ) {
-                        print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        } else {
-                print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
-                exit $ERRORS{'UNKNOWN'};
-        }
-
-        while (<MAILQ>) {
-            #22m  1.7K 19aEEr-0007hx-Dy <> *** frozen ***
+    ## open mailq
+    if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
+        if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ | " ) ) {
+            print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    }elsif( defined $utils::PATH_TO_MAILQ){
+        unless (-x $utils::PATH_TO_MAILQ) {
+            print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    } else {
+        print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
+        exit $ERRORS{'UNKNOWN'};
+    }
+
+    while (<MAILQ>) {
+        #22m  1.7K 19aEEr-0007hx-Dy <> *** frozen ***
             #root@exlixams.glups.fr
 
-            if (/\s[\w\d]{6}-[\w\d]{6}-[\w\d]{2}\s/) { # message id 19aEEr-0007hx-Dy
-                $msg_q++ ;
-            }
-        }
-        close(MAILQ) ;
-
-        if ( $? ) {
-                print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ",$/;
-                exit $ERRORS{CRITICAL};
-        }
-        if ($msg_q < $opt_w) {
-                $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
-                $state = $ERRORS{'OK'};
-        }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
-                $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
-                $state = $ERRORS{'WARNING'};
-        }else {
-                $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
-                $state = $ERRORS{'CRITICAL'};
-        }
+        if (/\s[\w\d]{6}-[\w\d]{6}-[\w\d]{2}\s/) { # message id 19aEEr-0007hx-Dy
+        $msg_q++ ;
+        }
+    }
+    close(MAILQ) ;
+
+    if ( $? ) {
+        print "CRITICAL: Error code ".($?>>8)." returned from $utils::PATH_TO_MAILQ",$/;
+        exit $ERRORS{CRITICAL};
+    }
+    if ($msg_q < $opt_w) {
+        $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
+        $state = $ERRORS{'OK'};
+    }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
+        $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
+        $state = $ERRORS{'WARNING'};
+    }else {
+        $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
+        $state = $ERRORS{'CRITICAL'};
+    }
 } # end of ($mailq eq "exim")
 
 elsif ( $mailq eq "nullmailer" ) {
-        ## open mailq
-        if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
-                if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ | " ) ) {
-                        print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        }elsif( defined $utils::PATH_TO_MAILQ){
-                unless (-x $utils::PATH_TO_MAILQ) {
-                        print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        } else {
-                print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
-                exit $ERRORS{'UNKNOWN'};
-        }
-
-        while (<MAILQ>) {
-            #2022-08-25 01:30:40 502 bytes from <user@example.com>
-
-            if (/^\d{4}-\d{2}-\d{2}\s+\d{2}\:\d{2}\:\d{2}\s+\d+\sbytes/) {
-                $msg_q++ ;
-            }
-        }
-        close(MAILQ) ;
-        if ($msg_q < $opt_w) {
-                $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
-                $state = $ERRORS{'OK'};
-        }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
-                $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
-                $state = $ERRORS{'WARNING'};
-        }else {
-                $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
-                $state = $ERRORS{'CRITICAL'};
-        }
+    ## open mailq
+    if ( defined $utils::PATH_TO_MAILQ && -x $utils::PATH_TO_MAILQ ) {
+        if (! open (MAILQ, "$sudo $utils::PATH_TO_MAILQ | " ) ) {
+            print "ERROR: could not open $utils::PATH_TO_MAILQ \n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    }elsif( defined $utils::PATH_TO_MAILQ){
+        unless (-x $utils::PATH_TO_MAILQ) {
+            print "ERROR: $utils::PATH_TO_MAILQ is not executable by (uid $>:gid($)))\n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    } else {
+        print "ERROR: \$utils::PATH_TO_MAILQ is not defined\n";
+        exit $ERRORS{'UNKNOWN'};
+    }
+
+    while (<MAILQ>) {
+        #2022-08-25 01:30:40 502 bytes from <user@example.com>
+
+        if (/^\d{4}-\d{2}-\d{2}\s+\d{2}\:\d{2}\:\d{2}\s+\d+\sbytes/) {
+        $msg_q++ ;
+        }
+    }
+    close(MAILQ) ;
+    if ($msg_q < $opt_w) {
+        $msg = "OK: $mailq mailq ($msg_q) is below threshold ($opt_w/$opt_c)";
+        $state = $ERRORS{'OK'};
+    }elsif ($msg_q >= $opt_w  && $msg_q < $opt_c) {
+        $msg = "WARNING: $mailq mailq is $msg_q (threshold w = $opt_w)";
+        $state = $ERRORS{'WARNING'};
+    }else {
+        $msg = "CRITICAL: $mailq mailq is $msg_q (threshold c = $opt_c)";
+        $state = $ERRORS{'CRITICAL'};
+    }
 } # end of ($mailq eq "nullmailer")
 
 # Perfdata support
@@ -590,130 +589,130 @@ exit $state;
 
 
 sub process_arguments(){
-        GetOptions
-                ("V"   => \$opt_V, "version"    => \$opt_V,
-                 "v"   => \$opt_v, "verbose"    => \$opt_v,
-                 "h"   => \$opt_h, "help"       => \$opt_h,
-                 "M:s" => \$opt_M, "mailserver:s" => \$opt_M, # mailserver (default     sendmail)
-                 "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
-                 "W=i" => \$opt_W, "warning-domain=i"  => \$opt_W,   # Warning if above this number
-                 "C=i" => \$opt_C, "critical-domain=i" => \$opt_C,   # Critical if above this number
-                 "t=i" => \$opt_t, "timeout=i"  => \$opt_t,
-                 "s"   => \$opt_s, "sudo"       => \$opt_s,
-                 "d:s" => \$opt_d, "configdir:s" => \$opt_d,
-                 );
-
-        if ($opt_V) {
-                print_revision($PROGNAME,'@NP_VERSION@');
-                exit $ERRORS{'UNKNOWN'};
-        }
-
-        if ($opt_h) {
-                print_help();
-                exit $ERRORS{'UNKNOWN'};
-        }
-
-        if (defined $opt_v ){
-                $verbose = $opt_v;
-        }
-
-        unless (defined $opt_t) {
-                $opt_t = $utils::TIMEOUT ;      # default timeout
-        }
-
-        unless (  defined $opt_w &&  defined $opt_c ) {
-                print_usage();
-                exit $ERRORS{'UNKNOWN'};
-        }
-
-        if ( $opt_w >= $opt_c) {
-                print "Warning (-w) cannot be greater than Critical (-c)!\n";
-                exit $ERRORS{'UNKNOWN'};
-        }
-
-        if (defined $opt_W && ! defined !$opt_C) {
-                print "Need -C if using -W\n";
-                exit $ERRORS{'UNKNOWN'};
-        }elsif(defined $opt_W && defined $opt_C) {
-                if ($opt_W >= $opt_C) {
-                        print "Warning (-W) cannot be greater than Critical (-C)!\n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        }
-
-        if (defined $opt_M) {
-                if ($opt_M =~ /^(sendmail|qmail|postfix|exim|nullmailer)$/) {
-                        $mailq = $opt_M ;
-                }elsif( $opt_M eq ''){
-                        $mailq = 'sendmail';
-                }else{
-                        print "-M: $opt_M is not supported\n";
-                        exit $ERRORS{'UNKNOWN'};
-                }
-        }else{
-                if (defined $utils::PATH_TO_QMAIL_QSTAT
-                    && -x $utils::PATH_TO_QMAIL_QSTAT)
-                {
-                        $mailq = 'qmail';
-                }
-                elsif (-d '/var/lib/postfix' || -d '/var/local/lib/postfix'
-                       || -e '/usr/sbin/postfix' || -e '/usr/local/sbin/postfix')
-                {
-                        $mailq = 'postfix';
-                }
-                elsif (-d '/usr/lib/exim4' || -d '/usr/local/lib/exim4'
-                       || -e '/usr/sbin/exim' || -e '/usr/local/sbin/exim')
-                {
-                        $mailq = 'exim';
-                }
-                elsif (-d '/usr/lib/nullmailer' || -d '/usr/local/lib/nullmailer'
-                       || -e '/usr/sbin/nullmailer-send'
-                       || -e '/usr/local/sbin/nullmailer-send')
-                {
-                        $mailq = 'nullmailer';
-                }
-                else {
-                        $mailq = 'sendmail';
-                }
-        }
-
-        return $ERRORS{'OK'};
+    GetOptions
+        ("V"   => \$opt_V, "version"    => \$opt_V,
+         "v"   => \$opt_v, "verbose"    => \$opt_v,
+         "h"   => \$opt_h, "help"       => \$opt_h,
+         "M:s" => \$opt_M, "mailserver:s" => \$opt_M, # mailserver (default    sendmail)
+         "w=i" => \$opt_w, "warning=i"  => \$opt_w,   # warning if above this number
+         "c=i" => \$opt_c, "critical=i" => \$opt_c,   # critical if above this number
+         "W=i" => \$opt_W, "warning-domain=i"  => \$opt_W,   # Warning if above this number
+         "C=i" => \$opt_C, "critical-domain=i" => \$opt_C,   # Critical if above this number
+         "t=i" => \$opt_t, "timeout=i"  => \$opt_t,
+         "s"   => \$opt_s, "sudo"       => \$opt_s,
+         "d:s" => \$opt_d, "configdir:s" => \$opt_d,
+         );
+
+    if ($opt_V) {
+        print_revision($PROGNAME,'@NP_VERSION@');
+        exit $ERRORS{'UNKNOWN'};
+    }
+
+    if ($opt_h) {
+        print_help();
+        exit $ERRORS{'UNKNOWN'};
+    }
+
+    if (defined $opt_v ){
+        $verbose = $opt_v;
+    }
+
+    unless (defined $opt_t) {
+        $opt_t = $utils::TIMEOUT ;    # default timeout
+    }
+
+    unless (  defined $opt_w &&  defined $opt_c ) {
+        print_usage();
+        exit $ERRORS{'UNKNOWN'};
+    }
+
+    if ( $opt_w >= $opt_c) {
+        print "Warning (-w) cannot be greater than Critical (-c)!\n";
+        exit $ERRORS{'UNKNOWN'};
+    }
+
+    if (defined $opt_W && ! defined !$opt_C) {
+        print "Need -C if using -W\n";
+        exit $ERRORS{'UNKNOWN'};
+    }elsif(defined $opt_W && defined $opt_C) {
+        if ($opt_W >= $opt_C) {
+            print "Warning (-W) cannot be greater than Critical (-C)!\n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    }
+
+    if (defined $opt_M) {
+        if ($opt_M =~ /^(sendmail|qmail|postfix|exim|nullmailer)$/) {
+            $mailq = $opt_M ;
+        }elsif( $opt_M eq ''){
+            $mailq = 'sendmail';
+        }else{
+            print "-M: $opt_M is not supported\n";
+            exit $ERRORS{'UNKNOWN'};
+        }
+    }else{
+        if (defined $utils::PATH_TO_QMAIL_QSTAT
+            && -x $utils::PATH_TO_QMAIL_QSTAT)
+        {
+            $mailq = 'qmail';
+        }
+        elsif (-d '/var/lib/postfix' || -d '/var/local/lib/postfix'
+               || -e '/usr/sbin/postfix' || -e '/usr/local/sbin/postfix')
+        {
+            $mailq = 'postfix';
+        }
+        elsif (-d '/usr/lib/exim4' || -d '/usr/local/lib/exim4'
+               || -e '/usr/sbin/exim' || -e '/usr/local/sbin/exim')
+        {
+            $mailq = 'exim';
+        }
+        elsif (-d '/usr/lib/nullmailer' || -d '/usr/local/lib/nullmailer'
+               || -e '/usr/sbin/nullmailer-send'
+               || -e '/usr/local/sbin/nullmailer-send')
+        {
+            $mailq = 'nullmailer';
+        }
+        else {
+            $mailq = 'sendmail';
+        }
+    }
+
+    return $ERRORS{'OK'};
 }
 
 sub print_usage () {
-        print "Usage: $PROGNAME -w <warn> -c <crit> [-W <warn>] [-C <crit>] [-M <MTA>] [-t <timeout>] [-s] [-d <CONFIGDIR>] [-v]\n";
+    print "Usage: $PROGNAME -w <warn> -c <crit> [-W <warn>] [-C <crit>] [-M <MTA>] [-t <timeout>] [-s] [-d <CONFIGDIR>] [-v]\n";
 }
 
 sub print_help () {
-        print_revision($PROGNAME,'@NP_VERSION@');
-        print "Copyright (c) 2002 Subhendu Ghosh/Carlos Canau/Benjamin Schmid\n";
-        print "\n";
-        print_usage();
-        print "\n";
-        print "   Checks the number of messages in the mail queue (supports multiple sendmail queues, qmail)\n";
-        print "   Feedback/patches to support non-sendmail mailqueue welcome\n\n";
-        print "-w (--warning)   = Min. number of messages in queue to generate warning\n";
-        print "-c (--critical)  = Min. number of messages in queue to generate critical alert ( w < c )\n";
-        print "-W (--warning-domain)  = Min. number of messages for same domain in queue to generate warning\n";
-        print "-C (--critical-domain) = Min. number of messages for same domain in queue to generate critical alert ( W < C )\n";
-        print "-t (--timeout)   = Plugin timeout in seconds (default = $utils::TIMEOUT)\n";
-        print "-M (--mailserver) = [ sendmail | qmail | postfix | exim | nullmailer ] (default = autodetect)\n";
-        print "-s (--sudo)      = Use sudo to call the mailq command\n";
-        print "-d (--configdir) = Config file or directory\n";
-        print "-h (--help)\n";
-        print "-V (--version)\n";
-        print "-v (--verbose)         = debugging output\n";
-        print "\n\n";
-        print "Note: -w and -c are required arguments.  -W and -C are optional.\n";
-        print " -W and -C are applied to domains listed on the queues - both FROM and TO. (sendmail)\n";
-        print " -W and -C are applied message not yet preproccessed. (qmail)\n";
-        print " This plugin tries to autodetect which mailserver you are running,\n";
-        print " you can override the autodetection with -M.\n";
-        print " This plugin uses the system mailq command (sendmail) or qmail-stat (qmail)\n";
-        print " to look at the queues. Mailq can usually only be accessed by root or \n";
-        print " a TrustedUser. You will have to set appropriate permissions for the plugin to work.\n";
-        print "";
-        print "\n\n";
-        support();
+    print_revision($PROGNAME,'@NP_VERSION@');
+    print "Copyright (c) 2002 Subhendu Ghosh/Carlos Canau/Benjamin Schmid\n";
+    print "\n";
+    print_usage();
+    print "\n";
+    print "   Checks the number of messages in the mail queue (supports multiple sendmail queues, qmail)\n";
+    print "   Feedback/patches to support non-sendmail mailqueue welcome\n\n";
+    print "-w (--warning)   = Min. number of messages in queue to generate warning\n";
+    print "-c (--critical)  = Min. number of messages in queue to generate critical alert ( w < c )\n";
+    print "-W (--warning-domain)  = Min. number of messages for same domain in queue to generate warning\n";
+    print "-C (--critical-domain) = Min. number of messages for same domain in queue to generate critical alert ( W < C )\n";
+    print "-t (--timeout)   = Plugin timeout in seconds (default = $utils::TIMEOUT)\n";
+    print "-M (--mailserver) = [ sendmail | qmail | postfix | exim | nullmailer ] (default = autodetect)\n";
+    print "-s (--sudo)      = Use sudo to call the mailq command\n";
+    print "-d (--configdir) = Config file or directory\n";
+    print "-h (--help)\n";
+    print "-V (--version)\n";
+    print "-v (--verbose)         = debugging output\n";
+    print "\n\n";
+    print "Note: -w and -c are required arguments.  -W and -C are optional.\n";
+    print " -W and -C are applied to domains listed on the queues - both FROM and TO. (sendmail)\n";
+    print " -W and -C are applied message not yet preproccessed. (qmail)\n";
+    print " This plugin tries to autodetect which mailserver you are running,\n";
+    print " you can override the autodetection with -M.\n";
+    print " This plugin uses the system mailq command (sendmail) or qmail-stat (qmail)\n";
+    print " to look at the queues. Mailq can usually only be accessed by root or \n";
+    print " a TrustedUser. You will have to set appropriate permissions for the plugin to work.\n";
+    print "";
+    print "\n\n";
+    support();
 }