From 3fbcb1be0ff7dd667a082990efc3ee4f22d622c2 Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Thu, 10 Jan 2013 21:50:47 +0100
Subject: replace ok, warning, critical subs with generic msg sub

---
 net_if | 39 ++++++++++++++++++++++-----------------
 1 file changed, 22 insertions(+), 17 deletions(-)

diff --git a/net_if b/net_if
index 3ca31a8..62d1dab 100755
--- a/net_if
+++ b/net_if
@@ -6,19 +6,24 @@ use strict;
 $ENV{'PATH'} = '/bin:/usr/bin:/sbin:/usr/sbin';
 delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
 
-sub critical {
-    print "CRITICAL - @_\n";
-    exit 2;
-}
-
-sub warning {
-    print "WARNING - @_\n";
-    exit 1;
-}
-
-sub ok {
-    print "OK - @_\n";
-    exit 0;
+# define nagios status codes
+my %nagios = (
+    'ok' => ["OK", 0],
+    'warn' => ["WARNING", 1],
+    'crit' => ["CRITICAL", 2],
+    'unknown' => ["UNKNOWN", 3]
+);
+
+# Print nagios compatible status message and terminat script
+# with apropiate return code.
+#
+# parameter: type of message
+sub msg ($@) {
+    my $type = shift;
+    my ($msg, $exit) = @{$nagios{$type}};
+
+    print $msg, " - ", @_, "\n";
+    exit $exit;
 }
 
 sub get_if_status {
@@ -30,7 +35,7 @@ sub get_if_status {
         $if = $1;
 
         my $pid = open(IFCONFIG, "-|");
-        die "$0: fork: $!" unless defined $pid;
+        msg('crit', "fork: $!") unless defined $pid;
 
         if ($pid == 0) {
             # child
@@ -92,19 +97,19 @@ sub print_stats {
         }
     }
 
-    ok("$count interfaces |$perfdata");
+    msg('ok', "$count interfaces |$perfdata");
 }
 
 my ($up, $down, $error) = get_if_status(@ARGV);
 
 if (@$error) {
     $error = join ", ", @$error;
-    critical("Some interfaces does not exists: $error");
+    msg('crit', "Some interfaces does not exists: $error");
 }
 
 if (@$down) {
     $down = join ", ", @$down;
-    warning("Some interfaces are down: $down");
+    msg('warn', "Some interfaces are down: $down");
 }
 
 my $stats = {};
-- 
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