Collectd::Unixsock: Handle instance `0' and interpret a returned `NaN' correctly.

diff --git a/contrib/PerlLib/Collectd/Unixsock.pm b/contrib/PerlLib/Collectd/Unixsock.pm
index b6814f8..92e8772 100644 (file)
--- a/contrib/PerlLib/Collectd/Unixsock.pm
+++ b/contrib/PerlLib/Collectd/Unixsock.pm
@@ -76,9 +76,9 @@ sub _create_identifier
 
        $host = $args->{'host'};
        $plugin = $args->{'plugin'};
-       $plugin .= '-' . $args->{'plugin_instance'} if ($args->{'plugin_instance'});
+       $plugin .= '-' . $args->{'plugin_instance'} if (defined ($args->{'plugin_instance'}));
        $type = $args->{'type'};
-       $type .= '-' . $args->{'type_instance'} if ($args->{'type_instance'});
+       $type .= '-' . $args->{'type_instance'} if (defined ($args->{'type_instance'}));
 
        return ("$host/$plugin/$type");
 } # _create_identifier
@@ -133,10 +133,12 @@ sub getval
        $identifier = _create_identifier (\%args) or return;
 
        $msg = "GETVAL $identifier\n";
+       #print "-> $msg";
        send ($fh, $msg, 0) or confess ("send: $!");
 
        $msg = undef;
        recv ($fh, $msg, 1024, 0) or confess ("recv: $!");
+       #print "<- $msg";
 
        ($status, $msg) = split (' ', $msg, 2);
        if ($status <= 0)
@@ -148,7 +150,11 @@ sub getval
        for (split (' ', $msg))
        {
                my $entry = $_;
-               if ($entry =~ m/^(\w+)=($RE{num}{real})$/)
+               if ($entry =~ m/^(\w+)=NaN$/)
+               {
+                       $ret->{$1} = undef;
+               }
+               elsif ($entry =~ m/^(\w+)=($RE{num}{real})$/)
                {
                        $ret->{$1} = 0.0 + $2;
                }
@@ -198,9 +204,11 @@ sub putval
        }
 
        $msg = "PUTVAL $identifier $values\n";
+       #print "-> $msg";
        send ($fh, $msg, 0) or confess ("send: $!");
        $msg = undef;
        recv ($fh, $msg, 1024, 0) or confess ("recv: $!");
+       #print "<- $msg";
 
        ($status, $msg) = split (' ', $msg, 2);
        return (1) if ($status == 0);