[Nagiosplug-devel] plugin help

[Aditya Ivaturi]

This is the first time I am trying to write a plugin for Nagios. So please 
bear with me. We have an online testing system and I am writing a plugin 
to check how many users are actually taking a test. It is a module that is 
in built in the system and exported via http. So all I do is call that 
page and dump the number out. Nothing complicated. The code-block (perl) 
which dumps out is as follows:


if ($content =~ m/<TD>Student Cache<\/TD><TD>(\d*)<\/TD>/) {
    if ($1>$critical) {
        if ($verbose) {
            print "CRITICAL: $1 Users Online > $critical Critical Status 
\t Critical ErrorLev 2 | UsersOnline=$1;0;0;\n";
        }
        else {
            print "CRITICAL: $1 Users Online | UsersOnline=$1;0;0;\n";
        }
        exit $ERRORS{'CRITICAL'};
    }
    elsif ($1>$warning) {
        if ($verbose) {
            print "WARNING: $1 # Users Online > $warning Warning Status \t 
Critical ErrorLev 1 | UsersOnline=$1;0;0;\n";
        }
        else {
            print "WARNING: $1 Users Online | UsersOnline=$1;0;0;\n";};
        exit $ERRORS{'WARNING'};
    }
    else {
        if ($verbose) {
            print "OK: $1 Users Online - Status normal \t Normal ErrorLev 
0 | UsersOnline=$1;0;0;\n";
        }
        else {
            print "OK: $1 Users Online | UsersOnline=$1;0;0;\n";
        }
        exit $ERRORS{'OK'};
    }
}


For e.g the output will look like:

OK: 12 Users Online | UsersOnline=12;0;0; 

where -w is 150 and -c is 200. But nagios complains by saying "NRPE: 
Unable to read output". Is the format of the output wrong or am I missing 
any steps?

--Turi



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