public function testBuildCommandException()
{
global $config;
$config['rrdcached'] = '';
$config['rrdtool_version'] = '1.4';
$this->setExpectedException('LibreNMS\\Exceptions\\FileExistsException');
// use this file, since it is guaranteed to exist
rrdtool_build_command('create', __FILE__, 'o');
}
/**
* Generates and pipes a command to rrdtool
*
* @internal
* @param string $command create, update, updatev, graph, graphv, dump, restore, fetch, tune, first, last, lastupdate, info, resize, xport, flushcached
* @param string $filename The full patth to the rrd file
* @param string $options rrdtool command options
* @return array the output of stdout and stderr in an array
* @throws FileExistsException thrown when a create command is set to rrdtool < 1.4 and the rrd already exists
* @throws Exception thrown when the rrdtool process(s) cannot be started
*/
function rrdtool($command, $filename, $options)
{
global $config, $debug, $vdebug, $rrd_async_process, $rrd_sync_process;
try {
$cmd = rrdtool_build_command($command, $filename, $options);
} catch (FileExistsException $e) {
c_echo('RRD[%g' . $filename . " already exists%n]\n", $debug);
return array(null, null);
}
c_echo("RRD[%g{$cmd}%n]\n", $debug);
// do not write rrd files, but allow read-only commands
$ro_commands = array('graph', 'graphv', 'dump', 'fetch', 'first', 'last', 'lastupdate', 'info', 'xport');
if (!empty($config['norrd']) && !in_array($command, $ro_commands)) {
c_echo('[%rRRD Disabled%n]');
return array(null, null);
}
// send the command!
if ($command == 'last' && rrdtool_initialize(false)) {
// send this to our synchronous process so output is guaranteed
$output = $rrd_sync_process->sendCommand($cmd);
} elseif (rrdtool_initialize()) {
// don't care about the return of other commands, so send them to the faster async process
$output = $rrd_async_process->sendCommand($cmd);
} else {
throw new Exception('rrdtool could not start');
}
if ($vdebug) {
echo 'RRDtool Output: ';
echo $output[0];
echo $output[1];
}
return $output;
}
