*
*/
/**
* Opens up a pipe to RRDTool using handles provided
*
* @return boolean
* @global config
* @global debug
* @param &rrd_process
* @param &rrd_pipes
*/
function rrdtool_pipe_open(&$rrd_process, &$rrd_pipes)
{
global $config, $debug;
$command = $config['rrdtool'] . " -";
# $command = "/usr/bin/php /home/observium/dev/testpipe.php";
$descriptorspec = array(
0 => array("pipe", "r"), // stdin is a pipe that the child will read from
1 => array("pipe", "w"), // stdout is a pipe that the child will write to
2 => array("pipe", "w") // stderr is a pipe that the child will write to
);
$cwd = $config['rrd_dir'];
$env = array();
$rrd_process = proc_open($command, $descriptorspec, $rrd_pipes, $cwd, $env);
stream_set_blocking($rrd_pipes[1], 0);
stream_set_blocking($rrd_pipes[2], 0);
if (is_resource($rrd_process))
{
// $pipes now looks like this:
// 0 => writeable handle connected to child stdin
// 1 => readable handle connected to child stdout
// Any error output will be appended to /tmp/error-output.txt
return TRUE;
}
}
/**
* Closes the pipe to RRDTool
*
* @return integer
* @param resource rrd_process
* @param array rrd_pipes
*/
function rrdtool_pipe_close(&$rrd_process, &$rrd_pipes)
{
if ($debug)
{
echo stream_get_contents($rrd_pipes[1]);
echo stream_get_contents($rrd_pipes[2]);
}
fclose($rrd_pipes[0]);
fclose($rrd_pipes[1]);
fclose($rrd_pipes[2]);
// It is important that you close any pipes before calling
// proc_close in order to avoid a deadlock
$return_value = proc_close($rrd_process);
if ($debug)
{
echo $return_value;
}
}
/**
* Generates a graph file at $graph_file using $options
* Opens its own rrdtool pipe.
*
* @return integer
* @param string graph_file
* @param string options
*/
function rrdtool_graph($graph_file, $options)
{
global $config, $debug;
rrdtool_pipe_open($rrd_process, $rrd_pipes);
if (is_resource($rrd_process))
{
// $pipes now looks like this:
// 0 => writeable handle connected to child stdin
// 1 => readable handle connected to child stdout
// Any error output will be appended to /tmp/error-output.txt
if ($config['rrdcached'])
{
fwrite($rrd_pipes[0], "graph --daemon " . $config['rrdcached'] . " $graph_file $options");
} else {
fwrite($rrd_pipes[0], "graph $graph_file $options");
}
rrdtool_pipe_close($rrd_process, $rrd_pipes);
if ($debug)
{
echo("");
if ($debug) { echo("graph $graph_file $options"); }
echo("
");
echo "command returned $return_value\n";
echo("
");
}
}
}
/**
* Generates and pipes a command to rrdtool
*
* @param string command
* @param string filename
* @param string options
* @global config
* @global debug
* @global rrd_pipes
*/
function rrdtool($command, $filename, $options)
{
global $config, $debug, $rrd_pipes;
$cmd = "$command $filename $options";
if ($command != "create" && $config['rrdcached'])
{
$cmd .= " --daemon " . $config['rrdcached'];
}
fwrite($rrd_pipes[0], $cmd."\n");
if ($debug)
{
echo stream_get_contents($rrd_pipes[1]);
echo stream_get_contents($rrd_pipes[2]);
echo("");
echo("\n".$cmd."\n");
echo("
");
} else {
$tmp = stream_get_contents($rrd_pipes[1]).stream_get_contents($rrd_pipes[2]);
}
}
/**
* Generates an rrd database at $filename using $options
*
* @param string filename
* @param string options
*/
function rrdtool_create($filename, $options)
{
global $config, $debug;
$command = $config['rrdtool'] . " create $filename $options";
if ($debug) { echo($command."\n"); }
return shell_exec($command);
# return rrdtool("create", $filename, $options);
}
function rrdtool_update($filename, $options)
{
return rrdtool("update", $filename, $options);
}
function rrdtool_fetch($filename, $options)
{
return rrdtool("fetch", $filename, $options);
}
function rrdtool_last($filename, $options)
{
return rrdtool("last", $filename, $options);
}
function rrdtool_lastupdate($filename, $options)
{
return rrdtool("lastupdate", $filename, $options);
}
?>