forgot to add

    break;

  case "free_space":

    if ($_GET['mountpoint']=="/mnt/sda2"){

      respond_xml("test");

      //unpartitioned area

    }else{

        if (is_dir($mountpoint)) $res = disk_free_space($mountpoint);

<?php

/*!***************************************************************************

*! FILE NAME  : parallel_requests.php

*! DESCRIPTION: send out parallel url requests and collect responses

*! Copyright (C) 2016 Elphel, Inc

*! -----------------------------------------------------------------------------**

*!

*!  This program is free software: you can redistribute it and/or modify

*!  it under the terms of the GNU General Public License as published by

*!  the Free Software Foundation, either version 3 of the License, or

*!  (at your option) any later version.

*!

*!  This program is distributed in the hope that it will be useful,

*!  but WITHOUT ANY WARRANTY; without even the implied warranty of

*!  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

*!  GNU General Public License for more details.

*!

*!  You should have received a copy of the GNU General Public License

*!  along with this program.  If not, see <http://www.gnu.org/licenses/>.

*! -----------------------------------------------------------------------------**

*/

// Using parallel requests, PHP has to be configured '--with-curl=' (and libcurl should be installed)

function curl_multi_start($urls) {

	// numprime is needed to actually send the request and remote starts executing it

	// Not really clear - what it should be

	$numprime = 4; // magic number, see http://lampe2e.blogspot.com/2015/03/making-stuff-faster-with-curlmultiexec.html

	$curl_mh = curl_multi_init ();

	$aCurlHandles = array ();

	foreach ($urls as $url) {

		$ch = curl_init ();

		curl_setopt ($ch, CURLOPT_URL, $url);

		curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

		curl_setopt ($ch, CURLOPT_HEADER, 0);

		$aCurlHandles[] = $ch;

		curl_multi_add_handle ($curl_mh, $ch);

	}

	$curl_active = count ($urls);

	for($x = 0; $x < $numprime && $curl_active; $x++) {

		curl_multi_exec ($curl_mh, $curl_active);

		// we wait for a bit to allow stuff TCP handshakes to complete and so forth...

		usleep (10000);

//		echo ".";

	}

	return array ("mh" => $curl_mh,"handles" => $aCurlHandles);

}

function curl_multi_finish($data, $use_xml=true, $ntry=0, $echo = false) {

	$curl_active = 1;

	$curl_mrc = CURLM_OK;

	$nrep = 0;

	$curl_mh = $data['mh'];

	while ($curl_active && $curl_mrc == CURLM_OK ) {

		if (curl_multi_select ($curl_mh) != -1) {

			do {

				$curl_mrc = curl_multi_exec ($curl_mh, $curl_active);

			} while ($curl_mrc == CURLM_CALL_MULTI_PERFORM );

		}

		if ($echo) echo colorize("$curl_active ",'YELLOW',1);

		$nrep++;

		if ($ntry && ($nrep > $ntry)) {

			break;

		}

	}

	$results = array ();

	if ($use_xml) {

		foreach ($data['handles'] as $i => $ch) {

			$xml = simplexml_load_string (curl_multi_getcontent ($ch));

			curl_multi_remove_handle ($curl_mh, $ch);

			$results[$i] = array ();

			foreach ($xml as $tag => $value) {

				$svalue = (string) $value;

				if (strlen ($svalue) > 0) {

					if ($svalue[0] == '"') $results[$i][$tag] = trim ($svalue, '"');

					else $results[$i][$tag] = (int) $svalue;

				}

			}

		}

	} else {

		foreach ($data['handles'] as $i => $ch) {

			$r = curl_multi_getcontent ($ch);

			curl_multi_remove_handle ($curl_mh, $ch);

			$results[] = $r;

		}

	}

	curl_multi_close ($curl_mh);

	return $results;

}

?>

<?php

/*

*!***************************************************************************

*! FILE NAME  : include_response.php

*! DESCRIPTION: http requests response functions

*! Copyright (C) 2016 Elphel, Inc.

*! --------------------------------------------------------------------------

*!  This program is free software: you can redistribute it and/or modify

*!  it under the terms of the GNU General Public License as published by

*!  the Free Software Foundation, either version 3 of the License, or

*!  (at your option) any later version.

*!

*!  This program is distributed in the hope that it will be useful,

*!  but WITHOUT ANY WARRANTY; without even the implied warranty of

*!  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

*!  GNU General Public License for more details.

*!

*!  You should have received a copy of the GNU General Public License

*!  along with this program.  If not, see <http://www.gnu.org/licenses/>.

*! --------------------------------------------------------------------------

*/

function get_uptime(){

	exec('cat /proc/uptime',$output,$retval);

	return floatval(explode(" ",trim($output[0]))[0]);

}

//printf("%08.2f\n",$f);

function log_open(){

	$GLOBALS['logFile'] = fopen ( $GLOBALS['logFilePath'], "a" );

}

/** Log message and optionally print to console */

function log_msg($msg,         ///< message to print

		         $mode = -1)   ///< -1 - print only short messages, 0 - never print, 1 - always print, 2 print in bold red (error), 3 - bold white, 4 - bold yellow (warning)

{

// do not output log when in HTTP request mode

	$ut=get_uptime();

	if (($mode != 0) && !array_key_exists ('REQUEST_METHOD', $_SERVER) && (($mode > 0) || (strlen ($msg) < $GLOBALS['LOG_MAX_ECHO']))) {

		switch ($mode) {

			case 2:

				$emsg = colorize($msg,'RED',1); // bold red

				break;

			case 3:

				$emsg = colorize($msg,'',1);    // bold white

				break;

			case 4 :

				$emsg = colorize($msg, 'YELLOW', 1); // bold white

				break;

			default:

				$emsg = $msg;

		}

		printf(colorize(sprintf("[%8.2f] autocampars: ",$ut),"GREEN",0).$emsg."\n");

	}

	fwrite ($GLOBALS['logFile'], sprintf("%08.2f autocampars: %s\n",$ut,$msg)); // date ("F j, Y, G:i:s")

}

function log_error($msg) {

	log_msg ($msg, 2);

	log_close ();

	exit (1);

}

function log_close() {

	log_msg ("Log file saved as " . $GLOBALS['logFilePath'], 3);

	log_msg ("----------------------------------------------", 0);

	fclose ($GLOBALS['logFile']);

	unset ($GLOBALS['logFile']); // to catch errors

}

/** Closes log file, optianally responxds with XML (if in HTTP mode), exits with 0/1 */

function respond_xml($result,$error=null,$color_mode = 3){ // default white bold

	if (array_key_exists('REQUEST_METHOD',$_SERVER)){

		$xml = new SimpleXMLElement("<?xml version='1.0'  standalone='yes'?><Document/>");

		if ($result !== ""){ //"" will not be loged/output

			if (is_string($result) && ((count($result)==0) || ($result[0] != '"'))){

				$result = '"'.$result.'"';

			}

			$xml->addChild ('result',$result);

		}

		if ($error){

			$xml->addChild ('error','"'.$error.'"');

		}

		$rslt=$xml->asXML();

		header("Content-Type: text/xml");

		header("Content-Length: ".strlen($rslt)."\n");

		header("Pragma: no-cache\n");

		printf($rslt);

	}

	if (isset($GLOBALS['logFile'])){

		if ($result !== ""){ //"" will not be loged/output

			log_msg(''.$result,$color_mode);

		}

		if ($error){

			log_error($error);

		} else {

			log_close();

			exit (0);

		}

	}

}

?>