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<?php
/*!***************************************************************************
*! FILE NAME : elphel_functions_include.php
*! DESCRIPTION: various 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/>.
*! -----------------------------------------------------------------------------**
*/
/*
* Contents:
* * OTHER
* * LOG AND XML RESPONSE
* * PARALLEL HTTP REQUESTS
* * DEVICES
*/
// OTHER
function get_uptime(){
exec('cat /proc/uptime',$output,$retval);
return floatval(explode(" ",trim($output[0]))[0]);
}
// LOG AND XML RESPONSE
function colorize($string, $color, $bold) {
$color = strtoupper($color);
$attr = array();
switch ($color) {
case 'RED': $attr[]='31'; break;
case'GREEN': $attr[]='32'; break;
case 'YELLOW': $attr[]='33'; break;
case 'BLUE': $attr[]='34'; break;
case 'MAGENTA': $attr[]='35'; break;
case 'CYAN': $attr[]='36'; break;
case 'GRAY': $attr[]='37'; break;
}
if ($bold) $attr[] = '1';
return sprintf("\x1b[%sm%s\x1b[0m",implode(';',$attr), $string);
}
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);
}
}
}
// PARALLEL HTTP REQUESTS
// Using parallel requests, PHP has to be configured '--with-curl=' (and libcurl should be installed)
function curl_multi_start($urls, $with_headers=0) {
// 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, $with_headers);
$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, $with_headers = 0) {
$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 ();
$names = array ();
if ($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, $ch);
if ($with_headers==1){
$hsize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$h = substr($r, 0, $hsize);
$r = substr($r, $hsize);
$names[] = curl_get_filename_from_header($h);
}
$results[] = $r;
}
if ($with_headers==1){
$results = Array('names' => $names,'contents'=> $results);
}
}
curl_multi_close ($curl_mh);
return $results;
}
function curl_get_filename_from_header($h){
$h = explode("\n",$h);
$res = "";
if ($h){
foreach($h as $e){
if (strlen($e)!=0){
$tmp = explode(":",$e);
if ($tmp[0]=="Content-Disposition"){
$tmp = explode(";",$tmp[1]);
foreach($tmp as $t){
$t = trim($t);
$t = explode("=",$t);
if ($t[0]=="filename"){
$res = trim($t[1]," \t\n\r\0\x0B\"");
break;
}
}
break;
}
}
}
}
return $res;
}
// DEVICES
/** Get a list of suitable partitions. The list will contain SATA devices only and
* will have the following format: "name" => "size_in_blocks".
*/
function get_partitions()
{
$names = array();
$regexp = '/([0-9]+) +(sd[a-z0-9]+$)/';
exec("cat /proc/partitions", $partitions);
// the first two elements of an array are table header and empty line delimiter, skip them
for ($i = 2; $i < count($partitions); $i++) {
// select SATA devices only
if (preg_match($regexp, $partitions[$i], $name) == 1) {
$names[$name[2]] = $name[1];
$j++;
}
}
return $names;
}
/** Get a list of disk devices which have file system and can be mounted. This function
* uses 'blkid' command from busybox.
*/
function get_mnt_dev()
{
$partitions = get_partitions();
$devices = array();
$fs_types = array();
foreach ($partitions as $partition => $size) {
$res = array();
$dev = "/dev/" . $partition;
exec("blkid " . $dev, $res);
if (!empty($res)) {
$devices[$i] = preg_replace('/: +.*/', "", $res[0]);
if (preg_match('/(?<=TYPE=")[a-z0-9]+(?=")/', $res[0], $fs) == 1)
$fs_types[$i] = $fs[0];
else
$fs_types[$i] = "none";
$i++;
}
}
return array("devices" => $devices, "types" => $fs_types);
}
/** Get a list of devices whithout file system which can be used for raw disk storage from camogm. */
function get_raw_dev()
{
$j = 0;
$ret = get_mnt_dev();
$devices = $ret["devices"];
$types = $ret["types"];
$names = get_partitions();
// filter out partitions with file system
$i = 0;
$raw_devices = array();
foreach ($names as $name => $size) {
$found = false;
foreach ($devices as $device) {
if (strpos($device, $name) !== false)
$found = true;
}
if ($found === false) {
// current partition is not found in the blkid list, add it to raw devices
$raw_devices["/dev/" . $name] = $size;
$i++;
}
}
//special case
if (count($raw_devices)>1) {
foreach($raw_devices as $k=>$v){
if (preg_match('/sd[a-z][0-9]/',$k)==0) {
unset($raw_devices[$k]);
}
}
}
return $raw_devices;
}
?>