/**
* Run a shell command. This function returns STD_ERR as well unlike
* PHPs inbuilt shell commands like shell_exec() or passthru() or system().
* @return string
*/
function shellCommand($command, $timeoutInSeconds = null, $dataToStdIn = null, $haltOnError = false)
{
if ($timeoutInSeconds === null) {
$timeoutInSeconds = 120;
}
$pipes = null;
if ($dataToStdIn) {
$descriptor = array(0 => array("pipe", "r"), 1 => array("pipe", "w"), 2 => array("pipe", "w"));
$currentWorkingDirectory = getOperatingSystemsTemporaryDirectory();
$envionmentVariables = array();
$process = proc_open($command, $descriptor, $pipes, $currentWorkingDirectory, $envionmentVariables);
fwrite($pipes[0], $dataToStdIn);
fclose($pipes[0]);
stream_set_timeout($pipes[1], $timeoutInSeconds);
stream_set_timeout($pipes[2], $timeoutInSeconds);
} else {
$process = popen("({$command})2>&1&", "r");
if ($timeoutInSeconds == 0) {
pclose($process);
return;
}
//stream_set_timeout($process, $timeoutInSeconds);
$pipes[] = $process;
}
if (!is_resource($process)) {
if ($haltOnError) {
webServiceError($command);
}
if (!$dataToStdIn) {
return null;
}
return array('stdOut' => null, 'statusCode' => -1, 'stdErr' => null);
}
$response = array();
$endTime = microtime(true) + (double) $timeoutInSeconds;
foreach ($pipes as $pipe) {
if (!is_resource($pipe)) {
continue;
}
$returnValue = null;
while (!feof($pipe)) {
$returnValue .= fgets($pipe, 8);
$streamInfo = stream_get_meta_data($pipe);
if ($streamInfo['timed_out'] === true || microtime(true) > $endTime) {
$returnValue .= 'Docvert timeout';
break;
}
}
$response[] = $returnValue;
pclose($pipe);
}
if (!$dataToStdIn) {
return $response[0];
} else {
$statusCode = proc_close($process);
if ($statusCode !== 0 && $haltOnError) {
webServiceError($statusCode . ' ' . implode(' ', $pipes));
}
return array('stdOut' => $response[0], 'statusCode' => $statusCode, 'stdErr' => $response[1]);
}
}
function getWritableDirectory()
{
$defaultWritableDirectory = dirname(dirname(__FILE__)) . DIRECTORY_SEPARATOR . 'writable' . DIRECTORY_SEPARATOR;
if (is_writable($defaultWritableDirectory)) {
return $defaultWritableDirectory;
}
return getOperatingSystemsTemporaryDirectory();
}
